PNW Whitewater Rafting · #5
Upper Klamath River
Oregon/California, USA

The Upper Klamath, particularly the 'Hell's Gate' section, is not for the faint of heart. This is serious Class IV-IV+ whitewater, often dubbed the 'Big K,' known for its continuous, technical, and high-volume rapids. It flows through a remote, arid canyon on the Oregon-California border, offering a unique blend of high desert scenery and intense whitewater. The season is typically late spring through fall, thanks to reliable dam releases from Link River Dam. Access is from near Keno, Oregon, requiring a drive into a fairly remote area. This is strictly for experienced paddlers or those going with highly competent commercial outfitters. The remoteness means self-sufficiency is key. Expect long days on the water with very little flatwater between drops. The trade-off is its intensity and the commitment required; this isn't a casual float. No specific permits beyond standard state regulations, but it's crucial to have solid river skills and a well-equipped group. **Highlights** * Continuous, technical Class IV-IV+ whitewater * High volume rapids, including 'Caldera' and 'Hell's Gate' * Remote high desert canyon scenery * Reliable flows due to dam releases * Challenging and rewarding for experienced rafters **Watch-outs** * Very demanding, not suitable for beginners * Remote access, requires self-sufficiency * Long day on the water with continuous rapids * Potential for long swims in cold, powerful water
Full profile in progress
We're building out complete profiles for every pick on every list — weather windows, wildlife, key attractions, and permit logistics. This entry is next in the queue. In the meantime, the ranked note above is our short answer for why it made the list.
Upper Klamath River — frequently asked questions
- Is Upper Klamath River worth the trip?
- We rank it #5 in PNW Whitewater Rafting. The Upper Klamath, particularly the 'Hell's Gate' section, is not for the faint of heart. This is serious Class IV-IV+ whitewater, often dubbed the 'Big K,' known for its continuous, technical, and high-volume rapids.

