top of page

Saturday, November 11th
3 mile, 6 mile, 9 mile, Half, Virtual
*NEW* Sirena 6 Hour Individual & Relay



** NEW FOR 2023 ** We've added a timed 6 Hour Run/Hike!
We're excited to offer our first timed event for Mermaid Athletes! Participants in the Sirena 6 Hour will challenge themselves to run or hike as many 3 Mile loops as they can within the 6 hour time limit. Challenge yourself as an Individual or part of a 2 Person Relay Team. Participants will have access to a designated crew/drop bag area along the finish chute and will also have access to a special 6 Hour Aid Station stocked with all the fun food and snacks needed to fuel for 6 hours of fun! We're talking pancakes, quesadillas, melons, and more.

Join us for a fun run/hike/walk at Huddart Park in beautiful Woodside, CA. Towering redwoods, lush trails and the magical forest await....


Race Update #1 & #2


8:45 am - Sirena 6 Hour

9:00 am - Half Marathon

9:15 am - 9 Mile

9:30 am - 6 Mile

9:45 am - 3 Mile

Mermaid Dash - 11:00 am


6 Hour (3 mile Loop) - [map] [pdf] [Interactive Map]
Half Marathon - [map] [pdf] [Interactive Map]
9 mile - [map] [pdf] [Interactive Map]
6 mile - [map] [pdf] [Interactive Map]
3 mile - [map] [pdf] [Interactive Map]
mermaid dash - [map] [pdf]

Entry Fees

Entry fees are listed on the Registration page.

We offer FUTURE RACE CREDITS (credits for the following year or a different event) for those who volunteer a shift at any of our events. Volunteer shifts include registration, course monitors, water stations, set up and clean up. To find out more about our volunteer opportunities please email:

Youth receive 20% off the current registration price.

Mermaid Youth 1.5 Mile Dash is $15.00 online or $20.00 at the event. Dash entry does NOT include a shirt, but does include a medal and necklace.



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 10 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: 

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

Packet Pickup

Saturday RACE-DAY packet pickup : 
Location: Huddart Park, 1100 Kings Mountain Road, Woodside, CA
Time: 8:00 a.m. to 9:45 a.m.
You must have a photo i.d. in order to pick up your packet


PLEASE BRING $6 CASH (EXACT CHANGE APPRECIATED) There is limited parking at the venue in Huddart Park. We encourage all participants to carpool to the event.



Parking Map





Is the course hilly?

YES! There are some big hills, but without the hills you wouldn't get the fabulous downhill finish.... Enjoy them, embrace them, curse them, but rest assured they'll be on the course. There are some steep hills so plan on hiking or walking the big ones and then you enjoy the wind in your hair as you blaze downhill for your epic finish. 

Is there is a time limit?

There is no cut-off for the 3 mile and 6 mile run. There is a cut-off for the Half Marathon and the 9 mile run. You will need to keep a 25 min/mile pace and reach the third aid station at Mile 6 by (Skyline Trail @Kings Mountain Road) by 11:30 am in order to continue.


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

Yes, we have plenty of aid stations. Water, Ultima Replenisher electrolyte drink, and snack bars are available at aid stations along the course.  We strongly suggest that you carry at least 20 OZs of water at all times.


Can I run with a baby stroller?

Unfortunately, the trails are NOT suitable for baby strollers. 


Do you have prizes for winners?
Yes! We will have an awards ceremony at the expo. Note, we do not give out awards for the men's categories. Awards are given to the 1st, 2nd, and 3rd place overall female winners for each distance and 1st, 2nd, and 3rd place winners of each female age group. Age groups are based in 10 year increments. You must be present at the awards ceremony to pick up your award.  Awards will not be mailed out. NOTE: We do not give out male overall winner or age group awards.

What are the Age Groups?

Mermaid Age Groups are currently 9 and under, 10-14, 15-19, 20-24, 25-29, etc. Age groups from age 20 and over are separated by 5 year increments. 



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. 


What time should we be there on race day?
Packet pick up opens at 8:00 a.m. We recommend you get there at that time to get your packet and get ready for the race.

How soon does one need to register for the event?
The earlier, the better. Registration 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.  Please email us at if you can not race to inquire about a credit.


How do I know you received my entry?

You should have received an email confirmation from our 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 10 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.




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 can register and participate. However, since Mermaid is primarily a women’s event (about 97-98% of participants are women), men are not eligible for awards.

Do I have to wear my paper, race number?

Yes, you are required to run with your bib number. This 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.


2023 - Results

2022 - Results
2021 - Results
2019 - Results
2018 - Results
2017 - Results

2016 - Results


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

2021 photos

2019 photos

2018 photos

2017 photos

2016 photos

bottom of page