The Devils Dome Loop is a rugged 39-mile circuit around Jack Mountain in Washington's North Cascades, featuring 11,000 feet of cumulative elevation gain across alpine meadows, old-growth forest, and exposed ridgelines. This is a challenging loop best suited for experienced backpackers comfortable with sustained steep climbing, potentially unreliable water sources, and late-season snow crossings. The route circles 9,066-foot Jack Mountain along the western edge of the Pasayten Wilderness, offering continuous views of glaciated peaks, sprawling wildflower meadows, and the opportunity for true North Cascades solitude. Most backpackers complete the loop in 3-5 days, though the brutal elevation profile rewards those who take 4+ days to fully appreciate the scenery.
The Devils Dome Loop crosses two land management areas with different permit requirements:
Pasayten Wilderness (USFS): Free self-issue wilderness permit at the trailhead. No quotas or advance reservations needed. A Northwest Forest Pass is required for trailhead parking.
Ross Lake National Recreation Area (NPS): If camping at Devil's Creek or Roland Creek campsites along Ross Lake, you must obtain a backcountry permit from North Cascades National Park. As of 2026, permits cost $10 per person plus a $6 non-refundable processing fee (free for youth 15 and under). Sixty percent of permits are available online via Recreation.gov starting April 29, 2026 at 7 AM PT. An early-access lottery runs March 2-13, 2026, giving winners first crack at reservations. Forty percent of permits are held for walk-up issuance at the Wilderness Information Center in Marblemount (first-come, first-served, day-of or day-before trips only). Reserved permits must be picked up by 11 AM on your start date or the reservation is cancelled.
Group size limits vary by campsite (4-12 people maximum). Bear canisters are not required but recommended; Devil's Creek and Roland Creek camps have bear-resistant food storage boxes. Campfires are discouraged in fragile alpine areas. Visit the NPS backcountry permits page for current regulations.
July through September is the optimal window. Snow typically clears by mid-July, though early July trips may encounter snow patches between Devils Park and Anacortes Crossing. August is ideal: snow-free trails, reliable water sources, and peak wildflower displays in the sprawling subalpine meadows. September offers fewer mosquitoes and stable weather if you're lucky, but water sources become less reliable.
Avoid June and early July unless you're comfortable with snow travel and potentially hazardous creek crossings. The Canyon Creek ford (if starting from that trailhead) runs dangerously high in spring and early summer; late summer or fall is safest. Highway 20 typically closes for winter in mid-November through April/May, making the trailheads inaccessible.
Mosquitoes can be ferocious in July and early August, particularly near water sources and at lower elevations. Bring a head net.
Water availability is one of the loop's biggest challenges. Many ridge sections are dry, requiring careful planning and extra carrying capacity. Starting counterclockwise from East Bank Trailhead:
Questionably named "Dry Creek Pass" lives up to its name. Late-season (September+) hikers should bring extra bladders or bottles and expect to carry 3-4 liters between sources. Water reliability varies year-to-year; check recent trip reports on Washington Trails Association before your trip.
Resupply: Marblemount (one hour drive west on Highway 20) is the last town before the trailhead. Stock up on supplies and pick up permits at the Wilderness Information Center there. No resupply options exist along the trail.
Canyon Creek Ford: The bridge at Canyon Creek Trailhead was destroyed in 2019 and remains out. The ford can be shin-deep in late summer but runs dangerously high and fast in spring/early summer. Only attempt during low water (late July onward). A landslide west of the crossing forces you to ford the creek to bypass it, adding to the challenge.
Exposure: Long stretches of exposed ridgeline hiking with lightning risk during afternoon thunderstorms. Start early and be off high points by mid-afternoon during unstable weather.
Trail Conditions: Expect overgrown sections, blowdowns, and rough tread, particularly on the Jackita Ridge approach if starting from Canyon Creek. Trail maintenance is inconsistent. The climb to Devils Dome features loose scree—watch your footing.
Elevation Profile: The loop's 11,000 feet of gain comes in relentless chunks. Going clockwise, the climb from Ross Lake to Devils Dome gains 5,000 feet in 6 miles. Counterclockwise spreads it out more evenly but still demands sustained effort. This isn't a loop for casual backpackers.
Wildlife: Black bears are present. Hang food properly or use a bear canister (free loaners available at Marblemount ranger station). No grizzlies, but practice good food storage regardless.
From Seattle, take I-5 north to Burlington, then SR 20 (North Cascades Highway) east through Sedro-Woolley and Marblemount. Stop at the Wilderness Information Center in Marblemount (7280 Ranger Station Rd) to pick up permits if needed.
East Bank Trailhead: Continue east on SR 20 past Ross Dam to milepost 138.2 (approximately 4.5 miles past the dam). Free parking on the north side of the highway. No services.
Canyon Creek Trailhead: Continue to milepost 141.2, about 3 miles past East Bank. Northwest Forest Pass required. Road conditions are good; no high-clearance vehicle needed on Highway 20 itself.
Highway Closure: SR 20 closes between Ross Dam (milepost 134) and Silver Star Gate (milepost 171) from mid-November through April/May for avalanche danger. Check WSDOT road conditions before traveling.
Nearest Airport: Seattle-Tacoma International (3 hours drive). Paine Field in Everett (2.5 hours) is closer but has fewer flight options.
Shuttle Options: The two trailheads are 3 miles apart via Highway 20 roadwalk. Most hikers either complete the full loop from one trailhead or arrange their own two-car shuttle. Ross Lake Resort offers a water taxi that can drop you at the base of Devils Creek Trail (expensive but cuts ~12 miles). No commercial shuttle services operate between East Bank and Canyon Creek trailheads.
Direction: Most hikers go counterclockwise from East Bank, which provides better grade on the initial climb and saves the gentler Ross Lake shoreline for the final day. Clockwise works if you want the lake as a warmup and prefer frontloading permits (camping at Devil's Creek night one). Either way, you'll earn every foot of elevation.
Campsites: Devils Park (mile 9 counterclockwise) is a popular first night—stunning meadows with Jack Mountain views. Plan camp-to-camp distances based on your fitness; the elevation profile matters more than mileage. Many experienced backpackers aim for 4 days to enjoy the scenery rather than grinding out 3 long days.
Water Strategy: Carry 3-4 liters between Devils Creek and the sources near mile 21. Tank up at every reliable source. A Sawyer Squeeze or similar filter works fine; no need for purification tablets unless water is visibly murky.
Bugs: July means mosquitoes. Bring permethrin-treated clothing, 30% DEET, and a head net. They're worst in meadows and near water. September is blissfully bug-free.
Wildflowers: Peak display runs mid-July through August. The meadows around Devils Park and McMillan Park explode with color—lupine, paintbrush, avalanche lilies, and more.
Weather: North Cascades weather is notoriously fickle. Bring full rain gear and an extra insulation layer even in August. Afternoon thunderstorms are common; plan to be off exposed ridges by 2-3 PM during unstable conditions.
Side Trips: Strong hikers can add a summit of Crater Mountain (6.4 miles round trip, 2,300 feet gain) or scramble Jack Mountain from Devils Park (Class 3, serious undertaking). Both require extra days and alpine experience.
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