Grand Teton's three priorities — crowd, weather, access — converge in September: every road is still open, aspens turn gold by mid-month, school-restart pulls crowds below July-August, and the elk rut begins late in the month. June is the next-best window for wildflowers and full daylight, but the inner Teton Park Road typically opens only late in the month. Avoid late October through April if you need every park road open.
Photo · NPS Photo / D. Lehle · NPS sourceThe best overall month at Grand Teton is September — every park road is still open, school-restart pulls visits below the July-August peak, and aspens turn gold mid-to-late September at valley elevation.
Peak month is July, with a five-year mean of about 732,000 recreation visits. The quietest is December, near 49,000 — about 7% of July's peak. Daytime highs at the valley floor (~6,805 ft) reach the mid-60s°F in September.
By mid-September, the school restart drops family travel and afternoon thunderstorms ease. The Teton Park Road, Moose-Wilson Road, and every district remain open, the elk rut begins late in the month (NPS elk page), and aspen color peaks along Schwabacher Landing and Oxbow Bend.
From November through late April, the inner Teton Park Road is closed to cars; the US-89/US-191/US-26 through-corridor stays plowed year-round for wildlife viewing and cross-country skiing on the snow-covered inner roadbed.
Three independent signals per month — crowd, weather, and access. Tap any row to read the full Grand Teton guide for that month. We deliberately do not combine these into a single "best month" number; different priorities point at different months.
| Month | Crowd | Weather | Access | What that means |
|---|---|---|---|---|
| January→ |
Empty
8% of peak · 57K visits
|
Harsh
24°F / 1°F (-4°C / -17°C) · 39.5″ snow
|
Partial
Composite access score · 55/100
|
Quiet month. Most through-routes plowed; inner Teton Park Road closed to cars. Deep snow, frigid nights, short days; cross-country skiing the snow-covered inner road.Read January → |
| February→ |
Empty
8% of peak · 56K visits
|
Harsh
30°F / 4°F (-1°C / -16°C) · 28.2″ snow
|
Partial
Composite access score · 55/100
|
Still quiet. Through-routes open; inner park road remains a winter trail. Cold but lengthening days; classic Teton winter photography from US-89/26/191 pullouts.Read February → |
| March→ |
Empty
9% of peak · 65K visits
|
Harsh
39°F / 12°F (4°C / -11°C) · 22.0″ snow
|
Partial
Composite access score · 55/100
|
Crowds remain low. Through-routes plowed. Snow lingers on trails; valley nights well below freezing. Confirm winter-trail conditions on the NPS Grand Teton page.Read March → |
| April→ |
Empty
10% of peak · 75K visits
|
Harsh
46°F / 21°F (8°C / -6°C) · 11.7″ snow
|
Mostly open
Composite access score · 65/100
|
Pre-shoulder. Through-route corridor reliable; Teton Park Road inner section still closed to cars. Lakes ice-covered, trails muddy or snowy.Read April → |
| May→ |
Moderate
42% of peak · 306K visits
|
Good
56°F / 31°F (14°C / -1°C) · 2.9″ snow
|
Full
Composite access score · 85/100
|
Spring ramp. Teton Park Road typically reopens to cars late in the month — confirm dates on the NPS Grand Teton page. Snowmelt, bears active, mud season.Read May → |
| June→ |
Packed
86% of peak · 633K visits
|
Ideal
67°F / 37°F (19°C / 3°C) · 1.75″ precip
|
Full
Composite access score · 100/100
|
Heavy ramp into summer. Every park road typically open by month's end. Wildflowers begin in the valley. Long daylight, warm days, cool nights.Read June → |
| July→ |
Packed
100% of peak · 732K visits
|
Ideal
77°F / 42°F (25°C / 6°C) · 1.02″ precip
|
Full
Composite access score · 100/100
|
Peak month. Triple-the-spring crowds, full operations, wildlife everywhere. Afternoon thunderstorms common in the high country (NPS Grand Teton weather).Read July → |
| August→ |
Packed
92% of peak · 672K visits
|
Ideal
76°F / 40°F (24°C / 5°C) · 1.28″ precip
|
Full
Composite access score · 100/100
|
Still very busy. Bug pressure easing in the valley. Climbing-season prime in the range. Smoke from regional wildfires possible.Read August → |
| September→ |
Busy
77% of peak · 564K visits
|
Ideal
66°F / 34°F (19°C / 1°C) · 1.64″ precip
|
Full
Composite access score · 100/100
|
Strong shoulder. Crowds drop from August, elk rut starts late month (NPS elk page), aspens turn gold mid-to-late September at valley elevation.Read September → |
| October→ |
Quiet
34% of peak · 248K visits
|
Rough
51°F / 25°F (11°C / -4°C) · 6.5″ snow
|
Full
Composite access score · 90/100
|
Quieter but variable. Teton Park Road typically closes to cars by November 1 — confirm on the NPS Grand Teton page. Early snow common; aspens fade.Read October → |
| November→ |
Empty
7% of peak · 50K visits
|
Harsh
35°F / 14°F (2°C / -10°C) · 23.5″ snow
|
Mostly open
Composite access score · 65/100
|
Crowds collapse. Inner Teton Park Road closed to cars; through-routes plowed. Winter sets in fast at this elevation.Read November → |
| December→ |
Empty
7% of peak · 49K visits
|
Harsh
24°F / 4°F (-4°C / -16°C) · 39.9″ snow
|
Partial
Composite access score · 55/100
|
Quietest month. Deep winter. Inner park roads closed to cars; cross-country skiing and snowshoeing on the snow-covered roadbeds.Read December → |
Formula: 100 − (this month's visits ÷ park's peak month visits) × 100. Each park scored against its own peak, not against other parks.
Source: NPS Visitor Use Statistics Data Package 2025, Recreation Visits (TRV), 5-year monthly mean (2021-2025). Reproduce these numbers on the NPS IRMA Stats portal.
Reading it: July at Grand Teton reads 0 (peak). November reads 93 (nearly empty). A 50 means about half the park's peak crowd.
Formula: weatherScore = round(max(0, min(100, dayComfort − precipPenalty − snowPenalty − freezePenalty))). The piecewise day-comfort function is continuous at every boundary.
max(10, (tmax − 20) × 2) (cold tail);
50–60°F → 60 + (tmax − 50) × 4 (ramp to 100);
60–78°F → 100 (plateau);
78–85°F → 100 − (tmax − 78) × 5 (ramp to 65);
> 85°F → max(30, 65 − (tmax − 85) × 5) (hot tail).
max(0, prcpIn − 1.5) × 8 — kicks in above 1.5 in / month.snowIn × 2.5.max(0, 32 − tmin) × 1.5 when tmin < 32°F.Source: NOAA NCEI U.S. Climate Normals 1991-2020, station Moran 5WNW HCN, WY (USC00486440, 6,805 ft).
Caveat: Moran 5WNW HCN sits inside the park at ~6,805 ft, on the valley floor north of Jackson Lake. These numbers represent the Teton valley floor (Moose, Jenny Lake, Colter Bay corridor — most of where visitors actually go). Higher elevations in the range (Lupine Meadows, Cascade Canyon, Paintbrush Divide) run several degrees cooler and substantially snowier; the highest peaks hold snow year-round. NPS notes snow and frost are possible any month at park elevation.
Formula: For each named park road, count it open if its typical operating window covers that month. Score = round((sum of weights of open roads / sum of all weights) x 100). Where a park has a partial winter access mode, the profile documents that assumption in its access notes.
Route weights at Grand Teton:
Editorial methodology — the route weights themselves are author-curated, sourced from data/processed/operations/road_windows.csv and the park's own access caveats below the score table.
Caveat: The score reflects wheeled-vehicle road access only. Backcountry, hiking, lodging, shuttle, and other service availability are not directly included unless the park profile states otherwise.
A combined "best month" number forces a weighting — how much do you care about crowds vs. weather vs. access? Those weights are personal. A photographer optimizing for golden light weights differently than a parent locked to school break weights differently than a winter visitor with a 4WD. We show the inputs and let you decide. Use the per-month grid above to navigate to a deeper page.
Crowd-free trails, full operations, or value-and-solitude. Each card points at a different month — pick the one that fits what you're actually after.
Visits drop sharply once schools restart, and the second half of September into early October combines aspen color, the elk rut, and full road access. Confirm current Teton Park Road closure timing on the NPS Grand Teton conditions page before basing a trip on it — the inner road typically closes by November 1 but exact dates vary year to year.
Read the September deep-dive →The Teton Park Road inner section typically opens to cars in late May and closes by November 1 — check the official NPS Grand Teton page for current dates. Within that window every district is reachable, Jenny Lake shuttle runs (also seasonal), Jackson Lake Lodge / Jenny Lake Lodge / Colter Bay are in full swing, and ranger programs are active. June balances wildflowers against late-opening inner roads; September balances aspen color against earlier evenings.
Read the July deep-dive →Quietest stretch of the year. Inner Teton Park Road and Moose-Wilson Road close to cars; the US-89 / US-191 / US-26 through-corridor stays plowed and accesses Moose, Moran Junction, and Colter Bay (winter lodging is limited in the park itself — most visitors base in Jackson). Cross-country skiing and snowshoeing on the snow-covered Teton Park Road is the signature winter experience. Frigid nights, short daylight, and active wildlife on the plowed corridor.
Read the winter guide →If summer is your only window, target late August — school-restart pulls crowds below July-August peak and afternoon storms have begun easing.
Grand Teton's summer problem is crowd density stacked on top of wildlife exposure: July is the peak month, August is just behind, and the family-friendly trailheads at Jenny Lake, Taggart Lake, and String Lake fill by mid-morning on busy days. For families locked to school breaks, June and late August are the cleanest summer windows. June catches wildflowers, longer daylight, and lower visit numbers, but the inner Teton Park Road typically only opens late in the month and afternoon storms ramp up. Late August into early September catches the school-restart pull, lower bug pressure, and most operations still in full swing. Bear-safety planning is the non-negotiable family fundamental: NPS requires bear spray for backcountry travel and recommends it on every front-country trail. Stay 100 yards (300 ft) from bears and 25 yards (75 ft) from moose, bison, and elk (NPS safety).
Closest hub by far: Jackson Hole Airport (JAC) is inside Grand Teton National Park — the only commercial airport inside an NPS unit. ~15 min drive to Jackson, ~25 min to Moose. Other options: Idaho Falls (IDA, ~1:45 west), Bozeman (BZN, ~4:00 north via Yellowstone in summer), Salt Lake City (SLC, ~4:30 south). Rental car is effectively required — there's no in-park bus connecting the lodges to trailheads. From the U.K. and Europe, most travelers connect via SLC, Denver, or Minneapolis. Once at the park, Jackson Hole's START bus runs a limited summer-season route into Teton Village and parts of Grand Teton; consult START Bus for current schedules.
Jackson is the year-round gateway (~12 miles south of Moose) and has the deepest lodging selection. In-park lodges — Jackson Lake Lodge, Colter Bay Village, Jenny Lake Lodge, Signal Mountain Lodge — are concessioner-run and seasonal (roughly mid-May through early October); booking opens far in advance through Grand Teton Lodge Company and Signal Mountain Lodge. Teton Village (south end, near the Jackson Hole tram) is the winter-ski base and has summer overflow. Verify current rates and open dates on the operator pages — they change year to year.
Grand Teton has both grizzly and black bears throughout the park, and NPS requires bear spray for any backcountry travel (NPS safety). Recommended for every hike, even short popular ones. Spray runs roughly $40-$55 at the Moose visitor center, Dornan's in Moose, and outdoor stores in Jackson — rent rather than buy if you're flying in (airlines won't carry it). Practice removing the safety clip with kids before any hike. Keep kids close on trails, never approach wildlife for photos, and respect the 100-yard / 25-yard distance rules. Moose are common at willow flats and in Moose itself and are particularly dangerous in fall.
From late June through September, afternoon convective thunderstorms are common in the high country. NPS recommends starting alpine hikes (Cascade Canyon, Paintbrush Divide, Surprise and Amphitheater Lakes) at sunrise and being off exposed ridges by early afternoon. Valley trails (Taggart Lake, String Lake, Schwabacher Landing, Jenny Lake) are less exposed but still warrant rain gear in afternoon. Check the NWS Jackson forecast and the NPS Grand Teton conditions page the morning of any alpine plan.
Visitors of all ages can earn a Junior Ranger patch at the Craig Thomas Discovery and Visitor Center in Moose, Colter Bay Visitor Center, or Jenny Lake Visitor Center; activities scale with age. Booklet is a small fee at the visitor center desk — confirm current price on arrival. Takes 2-4 hours of in-park activities. Grand Teton also has a Young Naturalist Program at Colter Bay during summer that complements the Junior Ranger booklet for kids who want more structured time.
The Jenny Lake Boating shuttle (concessioner; not free, not NPS-run) ferries hikers from the East Boat Dock to the West Boat Dock — shaving ~5 miles of round-trip walking off the Hidden Falls / Inspiration Point hike. From the West Dock it's about a mile up to Hidden Falls and another half-mile up to Inspiration Point, with a real elevation pitch. Operates seasonally — typically late spring through early fall; confirm current schedule and rates on the Jenny Lake Boating page.
Jenny Lake, String Lake, Taggart Lake, and the Lupine Meadows trailheads fill before mid-morning on busy summer days. NPS does not run an in-park shuttle for trailhead access. Arrive at popular trailheads at sunrise during July and August or plan around mid-afternoon return windows. The Moose-Wilson Road in particular has limited pullouts and is closed to RVs and trailers — small cars and bikes only.
Grand Teton's signature light is sunrise on the Teton range from Schwabacher Landing, Oxbow Bend, and the Snake River Overlook, with a second window at last light from the valley side.
Grand Teton is one of the most photographed ranges in the lower 48 because the peaks rise directly from the valley floor with no foothills — you get the full 7,000 ft of vertical relief in a single frame. Best light is at sunrise: the east face of the range catches first light while the valley sits in shadow. The classic foreground compositions — Snake River bend at Snake River Overlook (Ansel Adams 1942 location), reflections at Oxbow Bend, beaver dam reflections at Schwabacher Landing, Mormon Row barns at sunrise with the range behind — all work best in the first hour after sunrise. Aspens turn gold mid-to-late September at valley elevation and a week or two earlier higher up. Winter sunrises (December through March) bring frost on the cottonwoods at Schwabacher and Oxbow, often the best months for photography if you can tolerate the cold.
| Date | Sunrise | Sunset |
|---|---|---|
| March 21 (vernal equinox) | 7:32 AM | 7:38 PM |
| June 21 (summer solstice) | 5:38 AM | 9:01 PM |
| September 21 (autumnal equinox) | 7:08 AM | 7:18 PM |
| December 21 (winter solstice) | 7:53 AM | 4:57 PM |
Sunrise alpenglow on the Teton range with the Snake River curving through the foreground. Cottonwoods have grown to partially obscure Adams's 1942 composition, but the overlook still produces a defining Tetons image.
Beaver dams along the Snake produce mirror reflections at sunrise. Access road typically closes in winter; check the NPS Grand Teton conditions page.
Mount Moran rises directly over a sweeping bend in the Snake. Aspens along the bend turn gold mid-to-late September. Sunrise light hits Moran first while the river sits in shadow.
Moulton barns frame in front of the Teton range. Best at sunrise in summer (the range catches light first); after a fresh snow in winter the contrast is even stronger.
Aspens turn gold along Schwabacher, Oxbow Bend, and the Snake River corridor mid-to-late September; higher elevations a week or two earlier. Roughly the same window as the elk rut.
Grand Teton is a designated International Dark Sky Park. The east side of the park (Mormon Row, Schwabacher) reads darker than the lakes side because of Jackson light spill. Avoid full-moon weeks.
Average recreation visits at Grand Teton National Park, calendar order. Each bar is normalised to the park's peak month — taller bar, busier month. Tap a row to read the park-month page.
| Month | Crowd vs peak month | Avg visits (5-yr) | % of peak | Band | What's actually happening |
|---|---|---|---|---|---|
| JanuaryJan | 57,211↓ 50,745 latest | 8/ 100 | Lowest | Quiet month. Most through-routes plowed; inner Teton Park Road closed to cars. Deep snow, frigid nights, short days; cross-country skiing the snow-covered inner road. | |
| FebruaryFeb | 55,933↓ 53,580 latest | 8/ 100 | Lowest | Still quiet. Through-routes open; inner park road remains a winter trail. Cold but lengthening days; classic Teton winter photography from US-89/26/191 pullouts. | |
| MarchMar | 64,755↓ 64,716 latest | 9/ 100 | Lowest | Crowds remain low. Through-routes plowed. Snow lingers on trails; valley nights well below freezing. Confirm winter-trail conditions on the NPS Grand Teton page. | |
| AprilApr | 75,333↑ 77,629 latest | 10/ 100 | Low | Pre-shoulder. Through-route corridor reliable; Teton Park Road inner section still closed to cars. Lakes ice-covered, trails muddy or snowy. | |
| MayMay | 305,741↑ 341,521 latest | 42/ 100 | Moderate | Spring ramp. Teton Park Road typically reopens to cars late in the month — confirm dates on the NPS Grand Teton page. Snowmelt, bears active, mud season. | |
| JuneJun | 632,518↑ 680,406 latest | 86/ 100 | Peak | Heavy ramp into summer. Every park road typically open by month's end. Wildflowers begin in the valley. Long daylight, warm days, cool nights. | |
| JulyJul | 732,380↑ 787,186 latest | 100/ 100 | Peak | Peak month. Triple-the-spring crowds, full operations, wildlife everywhere. Afternoon thunderstorms common in the high country (NPS Grand Teton weather). | |
| AugustAug | 672,439↑ 735,593 latest | 92/ 100 | Peak | Still very busy. Bug pressure easing in the valley. Climbing-season prime in the range. Smoke from regional wildfires possible. | |
| SeptemberSep | 564,320↑ 617,970 latest | 77/ 100 | High | Strong shoulder. Crowds drop from August, elk rut starts late month (NPS elk page), aspens turn gold mid-to-late September at valley elevation. | |
| OctoberOct | 247,505↑ 281,020 latest | 34/ 100 | Moderate | Quieter but variable. Teton Park Road typically closes to cars by November 1 — confirm on the NPS Grand Teton page. Early snow common; aspens fade. | |
| NovemberNov | 50,017↑ 56,377 latest | 7/ 100 | Lowest | Crowds collapse. Inner Teton Park Road closed to cars; through-routes plowed. Winter sets in fast at this elevation. | |
| DecemberDec | 49,334↑ 53,905 latest | 7/ 100 | Lowest | Quietest month. Deep winter. Inner park roads closed to cars; cross-country skiing and snowshoeing on the snow-covered roadbeds. |
Grand Teton's September monthly mean (~77% of July's peak) blends a busy first week — schools just back, weather still summer-like, full operations — with a much quieter second half once aspens turn and the elk rut begins. We don't yet publish weekly NPS counts on this page; when we do, the September curve will show the late-month drop explicitly. Treat the headline 'best month' recommendation as a monthly-mean call.
NOAA climate normals 1991-2020 for the station closest to park headquarters. Use it as a planning floor, not a forecast — and read the elevation caveat below.
| Month | Temperature range (°F) | High | Low | Precip (in) | Snow (in) | Verdict |
|---|---|---|---|---|---|---|
| January | 24°°F high | 1°°F low | 2.90inches | 39.5inches | Harsh cold | |
| February | 30°°F high | 4°°F low | 2.31inches | 28.2inches | Harsh cold | |
| March | 39°°F high | 12°°F low | 2.34inches | 22.0inches | Cold | |
| April | 46°°F high | 21°°F low | 2.16inches | 11.7inches | Cold | |
| May | 56°°F high | 31°°F low | 2.36inches | 2.9inches | Shoulder | |
| June | 67°°F high | 37°°F low | 1.75inches | 0.3inches | Shoulder | |
| July | 77°°F high | 42°°F low | 1.02inches | 0.0inches | Warm | |
| August | 76°°F high | 40°°F low | 1.28inches | 0.0inches | Warm | |
| September | 66°°F high | 34°°F low | 1.64inches | 0.4inches | Shoulder | |
| October | 51°°F high | 25°°F low | 1.92inches | 6.5inches | Cold | |
| November | 35°°F high | 14°°F low | 2.61inches | 23.5inches | Harsh cold | |
| December | 24°°F high | 4°°F low | 3.10inches | 39.9inches | Harsh cold |
Annual recreation visits at Grand Teton National Park, 2015–2025. Hover any bar to compare; the chart is the same record the agency itself publishes.
Roads, lodges, entrances. The seasonal pattern that turns a good plan on paper into a workable one in the field. Verify with NPS before you travel — these change.
Open year-round. This is the spine of Grand Teton access — it runs along the east side of the park from Moose to Moran Junction to Flagg Ranch and is plowed all winter. It's how visitors reach the park from Jackson (south) and from Yellowstone (north) when the South Entrance Road is open. Confirm current conditions and any temporary closures on the NPS Grand Teton conditions page before driving in winter storms.
The inner road from Moose to Jackson Lake Junction — past Jenny Lake, the Cathedral Group turnouts, and Signal Mountain — typically closes to cars from November through late April or early May and reopens to vehicles in May. During the shoulder edges it often opens to non-motorized use (cycling, skating) before reopening to cars. Exact dates vary year to year; confirm current status on the NPS Grand Teton conditions page before planning a trip around it.
Narrow, partly unpaved south-end road from the Moose entrance toward Granite Canyon and the south boundary. NPS closes it to cars in winter and may close sections during the year for wildlife (bears feeding on hawthorn berries in fall, moose). Not suitable for RVs or trailers. Confirm current status on the NPS Grand Teton conditions page.
The Jenny Lake Boating shuttle runs from the East Boat Dock to the West Boat Dock for hikers heading up to Hidden Falls, Inspiration Point, and Cascade Canyon. It's a paid concessioner service (not the same as NPS-run shuttles at Zion or other parks). Operates seasonally — typically late May or early June through late September. Confirm current schedule and rates on the Jenny Lake Boating page before counting on it.
Grand Teton has both grizzly and black bears across the park. NPS requires bear spray for any backcountry travel and recommends it on all front-country trails. NPS distance rules: stay at least 100 yards (300 ft) from bears and wolves, and at least 25 yards (75 ft) from moose, bison, and elk (NPS safety). Moose are particularly dangerous in fall during the rut and any time when calves are present. Most wildlife conflicts in the park involve people getting too close for photographs.
Grand Teton does not require a park-entry reservation or timed-entry permit. The standard 7-day vehicle pass is set by NPS and is per vehicle, not per person — verify current rates on the NPS Grand Teton fees page. A single pass covers both Grand Teton and Yellowstone if purchased as the combined product (or the America the Beautiful Annual Pass covers both). The Senior Pass covers U.S. citizens 62+.
In-park lodging is concessioner-run and seasonal. Jackson Lake Lodge, Colter Bay Village, Jenny Lake Lodge, and Signal Mountain Lodge operate roughly mid-May through early October — exact open and close dates vary year to year. Books months ahead for July-August through Grand Teton Lodge Company and Signal Mountain Lodge. Most visitors base in Jackson (south of the park, year-round) or Teton Village (south, mostly winter-ski). NPS campgrounds (Gros Ventre, Jenny Lake, Colter Bay, Signal Mountain) operate seasonally — see NPS Grand Teton campgrounds.
The park's North Entrance / Flagg Ranch sits on the John D. Rockefeller, Jr. Memorial Parkway connecting Grand Teton to Yellowstone's South Entrance. The corridor is open in summer to cars and closes seasonally for snow — Yellowstone's South Entrance Road typically closes in early November and reopens in late April or early May. Grand Teton's east-side US highways stay open all winter and reach Flagg Ranch year-round, but the connection into Yellowstone proper is winter-only by snowcoach or snowmobile. Confirm current status on the NPS Yellowstone roads page before planning a winter loop.
Grand Teton's Junior Ranger program lets kids work through an age-tiered activity booklet, get sworn in by a ranger, and earn a patch. Confirm the current booklet fee at the desk on arrival; a free PDF version is also available on the NPS Grand Teton site. The program scales — younger kids draw and observe, older kids write and identify, and the geology and wildlife chapters give middle-schoolers a real science angle. Grand Teton also runs a Young Naturalist Program at Colter Bay during summer for kids who want a longer, more structured guided experience.
Colter Bay RV Park (in-park, full-hookup, reservable, seasonal) is the main RV anchor; the inner Teton Park Road and Moose-Wilson Road are the operational constraints.
Grand Teton is workable for RVs but with two specific constraints. First, Moose-Wilson Road is closed to RVs and trailers — it's narrow, partly unpaved, and explicitly off-limits to large vehicles per NPS rules. Second, the inner Teton Park Road is closed to cars (and therefore to RVs) from roughly November through late April; the through-highway corridor (US-89 / US-191 / US-26) along the east side of the park stays plowed and open year-round. Inside the park, Colter Bay RV Park is the main full-hookup anchor (reserved through the concessioner), operating roughly mid-May through late September. Headwaters Campground & RV Sites at Flagg Ranch (north end of the parkway between Grand Teton and Yellowstone) is the second in-park option. NPS-run campgrounds (Gros Ventre, Signal Mountain, Jenny Lake, Colter Bay tent area) accept RVs at varying length limits but offer no hookups; Jenny Lake is tent-only. Jackson and Teton Village have several private RV parks within ~15 miles.
Colter Bay RV Park has full-hookup sites (reservable through the concessioner). Headwaters Campground & RV Sites at Flagg Ranch (on the parkway between Grand Teton and Yellowstone) also has full-hookup sites. NPS-run Signal Mountain, Gros Ventre, and Colter Bay (tent loops) have no hookups. Jenny Lake is tent-only.
Inside the park: Colter Bay and Signal Mountain have dump stations available to all park campers (may close in shoulder seasons). Outside the park: most Jackson and Teton Village RV parks offer dump service to non-guests for a fee — call ahead.
There is no in-park visitor shuttle that connects RV campgrounds to trailheads — visitors typically tow a small car or drive the rig to trailhead lots. Jenny Lake, String Lake, and Taggart Lake parking fills before mid-morning on summer days, so smaller vehicles are the practical choice. For the Cathedral Group / Cascade Canyon day hike, the Jenny Lake Boating shuttle ferries hikers across the lake from the East Boat Dock (paid concessioner). The START Bus system runs a limited summer-season route into parts of Grand Teton from Jackson and Teton Village — consult START Bus for current schedules.
Crowd numbers on this page are the Recreation Visits column from the NPS Visitor Use Statistics Data Package, 2025. Monthly figures are five-year arithmetic means (2021-2025) against each park's own peak month. We do not compare parks against each other for the crowd score — only against themselves.
Weather numbers are NOAA NCEI U.S. Climate Normals 1991-2020, drawn from the Moran 5WNW HCN, WY station (USC00486440). The station sits at 6,805 ft; the elevation caveat above the weather table explains where this misreads the higher districts.
Access notes are an independent summary of NPS operating posture. We do not republish NPS pages; we link them. Conditions change — confirm road status, reservation requirements, and lodging windows on https://www.nps.gov/grte/index.htm before travel.
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