Pacific Northwest Loop
Rainforest, wild coast, a glaciated volcano and the 'American Alps', all within a few hours of Seattle.
Best time to visit · Washington
Best Time to Visit North Cascades National Park
The 'American Alps': jagged peaks, hundreds of glaciers and turquoise lakes with a fraction of the crowds.
The best time to visit North Cascades National Park is July–September. It's busiest in July through September. Avoid November through April, when snow closes roads, trails or services.
Month by month
Best monthsJul–Sep
Best valueJul–Sep
BusiestJul–Sep
Established1968
North Cascades by season
Winter Poor
The North Cascades Highway (State Route 20) closes over the passes, usually from November to April or May. The park's interior is effectively off-limits except to experienced ski-mountaineers.
Spring Poor
The highway reopens in late spring once plows clear avalanche debris. Valleys green up, but high trails stay snowbound into July.
Summer Prime
The best and busiest time, though 'busy' here is quiet by national park standards. Trails clear in July and Diablo Lake glows turquoise from glacial flour.
Fall Good
Late September into early October brings golden larches along the highway near Washington Pass and Maple Pass, just outside the park boundary.
What to do
- Stop at the Diablo Lake Overlook
- Hike Cascade Pass Trail
- Walk Thunder Knob for lake views
- See the golden larches at Maple Pass Loop (late Sept)
- Boat to Stehekin on Lake Chelan
Local tip
Most visitors see the park from State Route 20. For the real backcountry, hike Cascade Pass or take the boat up Lake Chelan to Stehekin.
Good to know
North Cascades has more glaciers than any other U.S. national park outside Alaska, and it's one of the least-visited parks in the lower 48.
Before you go: No entrance fee. State Route 20 has a seasonal winter closure; check WSDOT for opening dates. Check current conditions on nps.gov.
Getting there
Closest major airport: Seattle–Tacoma (SEA), about 2.5 hours.
Nearby national parks
Approximate driving distance. Check a map for exact routes.
Where to stay
North Cascades month-by-month ratings
Road trips with North Cascades
Questions about visiting North Cascades
When is the best time to visit North Cascades National Park?
The best time to visit North Cascades National Park is July–September. It's busiest in July through September. Avoid November through April, when snow closes roads, trails or services.
What is the worst time to visit North Cascades National Park?
November through April are the weakest time, when snow closes roads, trails or services.
When is North Cascades National Park most crowded?
Crowds peak in July through September. July through September offer the best balance of good conditions and fewer people.
Is North Cascades National Park worth visiting in winter?
The North Cascades Highway (State Route 20) closes over the passes, usually from November to April or May. The park's interior is effectively off-limits except to experienced ski-mountaineers.
Do you need a reservation for North Cascades National Park?
No entrance fee. State Route 20 has a seasonal winter closure; check WSDOT for opening dates. Always check the official NPS page for the current year's rules.
What is the closest airport to North Cascades National Park?
The most convenient airport is Seattle–Tacoma (SEA), about 2.5 hours.
How many days do you need at North Cascades National Park?
Most road trips spend 1 to 2 days here.
More in Pacific Northwest · National parks in Washington · Season calendar
Last reviewed October 4, 2026. Ratings are editorial. Rules and road openings change each year, so confirm on the official NPS site before you go.