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Half Marathon calendar near Castro Valley 2024-2025

Explore the top half marathons near Castro Valley for 2024-2025! We've gathered 76 exciting races in the area. Check out our detailed list below to find your next local race.

May 2025
May
31
Saturday

Beer City Half San Jose

5 km 10 km 13 mi
May
31
Saturday

Calero Trail Run - Spring

Trail Run 5 km 10 km ... 26 mi 50 km
June 2025
Jun
1
Sunday

Lake Chabot Trail Challenge

Trail Run 5 km 13 mi
Jun
1
Sunday

Cinderella Trail Run

Trail Run 8 km 13 mi ... 26 mi 50 km
July 2025
Jul
26-27
Sa - Su

The San Francisco Marathon

5 km 10 km 13 mi 26 mi
Jul
26
Saturday

Calero Hills Trail Fest

Trail Run 5 km 10 km ... 30 km 26 mi
August 2025
Aug
2
Saturday

Summer Breeze

5 km 10 km 13 mi
Aug
3
Sunday

Skyline 50k Endurance Run

Trail Run 21 km 50 km
Aug
15
Friday

Beer City Slam

5 km 10 km 13 mi
Aug
16
Saturday

Almaden Hills Trail Run - Summer

Trail Run 5 km 10 km ... 26 mi 50 km
Aug
16
Saturday

Redwood (Summer) Trail Run

Trail Run 5 mi 13 mi ... 26 mi 50 km
September 2025
Sep
27
Saturday

Pacifica Summit Run

Trail Run 10 km 13 mi
October 2025
Oct
18
Saturday

Diablo Summit Stomp

Trail Run 5 km 10 km 13 mi 30 km
November 2025
Nov
29
Saturday

Quarry Turkey Half Marathon

Trail Run 5 km 10 km 13 mi
December 2025
Dec
13
Saturday

Summit Rock Half Marathon

Trail Run 5 km 10 km 13 mi
Dec
27
Saturday

Brazen Almost New Year's Eve

5 km 10 km 13 mi