The Challis-Yankee Fork Ranger District provides a multitude of opportunities for recreation year round. We are in the process of updating this site to provide you with the most current information. If you cannot find the information you need here, please call our offices at 208-879-4100 for assistance. To assist you in planning your trip, we have divided the district into several areas they are: Basin-Vally Creek Bayhorse-Squaw Cape Horn Challis East Fork Pahsimeroi Upper Salmon River Road If you click on "Find an Area" and then click on the plus arrow the the left of the "Challis-Yankee Fork Ranger District," you should see these areas and the trails and campgrounds within them.