Hey Runners! So many races are being cancelled. postponed, rescheduled due to COVID-19, that we are unable to keep up. We are updating the listings as quickly as we can. However, things are changing faster than we can update them.

Many of the affected races are offering alternate options, including virtual options. We are unable to show these options. Even if a listing is marked as cancelled, please check with the race's website for all current information and options.

Upcoming Ultras within 50 miles of San Mateo, CA

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1. Woodside/Purisima Creek Crossover
2. Diablo Trails Challenge
3. Redwood
4. SPASM Lake Chabot
5. Mountain Brow House 50K
6. Rodeo Beach Rumble
7. Sierra Azul Challenge Run
8. Miwok 100K
9. Horseshoe Lake
10. Grizzly Peak
11. Quicksilver Endurance Runs
12. Mt Diablo Trail Run
13. San Francisco 50 Miler
14. Ohlone 50K Trail Run
15. Devils Slide Trail Run
16. Big Basin - Skyline to the Sea
17. Calero Trail Run
18. The Ridge
19. Cinderella
20. San Lorenzo River

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.