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NEW VENUE: Mare Island - Vallejo, CA
Saturday, May 13th, 2023

Race information

The new venue will predominantly be on road with several miles of groomed dirt trails for the 10K and Half. Great for walkers, joggers, runners and strollers! Enjoy the fresh air and positive vibes. Mermaids receive a stylish race shirt, finisher medal, necklace and post race food.



Half - 8:00 a.m.
10K - 8:30 a.m. 
5K - 9:00 a.m.
mermaid dash (ages 9-12) - 10:00 a.m.
mermaid dash (ages 6-8) - 10:05 a.m.



Race Updates are sent the week of the event.


The Mermaid Dash is a 1.5 mile dash for girls & boys ages 6 to 12.

Dashers receive a medal, necklace and post race food. Parents are
welcome to run with the dashers. 
$15.00 online and $20.00 race day.

Entry fee does not include a race shirt



5K [map coming soon]

10K [map coming soon]
Half Marathon [
map coming soon]


Entry fees

Before - 2/16/23
5K: $54
10K: $64
half marathon: $74

Virtual: $54

2/16 - 3/15

5K: $59

10K: $69
half marathon: $79

Virtual: $59

Packet Pickup & Race Day* (5/1- 5/13)

*If race sells out there will be NO race day registration


5K: $69

10K: $79

half marathon: $89
Virtual: $69 


24 & Under

Receive a 20% discount off the current price

70 & Over

5K, 10K, Half, Free (in-person only)

3/16 - 5/1
5K: $64
10K: $74
half marathon: $84

Virtual: $59


We are happy to issue you a credit toward a future Mermaid Series event. To receive a credit, please email us at a minimum of 2 days before the event date. We will email you back a confirmation along with the amount of your future race credit. Please keep the confirmation email for your records. 


Our event credit and event cancellation policy is outlined on the event "Participant Waiver" which is agreed upon when you registered:

Mermaid Series (pdf) Wavier


The following credits will be issued: 

• Run - Entry fee minus $10 processing fee.
• Duathlon - Entry fee minus $10 processing fee
• Triathlons - Entry fee minus $10 processing fee

Packet pickup

Where: TBD
When: TBD
Directions: Google Maps 

**Athletes must bring a photo ID in order to pick up their packet

Where: Mare Island
When: 12:00 p.m. - 6:00 p.m.
Google Maps
** Athletes must bring a photo ID in order to pick up their packet

SATURDAY (race morning) Packet Pickup
Where: Mare Island 
When: 6:00 a.m. - 9:00 a.m.

Directions: Google Maps
Athletes must bring a photo ID in order to pick up their packet

**We recommend you arrive a minimum of one hour before your race 


We suggest to arrive a minimum of 1 hour prior to your race. For specific directions please reference the Google Map for Quarry Lakes Regional Park, Fremont, CA


Packet pickup - Registration 

What do I need to bring to packet pick-up/registration?
Bring your PHOTO IDENTIFICATION (ID) or a copy of your ID in order to receive your packet. A valid driver’s license or a valid passport is best. Minors are not required to show a photo ID. 


Can I pick up my friend’s packet for them?
Yes! Bring a copy of their photo ID and we’ll give you their packet.  You may have a photo of your friend's photo ID on your phone.


Are we required to pick up our packets before race day?
No, but we strongly recommend that you do. This allows you to get ready for your race instead of waiting in a line on race day.

What time should we be there on race day?
Check-in opens at 6:00 a.m. We recommend you get there 60 minutes before your start time to park and get ready for the race. If you didn’t get your packet before race day, you may want to give yourself even more time.

How soon does one need to register for the event?
The earlier, the better. Mermaid events have sold out in the past. To guarantee your entry we recommend you sign up early. Plus, the prices increase as the event date gets closer.

If the event closes, will there be a waiting list?



If I cannot race, can I give someone else my race number?

No. Race entries are non-transferable.  


How do I know you received my entry?

You should have received an email confirmation from the registration system. If you can’t find it, you can email us at We will verify your participation from our registration list.

Can I get a refund?

Unfortunately, there are no refunds. However, we do have an awesome cancelation policy. Email us at at least 2 days prior to the event and we’ll give you a credit toward a future race. The credit amount is your entry fee minus a $10 processing fee.

Run Course


How many miles is 5K? 10K? Half Marathon?
The 5K is 3.1 miles, the 10K is 6.2 miles, and the Half Marathon is 13.1 miles.  

Is the course hilly?

The course is mostly flat, but there are some small elevation gains. 

Is there is a time limit?

There is no time limit for the 5K or 10K. The Half Marathon does have a 3 hour and 40 minute cutoff. This equals approximately a 17:00/mile pace. For those needing additional time we will have offer a 7:30am early start. Participants who start early will receive a time but will not be eligible for awards.

Do you have aid stations? What kind of hydration/food is on the race course?

Yes, we have plenty of aid stations. Water, Ultima Replenisher electrolyte drink, and bars available at aid stations along the course.    


Can I run with a baby stroller?

Yes, you can run with a baby stroller, but the 10K and Half course will go on a dirt path, so the ride will be bumpy. If you choose to use a baby stroller, please start towards the back of the pack at the start line. 

Do you have prizes for winners?
Yes! We will have an awards ceremony at the expo. Awards are given to the 1st, 2nd, and 3rd place overall female winners for each distance and 1st, 2nd, and 3rd place female winners of each age group. You must be present at the awards ceremony to pick up your award.  Awards will not be mailed out. We do not offer awards for male categories.

What are the Age Groups?

Mermaid Age Groups are currently 10 and under, 11-14 15-17, 18-19, 20-24, 25-29, etc. Age groups from age 20 and over are separated by 5 year increments.  


I belong to a club or organization. Do you offer group discounts?
Yes! Have your club president or representative email us at to get the discount code.

How many do I need in my group to be eligible for a group discount code?
6 or more.



Are men allowed to compete in a Mermaid event?
Yes! Men are encouraged and welcomed to participate. We do not offer age group or overall awards for men or boys. 

Do I have to wear my paper, race number?

Yes, you are required to run with your bib number. The bib is used for timing, identification, and race photos. 

I heard this event uses Chip Timing. What is Chip Timing?
Chip timing allows us to record your time using a computer and gives the most accurate results. Your timing chip is attached to your bib.

Results and photos

Photos will be available approximately one to two weeks following the event.

2022 photos

2019 photos

2018 photos

2017 photos

2016 photos

2015 photos

2014 photos

2013 photos

2012 photos

Event photography by: Facchino Photography specializes in off-road event photography. Capturing athletes in their moment and allowing them flexibility in viewing and ordering convenience.

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