Upcoming races in and near Diamond Bar, California. Use filters to quickly find races by distance, month or race type.
More races: USA running calendar
Date Race Distance Location hf:tax:distancecategory hf:tax:monthandyear hf:tax:typerace 12/07/2024 Jingle Bell Run โ Orange County & Inland Empire 5K Anaheim CA 5k 12-december roadrace 04/05/2025 Billy Goat Half Marathon & 10K Climb 10K, 13.1M Corona CA 10k half 04-april trail 12/07/2024 South Pasadena Tiger Run 10K, 5K South Pasadena CA 10k 5k 12-december roadrace 01/19/2025 Rose Bowl Half Marathon 13.1M, 5K Pasadena CA 5k half 01-january roadrace 11/23/2024 Miles for Migraine โ Los Angeles 5K Los Angeles CA 5k 11-november roadrace 11/16/2024 4 Mile Hill Challenge 4M Los Angeles CA 11-november trail 03/16/2025 Los Angeles Marathon 26.2M Los Angeles CA marathon 03-march roadrace 02/02/2025 Griffith Park Half Marathon 13.1M, 5K Los Angeles CA 5k half 02-february roadrace 01/04/2025 Citrus Heritage Run 10K, 13.1M, 5K Riverside CA 10k 5k half 01-january trail 05/03/2025 OC Marathon Running Festival 13.1M, 26.2M, 5K Costa Mesa CA 5k half marathon 05-may roadrace 02/02/2025 Surf City Marathon 13.1M, 1M, 26.2M, 5K Huntington Beach CA 5k half marathon 02-february roadrace 12/29/2024 Run in the New Years Half Marathon, 10K and 5K 10K, 13.1M, 5K Huntington Beach CA 10k 5k half 12-december roadrace 02/08/2025 The Heart Run Half Marathon & 5K / Super Bowl 5K 13.1M, 5K Huntington Beach CA 5k half 02-february roadrace 03/01/2025 SOCAL River Marathon 10K, 13.1M, 26.2M, 5K Huntington Beach CA 10k 5k half marathon 03-march roadrace 05/17/2025 O’Neill Park Trail Races 10K, 13.1M, 30K, 50K Trabuco Canyon CA 10k half half-marathon-to-full-marathon ultra 05-may trail 01/01/2025 New Years Day Dash Half Marathon 10K, 10M, 13.1M, 5K Long Beach CA 10k 10k-to-half-marathon 5k half 01-january roadrace 02/08/2025 Dolphin Dash Half Marathon 10K, 13.1M, 15K, 5K Long Beach CA 10k 10k-to-half-marathon 5k half 02-february roadrace 06/14/2025 Long Beach Classic Half 13.1M, 5K Long Beach CA 5k half 06-june roadrace 12/21/2024 Reindeer Run Half Marathon 10K, 13.1M, 15K, 5K Long Beach CA 10k 10k-to-half-marathon 5k half 12-december roadrace 02/15/2025 Cupid Dash Half Marathon 10K, 13.1M, 15K, 5K Long Beach CA 10k 10k-to-half-marathon 5k half 02-february roadrace 12/14/2024 Crystal Cove Trail Run 15K, 6K Newport Beach CA 10k-to-half-marathon 12-december trail 12/08/2024 Loma Linda Holiday Classic Half Marathon 13.1M, 5K Loma Linda CA 5k half 12-december roadrace 03/02/2025 Run Through Redlands 10K, 13.1M, 5K Redlands CA 10k 5k half 03-march roadrace 11/09/2024 The Saddleback Marathon 13.1M, 26.2M Lake Elsinore CA half marathon 11-november trail 11/16/2024 Caspers Trail Races 10K, 13.1M, 26.2M, 35K, 50K San Juan Capistrano CA 10k half half-marathon-to-full-marathon marathon ultra 11-november trail 06/08/2025 Fun in the Sun Half Marathon 10K, 13.1M, 15K, 5K Santa Monica CA 10k 10k-to-half-marathon 5k half 06-june roadrace 01/25/2025 Sean O’Brien Trail Runs 100K, 26.2M, 30K, 50K, 50M Calabasas CA half-marathon-to-full-marathon marathon ultra 01-january trail 03/22/2025 Valencia Trail Race 10K, 13.1M, 50K Santa Clarita CA 10k half ultra 03-march trail 12/07/2024 Ray Miller 50/50 30K, 50K, 50M Malibu CA half-marathon-to-full-marathon ultra 12-december trail 04/05/2025 Bedrock Valley Trail Runs 13.1M, 15K, 26.2M, 5K Hemet CA 10k-to-half-marathon 5k half marathon 04-april trail 04/05/2025 Great Race 10K, 13.1M, 1M, 5K Agoura Hills CA 10k 5k half 04-april roadrace 12/21/2024 Paramount Ranch Trail Runs 10K, 12H, 13.1M, 30K, 50K Agoura Hills CA 10k half half-marathon-to-full-marathon ultra 12-december trail 03/08/2025 Catalina Island Marathon 10K, 26.2M, 5K Avalon CA 10k 5k marathon 03-march roadrace 11/09/2024 Catalina Island Half Marathon 10K, 13.1M Avalon CA 10k half 11-november roadrace 11/16/2024 Revel Big Bear Marathon & Half Marathon 13.1M, 26.2M Big Bear CA half marathon 11-november roadrace 04/12/2025 Leona Divide Trail Runs 100K, 100M, 30K, 50M, 55K Lake Hughes CA ultra 04-april trail 02/15/2025 Boney Mountain Trail Runs 13.1M, 7K Thousand Oaks CA half 02-february trail 01/19/2025 Carlsbad Marathon 13.1M, 26.2M, 5K Carlsbad CA 5k half marathon 01-january roadrace 12/15/2024 Holly Jolly Half Marathon 10K, 13.1M, 5K Camarillo CA 10k 5k half 12-december roadrace 01/05/2025 Del Dios Trail Race 10K, 13.1M, 50K, 5K Escondido CA 10k 5k half ultra 01-january trail 02/01/2025 San Pasqual Valley Trail Race 10K, 13.1M, 20M Escondido CA 10k half half-marathon-to-full-marathon 02-february trail 03/22/2025 John Wayne Grit Series – Pioneertown 10K, 13.1M Yucca Valley CA 10k half 03-march trail 05/17/2025 La Jolla Half Marathon 13.1M, 5K Del Mar CA 5k half 05-may roadrace 02/16/2025 Palm Desert Half Marathon 13.1M, 5K Palm Desert CA 5k half 02-february roadrace 05/18/2025 Seaside Marathon California 10K, 13.1M, 26.2M, 5K Ventura CA 10k 5k half 05-may roadrace 02/23/2025 Ventura Marathon 13.1M, 26.2M Ventura CA half marathon 02-february roadrace 04/12/2025 Mountains 2 Beach Marathon and Half Marathon 10K, 13.1M, 26.2M, 5K Ventura CA 10k 5k half marathon 04-april 12/07/2024 Anza Borrego Cuyamaca 50 Mile Run 50K Julian CA ultra 12-december trail 07/12/2025 The Peak 50K 13.1M, 26.2M, 50K Julian CA half marathon ultra 07-july trail 12/22/2024 Ohana Holiday Run 5K San Diego CA 5k 12-december roadrace 12/15/2024 Jingle Bell Run โ San Diego 5K San Diego CA 5k 12-december roadrace 03/08/2025 Mermaid Half Marathon San Diego 10K, 13.1M, 5K San Diego CA 10k 5k half 03-march roadrace 02/22/2025 Sycamore Canyon Trail Race 100K, 13.1M, 50K San Diego CA half ultra 02-february trail 12/14/2024 San Diego Holiday Half Marathon 13.1M San Diego CA half 12-december roadrace 03/09/2025 Hot Chocolate Run โ San Diego 10K, 15K, 5K San Diego CA 10k 10k-to-half-marathon 5k 03-march roadrace 04/12/2025 San Diego Beach & Bay Half Marathon 10K, 13.1M, 5K San Diego CA 10k 5k half 04-april roadrace 03/23/2025 San Diego Half Marathon 13.1M, 5K San Diego CA 5k half 03-march roadrace 01/11/2025 San Diego Resolution Run Half Marathon 10K, 13.1M, 5K San Diego CA 10k 5k half 01-january roadrace 11/10/2024 Silver Strand Half Marathon 10K, 12K, 13.1M, 5K San Diego CA 10k-to-half-marathon 5k half 11-november roadrace 02/16/2025 Coronado Valentine’s Day 10K, 5K Coronado CA 10k 5k 02-february roadrace 03/30/2025 Bakersfield Marathon 10K, 13.1M, 26.2M, 6K Bakersfield CA 10k half marathon 03-march roadrace 05/10/2025 Santa Barbara Wine Country Half Marathon 13.1M Solvang CA half 05-may roadrace