- The Salmon River, also known as the “River of No Return”, is a river located in the U.S. state of Idaho in the western United States. It flows for 425 miles (685 km) through central Idaho, draining a rugged, thinly populated watershed of 14,000 square miles (36,000 km2). The river drops more than 7,000 feet (2,100 m) from its headwaters, near Galena Summit above the Sawtooth Valley in the Sawtooth National Recreation Area, to its confluence with the Snake River. Measured at White Bird, its average discharge is 11,060 cubic feet per second (82,700 US gal/s; 313 m3/s). The Salmon River is the longest undammed river in the contiguous United States.
- Racehorse Falls (waterfallsnorthwest.com)
Racehorse Creek thunders over a great waterfall situated within a short, shallow and very interesting gorge. The falls drop a total of 139 feet over four distinct steps. The first two tiers are back-to-back punchbowl-type plunges of 19 and 44 feet respectively, which both feature deep potholes at their bases. Immediately below the second tier the creek accelerates down a ramp-like cascading fall for about 15 feet and then comes to the final drop where it first plunges over an undercut ledge and then slams onto a diagonally pitched bedrock ramp and veils out in a broad sheet, with a small pool on one side about three-quarters of the way down and ending in a much larger pool. The basin at the bottom of the falls is held back by a second diagonally pitched ramp of bedrock, within which is another small fall of about 10 feet.