Salmon River Professional Review and Guide
"The Salmon River, which starts on the slopes of Timberline Ski Area, is the only river in the lower 48 states that is classified as a Wild and Scenic River from its headwater to its mouth. (To see its headwater and ford it where you can skip across, do the Barlow Pass or Timberline Lodge trip; see pages 166 and 213, respectively.)
The trail along the Salmon can be thought of as having three sections. The upper and lower sections, described here, are extremely easy to get to, and in the fall they host—wait for it—spawning salmon. The uppermost section, accessed by a different road near Trillium Lake, is less interesting than these and tougher to find; its only advantage is that hardly anybody hikes it. For hardier hikers, I’ve also included an optional side trip to Devils Peak."