Bonfield Fishing Access Site offers a concrete boat ramp on the Yellowstone River with primitive camping, vault toilets, and picnic tables available year-round. Located 1.

5 miles northwest of Miles City via Highway 489, note that RVs are not recommended due to 3 miles of minimally maintained access road and an extremely narrow bridge (8-foot maximum width); trailers are limited to 20 feet in length.

Maximum stay is 7 days, and a Montana fishing license is required.