Madison River , Lower - Ennis Lake to Three Forks Professional Review and Guide
"Exiting the shallow Ennis Reservoir, the Madison pours into the Bear Trap canyon with enough energy to earn its Class IV whitewater status year-round. Hiking trails parallel the river throughout this 7-mile canyon. Access is available at the dam or via the Warm Springs fishing access at the bottom of the canyon where Highway 84 joins the river.
Keep your eyes to the ground throughout this region as rattlesnakes are prevalent. Types of Fish: Brown and Rainbow Trout, Whitefish. This fly-fishing chapter describes the "where, when, and how" for fishing in this area. It includes a full-page map and information on the known hatches, suggested equipment to use, the best flies to use, season, limits, nearby accommodations, and camping."