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Triathlon Calendar near Fountain Valley 2025-2026

Explore the top triathlons near Fountain Valley for 2025-2026! We've gathered 105 exciting races in the area. Check out our detailed list below to find your next local race.

September 2025
Sep
5-7
Fr - Su

Disneyland Halloween Half Marathon Weekend

10 km
Sep
20
Saturday

Angel Stadium Spartan Stadion Weekend

Obstacle Run 5 km
Sep
20
Saturday

That's No Moon Ultras

Trail Run 30 km 50 km 50 mi
October 2025
Oct
4-5
Sa - Su

Long Beach Marathon

5 km 13 mi 26 mi
Oct
11
Saturday

RunningForCure

10 mi
Oct
11
Saturday

Night of the Living Runners Half Marathon

5 km 10 km 10 mi 13 mi
Oct
17
Friday

The Race for a Healthier World 5K

5 km
Oct
19
Sunday

Ghostly Gallup Half Marathon

5 km 10 km 10 mi 13 mi
Oct
25
Saturday

FIT FALL Halloween Harvest 10K

5 km 10 km
Oct
26
Sunday

Halloween Havoc Half Marathon - Fountain Valley, CA

5 km 10 km 13 mi
Oct
26
Sunday

Trick or Trot Half Marathon

5 km 10 km 13 mi
Oct
27
Monday

Alhambra Pumpkin Run

5 km 10 km
November 2025
Nov
1
Saturday

Beer City Half Marathon

5 km 10 km 13 mi
Nov
2
Sunday

Cal Tri Newport Dunes

Triathlon
Nov
8
Saturday

Fall Classic Triathlon

Triathlon
Nov
8
Saturday

Donut Runners Rejoice Half Marathon

5 km 10 km 10 mi 13 mi
Nov
15
Saturday

Hill Challenge 4 Mile

Trail Run 4 mi
Nov
15
Saturday

Caspers Trail Races

Trail Run 10 km 13 mi ... 26 mi 50 km
Nov
16
Sunday

Gobble Wobble Half Marathon

5 km 10 km 10 mi 13 mi
Nov
22
Saturday

DoggieRun 5K

4 km 5 km
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