wide, and the most thickly populated portion of the state; here, therefore, the range is easily defined, but in the S., near the Rogue river, it merges apparently with the Cascade and the Sierra Nevada Mountains in a large complex group designated as the Klamath Mountains, lying partly in Oregon and partly in California, and extending from the northern extremity of the Sierra Nevada to the sea.
The Klamath Mountains separate topographically southern Oregon from northern California.
The Upper and the Lower Klamath lakes of Klamath county are noted for their scenic beauty.
Near the northwestern boundary of Klamath county is the famous Crater Lake, whose surface is 6239 ft.
The river fauna of the coast is of two distinct types: the type of the Columbia fauna in rivers north of the Rogue; and another type in the Klamath and its tributaries.