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July 1st to October 9th

Virtual Walk/Run: 200 miles
Virtual Walk/Run: 105 miles​

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

Swim: 40 mile Challenge


 3 mile, 6 mile, 9 mile, Half Marathon,

Sirena 6 Hour, Youth, Virtual

Saturday, Nov. 9th, 2024

Huddart Park, Woodside, CA

Join us for our annual Tails & Trails! Hike, jog or run through the magical forest and towering redwoods at Huddart Park in Woodside, CA.

Opens 8/1/24

5K, 10K Half, Youth, Virtual

March 8th, 2025

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!


Sprint Tri & Du, Super Sprint Tri, Aquabike, Virtual

October 5th, 2024

Capitola, CA

The longest running women's triathlon in California! We've added a Super Sprint Triathlon that is great for new athletes looking to do their first triathlon. 



Thursday, Nov 7th

Sports Basement - Redwood City

2024 Global Tour is open to the public! Film Festival will be in conjunction with the Packet Pickup for the Mermaid Trail Run. Participants in the run save $5 on the price of tickets.


5K, 10K, Half, Youth, Virtual

Saturday, May 11th

Mare Island - Vallejo, CA

Start and finish along the historic Mare Island waterfront. After the race enjoy the cool breeze and hang out at the Mare Island Brewery.


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

September 22nd, 2024

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!

Opens 10/1/24

 ** 2024 LEADERBOARD **

January 2025

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, 10 Mile, Youth, Virtual

Saturday, May 18th

Spokane, WA


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

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