Surprise Valley, Modoc County

Surprise Valley, Modoc County
Length60 mi (97 km)
Geography
LocationModoc County, California
Population centers
Cedarville, Lake City, Fort Bidwell, Lake Annie, Eagleville
Borders onWarner Mountains-NW, W & SW
Hays Canyon Range-E & SE
Coordinates41°31′45″N 120°10′24″W / 41.52917°N 120.17333°W / 41.52917; -120.17333 

Surprise Valley is an endorheic valley in extreme northeastern California, US, about 60 miles in length from north to south. Local people refer to the area as the Tricorner Region because of the region's location at the intersection of California, Oregon, and Nevada state lines. The valley is east of the Modoc County seat of Alturas. The area is part of the Great Basin which extends across most of the northern half of Nevada.