May Classic Races within 50 miles of Castro Valley, CA
San Jose, CA
Quicksilver Endurance Runs
May 11, 2024
13 Mile Trail Race Top Down
May 18, 2024
Hacienda Hills Run
May 3, 2025
Willow Glen 5K
May 10, 2025
Leigh Longhorn Stampede
May 17, 2025
Beer City Half San Jose
May 31, 2025
Pleasanton, CA
Run to Remember
May 18, 2024
Petaluma, CA
5K Dash for Dance
May 19, 2024
Stinson Beach, CA
Stinson Beach Half Marathon
May 11, 2024
Miwok 100K
May 3, 2025
Stinson Beach/Muir Woods Marathon
May 10, 2025
Pacifica, CA
Pacifica Foothills Trail Run
May 18, 2024
San Mateo, CA
Mental Health Matters 5K
May 18, 2024
Los Gatos, CA
Girls on the Run 5K - Silicon Valley
May 17, 2025
Woodside, CA
Wildcat Prowl
May 11, 2024
San Francisco, CA
Viking Run
May 4, 2024
Race to Cure Sarcoma
May 11, 2024
Crissy Field 5K
May 12, 2024
Shannon Rowbury's Mother's Day 5K FUN|RUNch
May 12, 2024
Fog City Run
Jan 15, 2025
Jan 22, 2025
Jan 29, 2025
Feb 5, 2025
47 more
Patagonia 5K
May 4, 2025
Bay to Breakers
May 18, 2025
Alameda, CA
Mother's Day 5K/10K
May 12, 2024
Santa Cruz, CA
She.is.beautiful 5K and 10K
May 11, 2024
Danville, CA
Devil Mountain Run
May 19, 2024
Vallejo, CA
Mermaid Run Mare Island
May 11, 2024
Oakland, CA
Healing Hearts Walk/Run/MOVE! for Suicide Prevention
May 4, 2024
Aztec Run for Education
May 5, 2024
Sasquatch Scramble
May 12, 2024
LMJS Fourth Sunday Race
Aug 25, 2024
Jul 28, 2024
Sep 22, 2024
Oct 27, 2024
6 more
Bay Bridge Half Marathon
May 4, 2025
Saratoga, CA
Saratoga Rotary 5K for A Cause
May 4, 2024
Richmond, CA
Animal Run 5K/10K Canicross
May 18, 2024
El Sobrante, CA
Wildcat Half Marathon
May 18, 2024
San Leandro, CA
Girls on the Run 5K
May 11, 2024
Menlo Park, CA
MPAEF Schoolhouse Rocks 5K
May 19, 2024
Tracy, CA
Cinco De Mayo Fiesta Run
May 5, 2024
Los Altos Hills, CA
Pathways Run
May 11, 2024
Byron, CA
Rose 5K
May 11, 2024
San Pablo, CA
Nitro Trail Half Marathon
May 11, 2024
Briones Regional Park, CA
Armed Forces Half Marathon
May 25, 2024
Sat | Sun | Mon | Tue | Wed | Thu | Fri | Multiple |
1. Byxbee parkrun
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May 3, 2025Saturday
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5K run
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Palo Alto, CA
18 miles point to pointSanta Clara County, CA
2. Hacienda Hills Run
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May 3, 2025Saturday
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50K, 26.2M, 13.1M, 9M, 10K, 5K trail run
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San Jose, CA
19 miles point to pointSanta Clara County, CA
3. Miwok 100K
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May 3, 2025Saturday
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100K trail run
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Stinson Beach, CA
33 miles point to pointMarin County, CA
4. Bay Bridge Half Marathon
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May 4, 2025Sunday
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13.1M run
Virtual OptionMore Information
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Oakland, CA
12 miles point to pointAlameda County, CA
5. Cinco Mayo 5K
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Past DateMay 4, 2024Saturday
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5K run
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Stockton, CA
46 miles point to pointSan Joaquin County, CA
6. Healing Hearts Walk/Run/MOVE! for Suicide Prevention
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Past DateMay 4, 2024Saturday
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1M run | kids run
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Oakland, CA
12 miles point to pointAlameda County, CA
7. Patagonia 5K
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May 4, 2025Sunday
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5K, 1M run
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San Francisco, CA
19 miles point to pointSan Francisco County, CA
8. Saratoga Rotary 5K for A Cause
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Past DateMay 4, 2024Saturday
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5K run
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Saratoga, CA
30 miles point to pointSanta Clara County, CA
9. Viking Run
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Past DateMay 4, 2024Saturday
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5K, 2K run | kids run
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San Francisco, CA
19 miles point to pointSan Francisco County, CA
10. Aztec Run for Education
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Past DateMay 5, 2024Sunday
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5K run
Virtual OptionMore Information
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Oakland, CA
12 miles point to pointAlameda County, CA
11. Cinco De Mayo Fiesta Run
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Past DateMay 5, 2024Sunday
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13.1M, 10K, 5K run
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Tracy, CA
35 miles point to pointSan Joaquin County, CA
12. Fog City Run
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May 7, 2025Wednesday
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5K run
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San Francisco, CA
19 miles point to pointSan Francisco County, CA
13. Byxbee parkrun
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May 10, 2025Saturday
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5K run
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Palo Alto, CA
18 miles point to pointSanta Clara County, CA
14. Stinson Beach/Muir Woods Marathon
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May 10, 2025Saturday
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26.2M, 13.1M, 7M trail run
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Stinson Beach, CA
33 miles point to pointMarin County, CA
15. Willow Glen 5K
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May 10, 2025Saturday
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5K run
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San Jose, CA
19 miles point to pointSanta Clara County, CA
16. Girls on the Run 5K
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Past DateMay 11, 2024Saturday
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5K run
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San Leandro, CA
4 miles point to pointAlameda County, CA
17. Grizzly Peak Trail Run
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Past DateMay 11, 2024Saturday
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50K, 26.2M, 30K, 13.1M, 10K trail run | kids run
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Berkeley, CA
16 miles point to pointAlameda County, CA
18. High Five For Teachers 5K
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Past DateMay 11, 2024Saturday
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10K, 5K run
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Stockton, CA
46 miles point to pointSan Joaquin County, CA
19. Mermaid Run Mare Island
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Past DateMay 11, 2024Saturday
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13.1M, 10K, 5K run
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Women Only
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Vallejo, CA
30 miles point to pointSolano County, CA
20. Nitro Trail Half Marathon
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Past DateMay 11, 2024Saturday
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13.1M, 10K, 5K trail run
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San Pablo, CA
23 miles point to pointContra Costa County, CA
For the love of all that Is good And moisture wicking...
Though we Try To be accurate And On top Of things... Race details can change When we aren't lookin. And once in a while we simply make a mistake.
ALWAYS visit the race's website for the most complete and accurate race information.
ALWAYS visit the race's website for the most complete and accurate race information.