San Bernardino close

Triathlon Calendar near San Bernardino 2025-2026

Explore the top triathlons near San Bernardino for 2025-2026! We've gathered 36 exciting races in the area. Check out our detailed list below to find your next local race.

February 2026
Feb
14
Saturday

ONT's Runway 5K

5 km
March 2026
Mar
21-22
Sa - Su

Tough Mudder - Los Angeles

Obstacle Run 5 km 15 km
April 2026
Apr
5
Sunday

Cal Tri Lake Perris

Triathlon
Apr
17-18
Fr - Sa

Run4Kids Ultra Running Party

Backyard Ultra Half Marathon Marathon ... 100 mi 24 hr
Apr
18
Saturday

Natro@Noli Indian School

Trail Run 5 km Half Marathon Marathon
Apr
25
Saturday

Dash for disABILITIES Superhero 5K

5 km
May 2026
May
2
Saturday

Nurses Rock

5 km 10 km
May
16-17
Sa - Su

Big Bear Spartan Weekend

Obstacle Run 5 km 10 km Half Marathon
May
17
Sunday

Gorgonio View Trail Run

Trail Run 10 km
May
23-24
Sa - Su

Nanny Goat

Trail Run 6 hr 12 hr 100 mi 24 hr
June 2026
Jun
6
Saturday

Fontana Days Run

5 km 13 mi
Jun
20
Saturday

Jade's Furry Friends 5K

5 km
August 2026
Aug
1
Saturday

Green Valley Lake Half Marathon

Trail Run 5 km 10 km Half Marathon
October 2026
Oct
3
Saturday

Angeles Crest 100 Mile Endurance Run

Trail Run 100 mi
Oct
17
Saturday

Ruff Run California

Obstacle Run
January 2030
Jan
1
Tuesday

Gemini Timing Demo

5 km
Articles
Top 10 Marathons in the Netherlands — The Ultimate Dutch Marathon Bucket List: 10 Unmissable Races
The Beauty of the Easy Run — Why slowing down might be the smartest thing you do for your running
Mizuno Wave Rider 28: Elevating the Legacy of a Running Icon
Garmin Forerunner Review: Garmin Forerunner Series