Monsters of the Deep- 5K, 10K, 15K and Half Marathon

Edition history
Santa Monica, CA, USA
02 Aug, 2025 (Sat)

Running

5 km, 10 km, 13.1 mi

About the event

Looking for an exciting and unique race to participate in? Look no further than the Monsters of the Deep , a race celebrating National Sea Serpent Day!

Come out and run along the beautiful coast as you take on this one-of-a-kind race. With a course that winds along the shoreline, you'll get the chance to take in breathtaking views of the ocean as you compete against other runners.

But beware - there are said to be monsters of the deep lurking just beneath the waves. Will you be brave enough to face them?

Whether you're a seasoned runner or just looking for a fun way to celebrate National Sea Serpent Day, the Monsters of the Deep is sure to be a thrilling experience. Sign up today and join us for this unique and unforgettable race!

Looking for a low-cost and intimate run/walk event that takes place along the ocean? Look no further than High Tide Runs, organized by Mercury Events LLC.


Join us for a run along the  oceanfront and breathe in happiness while exhaling the stress of yesterday. Let's get some good vibes and achieve our goals together.


Our boutique events remove barriers and help individuals connect and achieve their goals. Our friendly gatherings offer flexibility to sign up for any of at least four different distances, with no hassle or penalty fee if you want to change to a shorter distance on race day.

We take care of everything so that you can focus on your fitness and enjoy the ride.

 We provide water and fuel for all participants, and offer special incentives for those who sign up for multiple events or complete 10 or more events in a calendar year.


Sign up for 3 events at the same time, and get a 15% discount on the total


10 or more events in one calendar year, get a commemorative special edition HTR shirt
15 or more events in one calendar year and you earn free entry to another event
 

Discounts will be automatically applied at checkout, no discount codes to remember.

We will track you and let you know when you are close to qualifying for the 10 events and 15-event specials. Your job is to work on your fitness and enjoy the ride, leave the spreadsheets to us.


Who can register for our events?: Everyone! 


Our races are open to anyone who wants to participate, regardless of their age, ability level, or preferred pace. Whether you're a seasoned runner, a casual jogger, or a first-time walker, you are welcome to join us for our events. Parents are also encouraged to bring their children and push them in strollers. We believe that running and walking are activities that can be enjoyed by everyone, and we are committed to creating an inclusive and welcoming atmosphere for all participants. So come on out and join us for a fun and rewarding race experience!


About our courses:


 Our courses are not closed, which means that there are often other runners, walkers, and others enjoying the day along with you. Safety is must and all runners must stay on the pedestrian side of the beach path. The course never goes off the beach path. Courses are well marked with two water stations and restrooms along the way. This is an out and back course meaning you will begin and finish in the same location. 


The 5k, 10, & 15k will all run the same course. The turn around is located at mile 1.55 marked with a runner turn sign, large orange flag, chalk, and small blue and orange flags. 

5k will run 1 out and back loop

10k will run two out and back loops

15k will run 3 out and back loops 

https://www.strava.com/routes/3083581596280288582


The Half Marathon Runners will run 3 out and back loops.

The half marathon turn is located at mile 2.19 and marked with a large blue flag, runner turn sign, chalk, and small blue and orange survey flags.


https://www.strava.com/routes/3083582423935629200

 

 

 

What you get:


All participants will receive a finishers medal, finish line goodies, and free downloadable race photos. Race results will be posted on our website within 10 hours of the completion of the race. 

 

Refund and Deferral Policy:


Sorry but there are NO REFUNDS but we do offer deferrals until 48 hours before the event and you can transfer your entry to another person for free up to 48 hours before the event. There is a $15 cash transfer fee on the day of the event and matching ID is required to pick up your bib. 


Bib Pick Up and Start Times:


Bib Pick Up: 6:30 am near the start line

Half Marathon Start Time: 7:00 am

5k, 10k, 15k Start Time:  7:30 am

 

Start Location:

 2000 Ocean Ave 

Santa Monica, CA US 90405

Look for the easy up tents adjacent to Crescent Bay Park.


Not all GPS directions are created equal and we have been told that Apple Maps doesn't always get you to the right spot so stick with Waze. 


Parking Information:


If you park on the street be sure to read the signs carefully. Street sweeping is daily in Santa Monica. It is best to park in the paid parking lot near the start line. Parking ranges from $10 to $12 depending on the time of the year. If you arrive before the lot attendant is on duty you can pay at the machine near the entrance of the lot.

 

 

Races offered by this event

You have 28 weeks to prepare

Half Marathon

02 Aug, 2025 (Sat) - 07:00
Running

13.1 mi

Solo
On site
Road

5k

02 Aug, 2025 (Sat) - 07:30
Running

5 km

Solo
On site
Road

10K

02 Aug, 2025 (Sat) - 07:30
Running

10 km

Solo
On site
Road

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