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Triathlon Calendar near Rancho Cucamonga 2025-2026

Explore the top triathlons near Rancho Cucamonga for 2025-2026! We've gathered 44 exciting races in the area. Check out our detailed list below to find your next local race.

September 2025
Sep
1
Monday

Mount Baldy Run to The Top

Trail Run 7 mi
Sep
3
Wednesday

Gypsum Canyon Wilderness 5k

Trail Run 5 km
Sep
4-7
Th - Su

Disneyland Halloween Half Marathon Weekend

5 km 10 km 13 mi
Sep
7
Sunday

Hot to Trot Half Marathon - Riverside

5 km 10 km 15 km 13 mi
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
Sep
27
Saturday

Angeles National Forest Trail Race

Trail Run 25 km 50 km
October 2025
Oct
12
Sunday

Runacopia Half Marathon - Riverside

5 km 10 km 15 km 13 mi
Oct
17
Friday

The Race for a Healthier World 5K

5 km
Oct
18
Saturday

Ruff Run California

Obstacle Run 4 km
Oct
19
Sunday

Mission Inn Run

5 km 10 km 13 mi
Oct
26
Sunday

Monster Dash Half Marathon - Anaheim

5 km 10 km 15 km 13 mi
November 2025
Nov
1
Saturday

Beer City Half Marathon

5 km 10 km 13 mi
Nov
23
Sunday

Anaheim Turkey Trot 10K

10 km
Nov
27
Thursday

Plymouth Rock n Run

5 km 10 km
Nov
27
Thursday

Rotary Club of Orange Thanksgiving Turkey Trot 5K

5 km
December 2025
Dec
6
Saturday

Fremont Canyon 28k Trail Run

Trail Run 28 km
Dec
21
Sunday

Reindeer Run Half Marathon - Riverside

5 km 10 km 15 km 13 mi
January 2026
Jan
10
Saturday

Citrus Heritage Run

5 km 10 km 13 mi
Jan
30
Friday

Disneyland Half Marathon Weekend

5 km 10 km 13 mi
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