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Triathlon Calendar near Riverside 2025-2026

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

August 2026
Aug
1
Saturday

Green Valley Lake Half Marathon

Trail Run 5 km 10 km Half Marathon
September 2026
Sep
26-27
Sa - Su

Temecula Spartan Event Weekend

Obstacle Run 5 km 10 km
November 2026
Nov
7
Saturday

Saddleback Marathon

Trail Run 10 km Half Marathon Marathon
January 2030
Jan
1
Tuesday

Gemini Timing Demo

5 km
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