Sediment Dam Viewpoint

Sediment Dam Viewpoint sits at 982 feet along the byway between the junction with SR 5 near Castle Rock and Johnson Ridge. The overlook faces north, and the land drops 188 feet within 600 meters of the viewpoint. Hatchet Mountain is visible to the northwest, 3.8 miles away, rising to 1,712 feet. Longview is 23.8 miles to the southwest, Centralia is 31.2 miles to the northwest, and Saint Helens is 36.5 miles south-southwest. On the March equinox, the sun rises at 07:14 and sets at 19:23; at the June solstice, sunrise is at 05:19 and sunset at 21:07; at the September equinox, sunrise is at 06:58 and sunset at 19:10; and at the December solstice, sunrise is at 07:51 and sunset at 16:27. The next lookout along the route is Castle Lake Viewpoint.