Below is an alphabetized list of partners that offer the California Naturalist certification course by regions of California. 

San Francisco & Monterey Bay Areas

• Alameda Creek Alliance
• All Hands Ecology
• Conservation Society of California - Oakland Zoo
• Grassroots Ecology
• Hayward Area Recreation and Park District
• Las Positas College
• Midpeninsula Regional Open Space District
• Museum of the American Indian
• Pacific Grove Museum of Natural History
• Point Reyes National Seashore Association
• Richardson Bay Audubon Center & Sanctuary
• Rotary Nature Center Friends
• San Jose Conservation Corps & Charter School
• Sutro Stewards
• UC Santa Cruz Arboretum
• West Valley College

Sierra & Central California

• American River College
• Calaveras Big Trees Association
• Columbia College
• Cosumnes River Preserve
• Effie Yeaw Nature Center
• Four Rivers Natural History Association
• Pepperwood Preserve
• Sierra Forever
• Solano Community College
• Sonoma County Regional Parks
• Sonoma Ecology Center
• Stewards of the Coast & Redwoods
• Tuleyome
• UC Davis: Wild Davis
• UC Merced Vernal Pools & Grassland Reserve
• UC Merced Yosemite Field Station
• Yosemite Conservancy (coming soon) 

Northern California 

• American River Conservancy
• Center for Ecodynamic Restoration
• Chico Creek Nature Center
• College of the Redwoods
• Feather River Land Trust (coming soon)
• Friends of the Dunes
• Lake Tahoe Community College
• Sierra Streams Institute
• Tahoe Institute for Natural Sciences at Sagehen Creek Field Station
• UC Hopland Research & Extension Center
• Western Shasta Resource Conservation District (coming soon)

Southern California 

• Anza-Borrego Foundation
• Audubon Center at Debs Park
• Bolsa Chica Conservancy
• CactusToCloud Institute
• Catalina Island Conservancy
• Community Nature Connection
• Conservation Corps of Long Beach
• Council of Mexican Federations in North America (COFEM)
• Cuesta College
• Dominguez Rancho Adobe Museum
• El Modena High School
• Grossmont College
• Los Angeles County Arboretum
• National Forest Foundation Junior Field Rangers
• Nature For All
• Nature Up Close
• Norco College
• Pacoima Beautiful
• Palomar College
• Pasadena City College
• Preserve Calavera
• Riverside-Corona Resource Conservation District
• Santa Monica Mountains Fund
• Southern California Mountains Foundation
• Teranga Ranch Wildlife
• Transition Habitat Conservancy
• UC Riverside Palm Desert Center
• USC Sea Grant

Statewide 

• California Conservation Corps (coming soon)