The Redwood Experimental Forest (also Yurok Redwood Experimental Forest, formerly Yurok Experimental Forest) (established 1940) is an experimental forest in Del Norte County, California. The forest is near the mouth of the Klamath River in the California Coast Ranges of Northern California. The forest is drained by High Prairie Creek. As its name implies, the principal species in the forest is coast redwood (Sequoia sempervirens), but the site also contains Douglas fir, Sitka spruce, western hemlock, and Port Orford cedar. The forest is managed by the United States Forest Service. Tree ages range up to 1,200 years. Topography varies considerably over the forest. Slopes range from 0 to over 75 percent, and elevation ranges from .