California California Counties Regional Location Alameda County Bay Area Regional High School Science Bowl Alpine County Bay Area Regional High School Science Bowl Amador County Sacramento Regional High School Science Bowl Butte County Far Nor Cal High School Regional Science Bowl Calaveras County Central Valley Regional Science Bowl Calaveras County Sacramento Regional High School Science Bowl Colusa County Sacramento Regional High School Science Bowl Contra Costa County Bay Area Regional High School Science Bowl Del Norte County Far Nor Cal High School Regional Science Bowl El Dorado County Sacramento Regional High School Science Bowl Fresno County Central Valley Regional Science Bowl Glenn County Far Nor Cal High School Regional Science Bowl Humboldt County Far Nor Cal High School Regional Science Bowl Imperial County Bay Area Regional High School Science Bowl Inyo County Bay Area Regional High School Science Bowl Kern County Bay Area Regional High School Science Bowl Kings County Central Valley Regional Science Bowl Lake County Bay Area Regional High School Science Bowl Lassen County Far Nor Cal High School Regional Science Bowl Los Angeles County (excluding Los Angeles Unified School District), CA JPL Regional High School Science Bowl Los Angeles Unified School District, CA LADWP Regional High School Science Bowl Madera County Bay Area Regional High School Science Bowl Marin County SLAC Regional High School Science Bowl Mariposa County Bay Area Regional High School Science Bowl Mendocino County Bay Area Regional High School Science Bowl Merced County Central Valley Regional Science Bowl Modoc County Far Nor Cal High School Regional Science Bowl Mono County Bay Area Regional High School Science Bowl Monterey County Bay Area Regional High School Science Bowl Napa County Bay Area Regional High School Science Bowl Nevada County Bay Area Regional High School Science Bowl Orange County JPL Regional High School Science Bowl Placer County Sacramento Regional High School Science Bowl Plumas County Bay Area Regional High School Science Bowl Riverside County JPL Regional High School Science Bowl Sacramento County Sacramento Regional High School Science Bowl San Benito County Bay Area Regional High School Science Bowl San Bernardino County JPL Regional High School Science Bowl San Diego County Bay Area Regional High School Science Bowl San Francisco County SLAC Regional High School Science Bowl San Joaquin County Central Valley Regional Science Bowl San Luis Obispo County Kern County Regional High School Science Bowl San Luis Opispo County Bay Area Regional High School Science Bowl San Mateo County SLAC Regional High School Science Bowl Santa Barbara County Bay Area Regional High School Science Bowl Santa Clara County SLAC Regional High School Science Bowl Santa Cruz County SLAC Regional High School Science Bowl Shasta County Far Nor Cal High School Regional Science Bowl Sierra County Bay Area Regional High School Science Bowl Siskiyou County Far Nor Cal High School Regional Science Bowl Solano County Bay Area Regional High School Science Bowl Sonoma County Bay Area Regional High School Science Bowl Stanislaus County Central Valley Regional Science Bowl Sutter County Sacramento Regional High School Science Bowl Tehama County Far Nor Cal High School Regional Science Bowl Toulumne County Bay Area Regional High School Science Bowl Trinity County Far Nor Cal High School Regional Science Bowl Tulare County Bay Area Regional High School Science Bowl Tulare County Kern County Regional High School Science Bowl Tuolumne County Central Valley Regional Science Bowl Tuolumne County Sacramento Regional High School Science Bowl Ventura County Bay Area Regional High School Science Bowl Yolo County Sacramento Regional High School Science Bowl Yuba County Sacramento Regional High School Science Bowl