Oregon Coast Range
The Oregon coast extends in a general north and south direction for roughly 300 miles, and consists of long stretches of sandy beach broken occasionally by lateral spurs of the Coast range, forming small coastal bays.
Parallel with the coast, about 20 miles inland is an irregular chain of hills know as the coast range. Although not very high, (greatest peak at 4097 feet), the coast range has numerous lateral spurs, especially towards the west.
Several rivers such as the Nehalem Coquille, Rogue, and Umpqua cut their way through the coast range to reach the Pacific ocean.
The northern two-thirds of the Oregon Coast range is bordered on the east by the Willamette Valley, a region about 200 miles ling and about 30 miles wide, and the most populated portion of the state, and is easily defined, but in the south, near the Rogue river, it merges apparently with the Cascade and the Sierra Nevada mountains in a large complex group called the Klamath mountains, lying partly in Oregon and partly in California.