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Triathlon Calendar near Rancho Mission Viejo 2025-2026

Explore the top triathlons near Rancho Mission Viejo for 2025-2026! We've gathered 29 exciting races in the area. Check out our detailed list below to find your next local race.

May 2025
May
4
Sunday

SoCal's Cinco De Miles 5 Mile

5 km 5 mi
May
10
Saturday

John Wayne Grit Series - Newport Coast

Trail Run 5 km 25 km 50 km
May
10
Saturday

Night Nation Run - Orange County

5 km
May
10
Saturday

Billy Goat Half Marathon Climb

Trail Run
May
17
Saturday

O'Neill Park Trail Races

Trail Run 10 km 13 mi ... 26 mi 50 km
May
17
Saturday

SoCal's Pirate's 10k Run/Walk

5 km 10 km
May
18
Sunday

Great Donut Run 5k

5 km
May
24-25
Sa - Su

Nanny Goat

Trail Run 6 hr 12 hr 100 mi 24 hr
May
26
Monday

Laguna Hills Memorial Day Half Marathon

5 km 10 km 13 mi
June 2025
Jun
28
Saturday

Whiting Ranch Trail Races

Trail Run 6 km 10 km 13 mi 30 km
July 2025
Jul
4
Friday

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

5 km
Jul
4
Friday

Orange Park Acres 5k

5 km
Jul
4
Friday

Freedom Run on the Ranch

5 km 10 km
Jul
19
Saturday

Harding Hustle

Trail Run 15 km 30 km 50 km
August 2025
Aug
2
Saturday

Riley Park Trail Races

Trail Run 5 km 10 km ... 13 mi 30 km
Aug
24
Sunday

Splash Dash 5k

5 km
September 2025
Sep
4-7
Th - Su

Disneyland Halloween Half Marathon Weekend

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
11
Saturday

RunningForCure

10 mi
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