Cool (formerly, Cave Valley) is a small unincorporated community in El Dorado County, California, about 70 miles from Sacramento, the state capital. Cool is at an elevation of 1532 feet (467 m).
The population is about 2520, and the community is inside area code 530 with a ZIP code of 95614.
It is built on State Route 49 between Auburn and Placerville on a hill at an elevation more than 1500 feet (450 m), and in an area full of trees, trails, camping and other recreational activities.
The temperature ranges from 75° to 115° degrees Fahrenheit in the summer and 25°F to 50°F in the winter.
The first post office was established in 1885.
The Way Too Cool 50 Kilometer run starts and ends in the town in early March. It follows sections of the Western States Trail with more than a 7000 ft (2100 m) elevation change along its 31-mile length.
In the state legislature Cool is located in the 1st Senate District, represented by Republican Dave Cox, and in the 4th Assembly District, represented by Republican Ted Gaines. Federally, Cool is located in California's 4th congressional district, which has a Cook PVI of R +11 and is represented by Republican John Doolittle.
Cool currently has just one school - Northside School - catering for elementary (K-6) and middle school (7-8) grades. Until 2007 there was also another K-5 and middle school - Cool Christian School.