Los Mugrosos Trail Run 10K
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Los Mugrosos Trail Run 5K and 10K
The Los Mugrosos Trail Run takes place on June 13, 2026 at the Whittier Narrows Natural Area in South El Monte, California. The event uses trail routes that run through tree-lined paths and open natural areas.
Runners can choose among multiple distances:
- 5K (3.1 miles) on a single-loop trail.
- 10K (approx 6.2 miles) on a two-loop trail course.
- Kids run, approximately 200 to 400 meters, for ages 3 to 12.
The 5K is described as beginner friendly and the 10K as intermediate. Registration for the 5K and 10K opens April 13, 2026 and closes May 1, 2026; fees are listed at $35 for the 5K and $45 for the 10K. Registration for the kids run opens April 13, 2026 and closes June 12, 2026; the kids dash is described as free with a registered participant. Prices increase after April 30.
The event day includes multiple distance options and looped trail formats, with separate participation for children. The setting and course types are suited to outdoor trail running within the natural area near 1000 S. Durfee Ave, South El Monte, CA 91733. Visit the organization's website for the most recent information.
