Modoc County is the northeastern county of California and is bounded on the north by the State of Oregon, on the east by the State of Nevada, on the south by Lassen and Shasta Counties, and on the west by Siskiyou County. Modoc County was originally a portion of Siskiyou County but was erected into a separate county by an Act of the Legislature of 1874, receiving its name from the celebrated Indian tribe. The population of Modoc County is 9,499.
The city of Alturas is located in the South Fork Valley where the North and South Forks of the Pit River meet. The elevation of Alturas is 4,446 ft. above sea level and population is 2,892. The Cascade Mountain Range is about 75 miles to the west.