Northwest of White Sulfur Springs in the Lewis - Clark National Forest, the Bald Hills ATV Trail (#345) is a 4 mile route open to off-road motorcycle trails riding.
Directions to the trailhead:
Go 18 miles north of White Sulfur Springs on US HWY 89. Turn left (west) onto CR 119 (Sheep Creek Rd.) Stay on the road for 22.5 miles (it turns into NFD 586.) Turn right (north) on S. Fork Tenderfoot Rd. and go 7.25 miles to a right on an unmarked road. Stay left at 1/2 mile and left at the next split 1/8 mile further. The trail is on the right 1/3 mile past the last road split. (Trail is 3/4 mile past the intersection of S. Fork Tenderfoot Rd and unmarked road.)
Overall, Bald Hills ATV Trail is the 11th most popular dirt bike trail of all 30 dirt biking rides in Montana.