TrailExplore Raspberry Island
Bog boardwalk grit test: steady footing, slippery planks, insect-eating plants. One mile of tactical observation.
Rock Harbor (East End of Isle Royale) • Isle Royale National Park
Feldtmann Loop Section 2 is a brutal 10.3-mile ridge traverse with zero water sources and dense overgrown vegetation that feels like swimming through tall grass. You'll climb steeply to Feldtmann Ridge for views of Feldtmann Lake, Grace Harbor, and Rock of Ages Lighthouse, pass the halfway-point Feldtmann Fire Tower, then descend to Siskiwit Bay Campground. This is backpacker grit—relentless, remote, and rewarding for those who earn it.
Strenuous
Feldtmann Ridge offers panoramic views of the western wilderness. The fire tower marks the halfway point with 360-degree vistas. Descend through old logging road overgrown with tall grass to reach Siskiwit Bay Campground with dock access.
• The fire tower at the halfway point is a demoralizing false summit—it marks progress, not the end. Keep mental pace up. • The descent through overgrown logging road is disorienting and slow. Expect to move 1-2 mph through dense grass. • Camp at Feldtmann Lake Campground the night before, arrive early, and start climbing by 6 AM to summit ridge before afternoon exposure peaks. • Pair this section with other Feldtmann Loop sections for a multi-day epic (Sections 1, 3, 4 available). • Clear day views of Rock of Ages Lighthouse are gold—if clouds roll in, the ridge payoff vanishes.
Late May through September
Not suitable for young children due to steep climbing, rocky terrain, and no water sources. Teenagers (14+) with backcountry experience and strong fitness can manage with adult supervision. The dense vegetation and lack of water make this a commitment, not a casual family stroll.
Backpackers respect this trail for its remoteness and ridge payoff, but they don't sugarcoat the pain: the steep climb is relentless, water is a critical planning issue, and the overgrown descent feels longer than it is. Those who prepare (plenty of water, early start, map) and embrace the grit leave with the views and solitude they earned.
No permit required for day hikers. Backcountry campers must register at arrival (included in park entry fee).
Ferry or seaplane required to reach Isle Royale. Ranger III and Isle Royale Queen IV operate May-September. Seaplane service (Isle Royale Seaplanes) available same season. Ferry dock at Windigo or Rock Harbor.
Steep climbing to ridge entrance creates exposure risk. Rocky and rooted terrain causes ankle twist risk. Dense overgrown vegetation near trail limits visibility and pace. The critical hazard: zero water sources means dehydration is a real threat on a 10.3-mile day. Ridge sections are exposed to wind and afternoon heat.
The trail is 18 inches wide and covered in rocks and roots. Not wheelchair or stroller accessible. Requires solid footing and mobility.
Not suitable for young children due to steep climbing, rocky terrain, and no water sources. Teenagers (14+) with backcountry experience and strong fitness can manage with adult supervision. The dense vegetation and lack of water make this a commitment, not a casual family stroll.
Feldtmann Lake Campground (start point, shelter, dock). Siskiwit Bay Campground (end point, two shelters, dock). Rainbow Cove (0.8 miles from Feldtmann Lake Campground—short detour for sunset views and lighthouse sighting). Windigo Marina (western hub, supply stop).
Backpackers respect this trail for its remoteness and ridge payoff, but they don't sugarcoat the pain: the steep climb is relentless, water is a critical planning issue, and the overgrown descent feels longer than it is. Those who prepare (plenty of water, early start, map) and embrace the grit leave with the views and solitude they earned.
" Backpackers respect this trail for its remoteness and ridge payoff, but they don't sugarcoat the pain: the steep climb is relentless, water is a critical planning issue, and the overgrown descent feels longer than it is. Those who prepare (plenty of water, early start, map) and embrace the grit leave with the views and solitude they earned."
Yes. NPS explicitly states: 'There is no water source easily accessible from this trail.' Plan to carry 3+ liters. If you run out, reach Siskiwit Bay Campground at mile 10.3 (no earlier rescue option).
Possible if you're ultra-fit and start at dawn. Most backpackers split it across two days (camp at Feldtmann Lake the night before, push to Siskiwit Bay, camp there). A single 10.3-mile day with 1,200+ feet gain and no water is survivable but punishing.
Yes. The ascent to Feldtmann Ridge is relentless and exposed. Rocky terrain, no shade. Expect 3-4 miles of sustained climbing. Trekking poles and quad strength essential.
Backcountry camping experience required. Trekking poles strongly recommended. Gaiters protect your shins from roots and vegetation. A waterproof map and compass (or GPS) are essential—trail markers exist but dense growth can obscure the way.
No bears on Isle Royale. Moose, wolves, and foxes exist but avoid humans. Maintain 100-yard distance if spotted. More realistic hazard: hypothermia from exposure on the ridge in bad weather, and disorientation in dense vegetation.
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