Overview The Dillon Field Office is unable to make reservations for you. Please call Recreation.gov (877-444-6777) to book a reservation or book online. Campsites are available for reservation for the Peak-Season times of May 1st through September 15th. All sites are first-come-first-serve from September 16th through April 30th. Trapper Springs Campground is adjacent to the lower Madison River and provides good access for camping, fishing and floating. The campground has 15 camp sites, 9 available for reservations. There is no boat launch available at this site, but there are several in the vicinity. The campground serves as a great central location to access the lower Madison River. The day use area has a large pavilion with parking for 20 vehicles. The pavilion can be reserved for groups ($50/day). The campground has 15 camping sites with two accessible vault toilets. Organized Group permits are required for groups larger than 15 people. Recreation The Madison River is well known for its robust trout fishery. The lower Madison River is a very popular destination for non-angling floaters (tubers) during the warm summer months.
Source: rec_gov · last verified 2026-05-14