Feldtmann Loop
~4 days · 29.7 mi · moderate · Loop
Quick facts
What the Feldtmann Loop is known for
Isle Royale's quiet southwest loop from the Greenstone junction near Windigo: Feldtmann Lake Trail to the lake, the Feldtmann Ridge past the fire tower to Siskiwit Bay, then the Island Mine Trail back up to the Greenstone Ridge — about 30 miles. Assembled from OpenStreetMap relations 12361106, 20106874, 20106873 and 20106869; camps are evenly spaced suggestions — use the Feldtmann Lake, Siskiwit Bay and Island Mine campgrounds.
Elevation profile
Elevation ranges from 1,991 ft to 4,318 ft over 29.7 mi. Measured from OSM geometry (approximate).
- Uphill 9.4 mi · 32%
- Downhill 10.1 mi · 34%
- Flat 10.2 mi · 34%
Ridgefold breaks every route into uphill, downhill, and flat — see the full per-day breakdown in the app.
Frequently asked questions
How many days does the Feldtmann Loop take?
Most backpackers hike the Feldtmann Loop in about 4 days (3 nights out) over its 29.7 miles, though pace varies with fitness and conditions.
How much elevation gain is on the Feldtmann Loop?
The Feldtmann Loop climbs roughly 2,139 ft total — about 72 ft per mile, topping out near 1,335 ft.
Related trails
Sources & attribution
Route geometry and stats derived from OpenStreetMap (© OpenStreetMap contributors, ODbL) — source relation. Stats are approximate and may differ from official surveys; permit rules and conditions change — verify with the managing authority before your trip. Last reviewed July 2026.