This trail circles Devils Tower, you can find the trailhead near the visitor center.
South Dakota Trails / State Parks
Castle Trail (West)
Pickerel Lake Recreation Area
Castle Trail (East)
Buryanek Recreation Area
Sunday Gulch Trail
BHNF Trail #50: Flume Trail
Newton Hills State Park
BHNF Trail #79: Rimrock Trails
Rocky Point Recreation Area
South Side and Valley View Trails at Devils Tower National Monument
BHNF Trail #9: Harney Peak South
Lewis and Clark Recreation Area
BHNF Trail #88: Cook Lake
Spearfish Canyon Nature Area
Dakota Point Trailhead
Carson Draw Trail System (Trail #93)