The Bass Festival, also known as Bass Derby, is held during the second weekend of October in Rio Vista, California

Rio Vista, California

Rio Vista is a city located in the eastern end of Solano County, California in the San Francisco Bay Area, on the Sacramento River, in the Sacramento River Delta region. The population was 7,360 at the 2010 census....

. It is the celebration of bass coming into the Sacramento River

Sacramento River

The Sacramento River is an important watercourse of Northern and Central California in the United States. The largest river in California, it rises on the eastern slopes of the Klamath Mountains, and after a journey south of over , empties into Suisun Bay, an arm of the San Francisco Bay, and...

. It features a carnival, a street fair, live bands and a bass fishing competition. It is the largest annual event in Rio Vista with tens of thousands of people coming yearly.