UPDATE: The 5k, 10k, half marathon and sirena18 are sold out. Once a distance is sold out we will NOT be offering race day registration for that distance.

Parking at Quarry Lakes is $5.00 per vehicle. Please bring cash to pay at the ranger kiosk. Mermaids are encouraged to carpool to the event. If you are looking for a carpool please post a note to the Facebook event page.

Conquer a 5k, 10k, Half Marathon or the Sirena18 miler with us on Mother's Day weekend. The run is virtually flat making it an ideal course to kick up your heels and enjoy the sights. Make it a Mother's Day tradition.

Registration Fees

5k Closed

10k Closed

Half Marathon Closed

Sirena18 Closed

mini mermaid 1.5 mile dash Closed

Youth - 5k [19 & Under] Closed

Youth - 10k [19 & Under] Closed

Youth - Half Marathon [19 & Under] Closed

Event Schedule

  • May 10 7:30 AM PDT - Sirena18

  • May 10 8:00 AM PDT - Half Marathon

  • May 10 8:30 AM PDT - 10k

  • May 10 9:00 AM PDT - 5k

Contact Information

Event Location

Quarry Lakes Regional Recreation Area, Isherwood Way, Fremont, CA, United States

Click here to view map