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

Sirena 6 Hour, Youth, Virtual

Saturday, Nov. 7th, 2026

Huddart Park, Woodside, CA

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

Sprint, Olympic, Half Iron, Aquabike, Splash & Dash

Oct. 1st - Nov. 30th

Virtual Event

For 2026 we will only be offering a virtual event. Registration includes the option to do everything from a Sprint distance to a Half Iron distance Tri and Du.

Swim Clinics, Tri & Du Clinic

2026 Clinics TBD

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Practice makes perfect! Learn all the tips and tricks to make your Tri or Du a fun and successful experience.

5K, 10K, Half, Youth, Virtual

EVENT ON HOLD
Mare Island - Vallejo, CA​

We hope to return to Mare Island in the near future.​

5K, 10K Half, Youth, Virtual

February 27th, 2027

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!

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 LEADERBOARD - Coming Soon

January 2027

Virtual - 31 Day Streak Challenge

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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?

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 LEADERBOARDS

July 1st to October 8th

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

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

Swim: 40 mile Challenge

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

April 25th, 2027

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!

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LEADERBOARD - Coming Soon

May 2027 

Virtual Step Challenge​

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Earn digital badges and get in as many steps as you can during the month of May. Each day there's a new badge to earn and a new step goal.

​Half, 10K, 5K, Youth, Virtual

2027 TBD

Spokane, WA

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We are hoping to bring the event back in 2027. Please email us if you're interested in the 2027 event. ​