Crump Lake (Oregon)

Crump Lake
Crump Lake shoreline
Location	Eastern Lake County, Oregon, US
Coordinates	42°17′41″N 119°49′31″W / 42.2946°N 119.8252°W / 42.2946; -119.8252Coordinates: 42°17′41″N 119°49′31″W / 42.2946°N 119.8252°W / 42.2946; -119.8252
Lake type	Natural lake
Primary inflows	Deep Creek and Twelvemile Creek
Primary outflows	Wetland channel to Hart Lake
Catchment area	835 square miles (2,160 km2)
Max. length	7.2 mi (11.6 km)
Max. width	2.8 mi (4.5 km)
Surface area	7,680 acres (3,110 ha)
Average depth	3 ft (0.91 m)
Max. depth	6 ft (1.8 m)
Shore length1	70.9 mi (114.1 km)
Surface elevation	4,476 ft (1,364 m)
1 Shore length is not a well-defined measure.

Crump Lake is a shallow lake in the Warner Valley of eastern Lake County, Oregon, United States. The lake covers 7,680 acres (31.1 km²). It is the largest of the Warner Lakes system. The lake is named for pioneer rancher Thomas Crump. Crump Lake is owned by the Oregon Department of State Lands. Much of the land around the lake is administered by the Bureau of Land Management and the United States Fish and Wildlife Service. The lake and the surrounding wetlands support a wide variety of birds and other wildlife. Recreational opportunities on or near Crump Lake include fishing, bird watching, and camping.

Crump Lake is located 4.5 miles (7.2 km) north of the unincorporated community of Adel, Oregon at the southern end of the Warner Valley in south-central Oregon. The valley is approximately 60 miles (97 km) long and 8 miles (13 km) wide. Most of the valley is in Lake County, however the north end of the valley extends about 10 miles (16 km) into Harney County. It is an alluvial basin containing numerous lakes, remnants of a single great lake that covered the valley floor up to 200 feet (61 m) deep during the epoch. Today, steep cliffs rise above a chain of endorheic lakes including Crump Lake, known collectively as Warner Lakes. The valley has two regions commonly referred to as South Warner Valley and North Warner Valley. The two areas transition between Crump Lake in the south and Hart Lake to the north at a point where the valley narrows to about 5 miles (8.0 km) in width.

There are numerous lakes in the Warner Lakes chain. Starting at the south end of the valley, the Warner Lakes are Pelican Lake, Crump Lake, Hart Lake, Anderson Lake, Swamp Lake, Mugwump Lake, Flagstaff Lake, Upper Campbell Lake, Lower Campbell Lake, Stone Corral Lake, Turpin Lake, and Bluejoint Lake. The valley slopes toward the north. As a result, the elevation of Crump Lake is 13 feet (4.0 m) higher than Bluejoint Lake. Ultimately, the Warner Lakes system has no outlet so its waters eventually evaporates from the lake surfaces and associated wetlands.