Mermaid Trail Run - 2025

Explore San Carlos' outstanding trail system as a runner in the fourth annual No Foolin' Foot Race! There's something for everyone with four challenging events through Big Canyon, Eaton and Pulgas Ridge.

• 1K (~350ft of climbing) - Perfect for adventurous kids age 5-10

• 5k (~530ft of climbing)

• 10k (~1,500ft of climbing)

• Long Course NEW this year! (15K with ~2,300ft of climbing)

Early bird pricing available through March 18, 2026.

Consider yourself warned: This race is no joke! Our courses are technical, grueling and loads of fun.

We will be hosting course previews on Sunday, March 8 (5K and 10K routes) and Saturday, March 28 (5K and 15K routes) in partnership with A Runner's Mind and Brooks. RSVP on Strava, and join our Strava Club for updates.

Start and Finish Festival at Crestview Park. Professional timing; Tech-Ts and free runner photos for all participants; Awards in multiple categories.

All proceeds benefit maintenance and improvement of San Carlos open space trails.

A race is only as good as its crew! We have many exciting volunteer opportunities. All volunteers receive a free t-shirt and complimentary entry in next year's race. Sign up here.

Presented by Kaiser Permanente in partnership with the Parks and Recreation Foundation of San Carlos and the City of San Carlos.

The Menlo Park Kids Triathlon (“MPKT”) is a triathlon specifically for kids ages from 4 to 17 years old. A triathlon is a race that consists of a combination of three sports: swimming, cycling, and running. The kids start the race with swimming at the Burgess Pool in waves (triathlon speak for groups) of 20 to 25 kids. From the swim, they run to the transition area to put on their helmets, shoes, and anything else they need. They then mount their bikes and head out to the bike course. When the kids are done with the bike, they head back to transition to put their bike away, and head to run round Burgess Park. They finish the race in the park by crossing through the finishing chute!