- Mount Persis is a 5,464-foot (1,665-metre) summit located in Snohomish County, of Washington state. The mountain is part of the Cascade Range and is situated in the Mount Baker-Snoqualmie National Forest. The mountain was named for Persis Gunn (1846–1898), wife of homesteader/miner Amos Gunn who started the nearby town of Index, Washington, and also named nearby Mount Index. Precipitation runoff from the mountain drains into tributaries of the Skykomish River. Topographic relief is significant as the summit rises 4,160 feet (1,270 meters) above Anderson Creek in 0.8 mile (1.3 km). The rocks of Mount Persis are volcanic in origin and are considered amongst some of the earliest expressions of volcanism in the Cascade Mountain range in Washington.
- 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.