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Triathlon Calendar near Fountain Valley 2025-2026

Explore the top triathlons near Fountain Valley for 2025-2026! We've gathered 174 exciting races in the area. Check out our detailed list below to find your next local race.

April 2026
Apr
25
Saturday

Orange County Superhero 5K

5 km
May 2026
May
2-3
Sa - Su

The Hoag OC Marathon

5 km Half Marathon Marathon
May
2
Saturday

Nurses Rock

5 km 10 km
May
2
Saturday

SoCal's Cinco De Miles 5 Mile

5 km 5 mi
May
2-3
Sa - Su

Finish The Run Griffith Park

5 km 10 km ... 50 mi 100 km
May
2
Saturday

City of Rosemead's Superhero 5K

5 km
May
16
Saturday

O'Neill Park Trail Races

Trail Run 10 km Half Marathon ... Marathon 50 km
May
24
Sunday

Brentwood Run

5 km 10 km
May
25
Monday

Laguna Hills Memorial Day Half Marathon

3 mi 6 mi 13 mi
May
31
Sunday

Long Beach Classic Half Marathon

3 mi 13 mi
June 2026
Jun
7
Sunday

Griffith Park Trail Marathon Relay & 8K

Trail Run 8 km Marathon
Jun
20
Saturday

SoCal's Pirate's Run

5 km 10 km
Jun
20
Saturday

Mission Possible Run

5 km 10 km
July 2026
Jul
4
Saturday

IRVINE 4th of July-Red, White, & Blue 5k

5 km
Jul
4
Saturday

Freedom Run on the Ranch

5 km 10 km
Jul
11
Saturday

Endless Summer in the LBC Half Marathon

5 km 10 km Half Marathon
Jul
18-19
Sa - Su

San Clemente Ocean Festival

Multisport
Jul
18
Saturday

Harding Hustle

Trail Run 15 km 30 km 50 km
Jul
25
Saturday

Good Vibes Run Half Marathon

5 km 10 km Half Marathon
August 2026
Aug
9
Sunday

Hermosa Beach Triathlon

Triathlon
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