Boulder Flat Boat Ramp is a concrete raft launch facility at Boulder Flat Campground on the North Umpqua River, approximately 53 miles east of Roseburg on Highway 138.

The ramp features paved access, a changing room building with two stalls, day-use parking with extra-long spurs for boat trailers, and serves as the primary put-in for Class II-III whitewater runs on the upper North Umpqua River.

A Northwest Forest Pass is required, and the ramp is busy during spring and summer months with paddlers accessing the scenic 7-mile Boulder Flat to Horseshoe Bend section.