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Triathlon Calendar near Fairfax 2025-2026

Explore the top triathlons near Fairfax for 2025-2026! We've gathered 42 exciting races in the area. Check out our detailed list below to find your next local race.

July 2025
Jul
4
Friday

Alameda Parade R.A.C.E.

5 km
Jul
5
Saturday

Alameda Pint

5 km 10 km
Jul
12
Saturday

Dirty Dozen Run

Trail Run 3 hr 6 hr 12 hr
Jul
12
Saturday

Muir Woods Trail Run

Trail Run 10 km 13 mi 30 km
Jul
19-20
Sa - Su

Napa to Sonoma Half Marathon

5 km 13 mi
Jul
26-27
Sa - Su

The San Francisco Marathon

5 km 10 km 13 mi 26 mi
August 2025
Aug
2
Saturday

Summer Breeze

5 km 10 km 13 mi
Aug
9
Saturday

Bear Creek Run

Trail Run 5 km 10 km 13 mi
Aug
9
Saturday

Alameda 10-Miler

8 km 10 mi
Aug
16
Saturday

Tamalpa Headlands 50K

Trail Run 50 km
Aug
16
Saturday

Mission Bay Find-Your-Way 10K San Francisco

5 km 10 km
Aug
16
Saturday

Redwood (Summer) Trail Run

Trail Run 5 mi 13 mi ... 26 mi 50 km
Aug
23
Saturday

We Run Oakland: For Our Children

5 km
Aug
23
Saturday

Double Dipsea

Trail Run 13 mi
September 2025
Sep
7
Sunday

Berkeley Half

13 mi 26 mi
Sep
7
Sunday

Diplo's Run Club

5 km
Sep
13
Saturday

Berkeley Trail Adventure

Trail Run 10 km 13 mi 35 km 50 km
Sep
21
Sunday

Island Running Festival

5 km 10 km 13 mi
Sep
27
Saturday

Pacifica Summit Run

Trail Run 10 km 13 mi
October 2025
Oct
4
Saturday

Star City San Bruno Mountain Half Marathon

Trail Run 5 km 13 mi
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