River Source provides custom, small group river experiences by raft, canoe and kayak.

Yellowstone River scenic wildlife watching river tours, whitewater rafting trips, multi-day canoe trips and voyageur canoe trips. River Source was the first company on the Yellowstone to offer overnight and multi-day river trips, and provides more overnight trips than any other Yellowstone River outfitter. River Source operates from Gardiner, all the way to Pompeys Pillar (east of Billings) and provides services on over 150 river miles- more than any other outfitter in the area.

River Source provides custom, small group river expeditions. The majority of the trips are guided by the company's owner. All tours are custom tailored to the individual group. River Source fits their services into their clients schedule, a big contrast to the other rafting outfitters in the area who make the clients conform to the outfitters schedule.