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Washington · Rock Climbing
Marblemount sits at the edge of the North Cascades and serves as the main gateway for climbers heading into some of the most committing alpine terrain in the lower 48.
25 spotsUpdated weeklyFree to access
View on mapRock Climbing · 25 spots
Marblemount sits at the edge of the North Cascades and serves as the main gateway for climbers heading into some of the most committing alpine terrain in the lower 48. The routes listed here are not sport crags you can walk up to in approach shoes — they are glacier-approach, multi-pitch objectives on peaks like Eldorado Peak, Forbidden Peak, and the routes of Boston Basin, where you'll find lines like the East Ridge, Northeast Ridge (1963 Route), and the Torment-Forbidden Traverse. The climbing is predominantly alpine rock: ridges, buttresses, and faces that require moving over snow and ice to reach, then transitioning to rock once you're on route. The Direct Southwest Buttress, Klawatti Peak SW Buttress, and the various North and West Ridge routes reflect the style here — sustained, committing, and rarely crowded compared to more accessible ranges. Sahale Glacier adds a glaciated dimension that demands crampons and rope work before you ever touch rock. If you're coming from a gym or a single-pitch crag background, these routes are a significant step up. If you're an experienced alpine climber looking for a concentrated area with serious objectives across a range of ridge and face routes, the terrain around Marblemount delivers exactly that.
Most routes — including the Boston Basin objectives, Forbidden Peak, and Eldorado Peak — are in condition from mid-July through mid-September in a typical year. Early season means more snow on the approaches and potentially better consolidated conditions on glaciated sections like Sahale Glacier, but also higher avalanche and bergschrund risk. Late August and early September often offer the most stable weather windows and the most reliable rock conditions on routes like the East Ridge Direct and Torment-Forbidden Traverse.
Yes. The climbing areas around Marblemount fall within North Cascades National Park and the Glacier Peak Wilderness, both of which have overnight permit requirements for backcountry camping. Boston Basin, which serves as the base for many of the listed routes, requires a backcountry permit for overnight stays. Day trips from the trailhead do not require a permit, but most of these objectives are not realistic as single-day efforts. Check current requirements with the North Cascades National Park Service before your trip, as permit systems and quotas can change between seasons.
South Ridge
~1 min drive
A worthwhile stop near Washington.
Forbidden Peak
~3 min drive
Serious alpine climbing in Washington's North Cascades with exposure and commitment.
Torment-Forbidden Traverse
~1 min drive
A worthwhile stop near Washington.
Boston Basin
~4 min drive
Remote alpine granite climbing in Washington's North Cascades.
South Ridge
~2 min drive
A worthwhile stop near Washington.
Main Peak
~4 min drive
Versatile Washington climbing area with routes for multiple ability levels.
Northwest Face
~3 min drive
A worthwhile stop near Washington.
Boston Basin
~5 min drive
Remote alpine climbing in Washington's North Cascades with multi-pitch routes.
West Ridge
~3 min drive
A worthwhile stop near Washington.
Upper Skagit Valley
~22 min drive
North Cascades climbing in Washington's Upper Skagit Valley with varied rock and routes.
North Ridge
~3 min drive
A worthwhile stop near Washington.
Ryan's Wall
~22 min drive
Washington climbing area with varied routes for developing climbers.
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
Rock climbing
Marblemount, Washington
A standard alpine rack is the baseline: a set of nuts, a partial set of cams, slings, and a 60-meter rope. Because most routes involve glacier travel to reach the rock — particularly on Sahale Glacier and the approaches to Eldorado Peak and Forbidden Peak — crampons, an ice axe, and a crevasse rescue kit are not optional. Helmets are strongly advised given the loose rock common on many North Cascades ridges. For the Torment-Forbidden Traverse specifically, plan for a longer day and carry bivy gear as a contingency.
The routes listed here range from moderate alpine (West Ridge, South Ridge lines) to serious and committing (Torment-Forbidden Traverse, East Ridge Direct, Tepeh Towers). The technical rock difficulty on many routes is not extreme by pure rock-climbing standards, but the combination of glacier approach, route-finding, altitude, and commitment makes them appropriate for climbers with prior alpine experience. If you haven't led on glacier-approach terrain before, Boston Basin is a reasonable place to start — but come with a partner who has done it.
Marblemount itself is a small town on Highway 20, and the drive to trailheads for Boston Basin, Eldorado Peak, and Forbidden Peak typically takes 30 to 60 minutes from town depending on road conditions. The hike to Boston Basin from its trailhead is roughly 3.5 miles with significant elevation gain, and most parties camp there before attempting routes. Eldorado Peak's approach is similarly demanding. Plan to arrive at the trailhead early — ideally before 7 a.m. — to allow time for the approach, the climb, and a safe descent before dark.
