Prewett Creek Fishing Access Site offers a concrete boat ramp for Missouri River access located 7 miles south of Cascade, Montana, with 7 primitive campsites available for $12-$18 per night. The 2.

4-acre site features vault toilets, picnic tables, and fire rings, though boat trailer parking can be limited during busy periods. A maximum 7-day stay is enforced, and the site is open year-round.