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3mi, 6mi, 9mi, Half, Virtual

Saturday, Dec. 3rd

Huddart Park, Woodside, CA

Tails & Trails!! Hike, jog or run through the magical forest and towering redwoods on the lush trails in Woodside at Huddart Park.


5K, 10K Half, Youth, Virtual

Saturday, Feb. 25th 2023

San Diego, CA


The flat course is a mix of road and paved running path around Mission Bay. Soak in the views and the sun!

Coming Soon

Super Sprint Tri, Sprint Tri, Sprint Du, Aquabike

Saturday, Oct. 7th, 2023

Capitola, CA

The Mermaid Tri & Du is the longest running women's triathlon in California!

Perfect for the 1st time triathlete.



January 2023

VIRTUAL - 31 Day Streak Challenge

How many days can you STREAK together? Commit to exercise for 30 mins a day or 60 mins a day. Can you streak together ALL 31 days?


5K, 10K, Half, Sirena18, Virtual

Saturday, May 13th, 2023

Fremont, CA

Join us at Quarry Lakes Park for a flat and fun course with the perfect mix of dirt road and paved running path.

Coming Soon

5K, 10K, Sirena 10 Mile, Virtual

Fall 2023

Crissy Field, San Francisco

Run along the San Francisco Bay and soak in views of the Alcatraz and the Golden Gate. The Sirena10 Mile Run crosses the Golden Gate Bridge!



November 15th, 2022

46 Day Virtual Challenge

Every minute counts! The more minutes of exercise you log, the higher your ranking on the Leaderboard. Now you can yoga, walk, bike, row, swim, elliptical, hike and run to 2023.


5K, 10K, 10 Mile, Youth, Virtual

Saturday, May 20th, 2023

Spokane, WA


Head out from Riverfront Park and onto the Centennial Trail for a scenic run along the Spokane River. 


 ** 2022 LEADERBOARD **

July 2023

Virtual Walk/Run: 200 miles or 105 miles

Bike: 600 mile Challenge
Row/Paddle: 200 mile Challenge

Swim: 40 mile Challenge

A virtual tour of California