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Trail Running calendar near San Marcos 2025-2026

We have found 43 Trailruns within 80 miles of San Marcos. See below where and when you can find the races.

Catalina Island Half-Marathon

Avalon - 68 mi from San Marcos

Run the scenic Catalina Island trail through Avalon, past the historic Wrigley Mansion and up to summit vistas over the Pacific. Choose a challenging half marathon, a hilly 10K, a kids fun run, or tackle the Triple Crown challenge.