March · WA

North Cascades National Park in March.

By Nicholas Major · Last updated

North Cascades National Park in March is a winter-conditions trip, not our choice for alpine hiking or a Highway 20 through-drive. Newhalem's normal high is 49°F (10°C) and low is 35°F (2°C). Those gateway temperatures do not describe mountain snow or avalanche conditions.

NOAA's Newhalem station represents a low-elevation western gateway. These normals do not describe alpine trails, Stehekin or the east side. Zero station snowfall does not establish snow-free mountain routes.

In short

March averages 59 national-park recreation visits. That excludes Ross Lake and Lake Chelan recreation areas and does not predict traffic or parking around Newhalem and Diablo Lake.

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Plan around winter access, not the calendar's start of spring

NPS says winter conditions persist into spring. Highway 20 normally closes across the mountains for winter; do not build a March itinerary around a through-drive. Check road conditions for your intended approach before leaving.

Avalanches are common in winter and spring, including places along the highway. A mild Newhalem forecast does not establish safe mountain travel. Visitor services are limited outside the main operating season; check facility hours and carry what you need rather than relying on an open visitor center.

Consider a short forest walk at Newhalem if conditions allow

The Trail of the Cedars is a gravel loop beside the Skagit River through old-growth forest. It can be reached from the suspension bridge in Newhalem. This is a lower-elevation gateway option, not an alpine hike.

Check trail conditions before choosing it. Prepare for rain and wind, and change plans if the route is unsuitable. Newhalem averages 8.36 inches of March precipitation; that normal is not a forecast for your walking day.

Questions about March

Is March a good time to visit North Cascades National Park?

Only if you want a flexible winter-conditions trip. It is not our choice for alpine hiking or a Highway 20 crossing. Check the approach road, forecast and trail conditions; a short Newhalem forest walk may fit better if its conditions allow.

Can I drive through North Cascades on Highway 20 in March?

Do not plan on it. The mountain crossing normally closes for winter and reopens later in spring. Exact dates vary, so check official road information before fixing a route. Access to a lower-elevation stop does not mean the whole crossing is open.

Sources and limits

NOAA 1991-2020 climate normals: NEWHALEM, WA US (USC00455840), 525 feet. Normal high: 49.4°F (9.7°C); normal low: 35.0°F (1.7°C). These are long-term averages, not a forecast.

NPS Visitor Use Statistics Data Package, 2025: 2021–2025 average recreation visits for North Cascades National Park (NOCA). The March 2025 count is 10. Counts measure visits, not unique people or a day's parking pressure.

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Independent site. Not affiliated with or endorsed by the National Park Service. Data comes from the official NPS Visitor Use Statistics Data Package, 2025; editorial analysis is ours. The NPS Arrowhead and other NPS marks are not used.

Last updated · 2026-10-15