Semper Tri Devil Dog Duathlon Camp Pendleton Hard Corps Race Series Oceanside

Semper Tri & Devil Dog Duathlon & 7K Run

September 21, 2019

Are you the ultimate endurance competitor or are interested in triathlons and looking for something a little different?

We would like to invite you and other multisport enthusiasts to join us for our Semper Triathlon, Devil Dog Duathlon & 7K No Beach Out of Reach Run! During this event you’ll get to come aboard our beloved Marine Corps Base, Camp Pendleton and participate where America’s finest fighting force hails. There will be much to see as you participate in the home of our Navy’s LCAC (hovercraft) and take that bike ride into the heart of our artillery regiment, home of the 11th Marines! If you haven’t done this event yet it’s a MUST on the bucket list! If you have done this event then you already know and we will see you at the start line!This race is open to Marines and Civilians Ages 9 and Up.

All are welcome to participate in this event.  Click here for registration and event information.

Triathlon Course

500 meter swim off of ACU-5 Camp Pendleton with an average water temperature of 68 degrees. The out and back 30K bike ride leaves ACU-5, follows Stuart Mesa Road North, and continues east to a turnaround point on Las Pulgas Road-moderate hills throughout. THE BIKE PORTION IS A CLOSED COURSE. The 5K run is a loop course through ACU-5. This run is flat and fast with a few easy inclines. Aid Stations will be located at the transition area, at the bike turnaround and every mile on the run course. Aid Stations are located at the transition area, at the bike turnaround and every mile on the run course.

7K No Beach Out of Reach Run Course (non-competitive)

The 7K No Beach Out of Reach Run begins with a 2K out and back beach run then continues with the same 5K run as the Triathlon and Duathlon which is a loop course through ACU-5. This run is flat and fast on the flight deck of ACU-5. Aid Stations will be located at the end of the beach run, and every mile on the 5K run course. This is a non-competitive/non-award race. Just for FUN!


Event Website

Hard Corps Race Series Logo


Downtown Oceanside Map350x400


Welcome to Oceanside Semper Tri participants!

We’re so excited to have you join us in Oceanside for this unique endurance event. We want planning your time with us to be as easy as possible so we’ve arranged for some special room rates that you can view below. However, if you feel that those options don’t quite meet your needs then feel free to read more about our Oceanside Lodging. If you want to explore a little bit more about we offer as a destination, then request to have an Oceanside Visitor Guide mailed out to you prior to your arrival.

Traveling with a group to Semper Tri and need hotels near Camp Pendleton?

If you’re planning a running vacation or racecation and traveling from out of town to participate in this event, consider staying in Oceanside. Oceanside gives you the quickest and easiest access to Camp Pendleton without the hassle of freeway traffic. If you’re traveling with your running or fitness group, let Visit Oceanside assist you in finding the perfect location for your group to stay together or find a venue for a group celebration after the event. Contact our Group Travel Department for more information.

Camp Pendleton Hard Corps race series

The race is part of the Camp Pendleton Hard Corps Race Series. These endurance events include cycling, running, paddleboarding, swimming, and challenging obstacle courses as well as fun for the whole family. See how your active lifestyle compares to our military forces.

Lodging Deals and Packages

Southern California Beach Club

Southern California Beach Club- Patio View121 South Pacific Street, Oceanside, CA 92054 |  (877) 351-3854

Discount: Up to 10% off based on availability and subject to change.

For the Visit Oceanside discount, use the promo code WXGN6 to receive 10% off your entire stay at Southern California Beach Club. You will be asked to enter the promo code at checkout. 

Click here to book Southern California Beach Club

SpringHill Suites by Marriott Oceanside

SpringHill Suites Oceanside Beachfront Hotel

110 N Myers St, Oceanside, CA 92054 | (760) 722-1003

Guests are invited to take advantage of a 15% savings off of regular rates at SpringHill Suites Oceanside when they book online at

Book and travel by December 31, 2018. Offer based on availability and is subject to change without notice. Valid for new reservations only. Not valid in combination with other promotional offers. Blackout dates and restrictions may apply. 

Wyndham Oceanside Pier Resort

333 Myers Street, Oceanside, CA 92054 | (760) 901-1200

Discount: Up to 15% off based on availability and subject to change.

Book your stay online or by calling 800-989-6901 and mention code AFFIL.

Click here to book Wyndham Oceanside Pier Resort!