The Skagit River is designated the nation's largest National Wild and Scenic River system. An important nesting habitat for the nations biggest population of wintering bald eagles, the river also plays host to a wide variety of wildlife: Bear, Mountain Lion, songbirds, at least 25 different types of mammals, as well as all five types of salmon. Located along the Cascade Scenic Loop Highway, the Skagit flows west toward the Puget sound. The raft-able section of the river is largely Class I-II with a very swift Class III section known as the S-Bends rapids which has attracted whitewater boaters for decades. Children must weigh a minimum 50lbs (22kgs) to join.