Kelseyville Riviera (formerly Clear Lake Riviera) is a planned community in Lake County, California. It lies at an elevation of 1755 feet (535 m). The population was 3,410 at the 2020 census. Kelseyville Riviera nestled in the shadow of Mount Konocti overlooking Clear Lake - California's largest natural lake - with mesmerizing views of the sparkling lake and captivating surroundings.