The Iron Gate Dam to Happy Camp River Run on the Klamath River is a Class III+ section that requires intermediate to advanced experience. The run is approximately 20 miles long and contains several class III rapids and one class IV. The best time to float this section is from May to June with a recommended flow of 2000-3500 cfs. The biggest obstacle on this run is the Hell's Corner rapid, which contains a challenging entrance and several turbulent waves. Overall, this section offers a thrilling and scenic experience for experienced paddlers looking for a challenging adventure.