Grand Teton road closures, road by road.

Every Grand Teton road on one timeline.

Two Grand Teton roads close on a schedule, the Teton Park Road and the Moose-Wilson Road, both on November 1. Other roads close based on conditions. NPS says roads close in winter for recreational use and to give wildlife corridors. On top of that schedule, the park runs multi-year construction projects that close roads, trailheads and picnic areas and add timed delays. Those change from season to season, so read the NPS road construction page for the year you are travelling and the Road Status Map for the day.

The main highway, open all winter.

The park's main roadways, US 89/191 and US 26/287, are plowed and open for winter travel from the town of Jackson to Flagg Ranch, just south of Yellowstone. That is the road past the Moran Entrance all year. NPS warns that park roads are often snow-covered and icy in winter, so use winter or all-season tires, carry tire chains for mountain passes, and keep a winter safety kit in the car.

Driving on into Yellowstone in winter is a different trip. Yellowstone's roads are closed to motorized vehicles in winter except the road from Mammoth Hot Springs to Cooke City, so from this side Flagg Ranch is as far north as the plowed highway goes. Our Yellowstone road closures page has those dates, and Yellowstone's road line is 307-344-2117.

Winter: skis and snowshoes on the closed roads.

From November 1 to April 30 the Teton Park Road between Taggart Lake Trailhead and Signal Mountain Lodge is open to non-motorized use only. It is groomed for skiing, snowshoeing, and hiking from mid-December to mid-March. Before the snow, you can bike it from November 1 until it is snow covered, and again in spring once the snow melts, until April 30. Once it is snow covered, bikes, fat tire bikes, and roller blades are not allowed. Pets are allowed on the road after November 1, and once it is snow covered, leashed pets can use the multi-use lane.

The Moose-Wilson Road is open to skiing, snowshoeing, and hiking in winter too. NPS suggests parking at the Granite Canyon Trailhead to ski or snowshoe it. Grassy Lake Road, west of Flagg Ranch in the Rockefeller Parkway, is unplowed in winter, and once NPS decides there is enough snow it opens to oversnow use by snowmobiles, skiers, snowshoers, and hikers. Antelope Flats, Deadmans Bar, Pilgrim Creek, Schwabacher, and Two Ocean roads close seasonally based on conditions, with no set dates. Our Grand Teton in winter page covers the rest of a winter trip.

How crowds follow the Teton Park Road.

Grand Teton's spring crowd waits for the Teton Park Road. April, with that road closed to cars through April 30, averages 10% of the visits of July, the busiest month. May, when it opens on May 1, jumps to 42%, and June to 86%.

Fall runs the other way. September is still 77% of July, October 34%, and November, with the Teton Park Road closed from November 1, 7%. The best time to visit Grand Teton page weighs the months, and the October guide covers the last full month the Teton Park Road is open to cars.

Common questions.

Does a government shutdown close Grand Teton's roads?

Generally, no. The National Park Service contingency plan for a lapse in appropriations says park roads, lookouts, trails, and open-air memorials will generally remain accessible to visitors during a lapse in appropriations. It also says parks will not provide regular road or trail condition updates, and that an area must be closed if access becomes a safety issue, such as weather or road conditions. The winter schedule on this page does not change, but the Road Status Map may not be kept up, so lean on WYDOT at 1-888-WYO-ROAD.

Where these facts come from

Winter closures, grooming, biking and pet rules, the conditions-based roads, the main highway, the Road Status Map, WYDOT, winter driving advice, and the Yellowstone note come from the NPS Grand Teton park roads page; the non-motorized rule and Granite Canyon parking tip from the NPS winter page. Each season's construction closures and delays are on the NPS road construction page, which we don't copy here. The shutdown answer comes from the September 2025 National Park Service contingency plan posted on the Department of the Interior shutdown page. The Grassy Lake Road and dirt-road timeline bars are our estimate from NOAA NCEI 1991-2020 snowfall normals for the Moran 5WNW station (USC00486440), not park dates. The road lines on the map are OpenStreetMap geometry between OSM nodes, routed by OSRM (© OpenStreetMap contributors, ODbL); they show where each road runs, not its closure gates. Crowd numbers are five-year monthly means (2021 to 2025) of recreation visits from the NPS Visitor Use Statistics Data Package on NPS IRMA Stats. Independent site, not affiliated with the National Park Service.