River Source Rafting is the premier rafting company on the Yellowstone. Discover the River Source Experience for yourself. We have the most spectacular location on the Yellowstone! Enjoy our deck over the river, Feel good about leaving your car in our secured private parking lot, watch video's of your trip online! Our boats and guides have video cameras on them to capture the fun! No bus rides! Our river trip starts right outside our door- we have our own private river access