The Tieton is Washington"s most unique whitewater experience — a dam-release river that runs only during the annual September drawdown of Rimrock Lake. For three to four weeks each fall, the Bureau of Reclamation releases 1,500–2,500 cfs, transforming the normally dry Tieton into continuous Class III–IV whitewater. "Flip-Flop," the signature rapid, has earned its name honestly.
River conditions are community-verified. CFS ranges, difficulty ratings, and trip sections may not reflect every flow level or seasonal change. Always check current conditions, scout unfamiliar rapids, and paddle within your skill level. If you spot an error, use the Improve This River button at the top of the page — your local knowledge is what makes this atlas accurate.