Black Hills National Forest · South Dakota, Wyoming
Centennial Bypass 89b
1.7 mi of trail, end to end · Iron Mountain Trailhead (Trail #16): 1.4 mi one way in the Service's write-up · native material surface · trail No. 89B · trail class 3 · typical grade 12-20% · tread 18-24 inches wide · hiking, horse
Picnic areas
Along the way Iron Mountain Picnic Area
Trailhead Iron Mountain Trailhead (Trail #16) Drive there
Iron Mountain Trailhead (Trail #16) 1.4 mi one way · the Forest Service's write-up
The 1.4 mile (one way) Iron Mountain Trail provides beautiful views of the Norbeck Wildlife Preserve and the Black Elk Wilderness. A very unusual feature can be seen from the trail near the Iron Mountain Picnic Ground- follow the signs to "Turtle Rock." There is no water along this trail.
This trailhead on fs.usda.gov
Every trail in Black Hills National Forest
About this trail's facts
The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.
