Lake · North Cascades National Park
Doubtful Lake
9.4 mi round trip3,076 ft gainHardDay hike: No permitOvernight: Reservation
Get alerts for this hikePermits and reservations
Day hikeNo permit
Day hikes in the national park need no permit or reservation.
OvernightReservation
Every overnight stay needs a wilderness permit, year-round. Reserve on Recreation.gov or walk up in Marblemount.
Permit calendar
Early-access lotteryEarly March
Winners bookLate March to April
General reservationsLate April
Walk-up permitsMid-May to early October
North Cascades National Park rules from the National Park Service. Exact dates are set each year; past years followed this pattern. Always confirm with the land manager before you go.
About the trail
Distance9.4 miRound trip, out and back
Elevation gain3,076 ftTotal climb, round trip
Lake elevation6,084 ftFrom elevation data
Overview
Doubtful Lake is a lake reached by a 9.4-mile round trip from Cascade Pass Trailhead. The route follows Cascade Pass Trail, then Sahale Arm Trail, then Doubtful Lake Trail to the shore.
Photos from hikers
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What you need
Parking and passes
National park trailheads here have no entrance fee. Check posted signs for any parking rules.
Getting there
The hike starts at Cascade Pass Trailhead. Save directions offline before you leave, since mountain roads often lose cell service.