The Adair Creek to Fish Lake section of the Whitewater River in Idaho is a popular spot for rafting and kayaking. This segment spans for 11.8 miles and is rated as class III-IV, with a recommended streamflow range of 800-4,000 cfs. The river features several rapids, including S-Turn, Adair Falls, and the Fish Lake Ledge. These rapids offer a thrilling challenge for experienced paddlers, but beginners should exercise caution and seek the assistance of a guide.

As for regulations, the Idaho Department of Fish and Game requires anglers to possess a valid fishing license before casting a line in the river. Additionally, boats must be equipped with personal flotation devices for every person on board. The use of alcohol and drugs is prohibited.

Overall, the Adair Creek to Fish Lake section of the Whitewater River offers a thrilling adventure for experienced paddlers. Its challenging rapids, scenic views, and strict regulations make it a must-visit destination for outdoor enthusiasts.