Summer Triathlon Series 2020

Are you ready to swim, bike, and run for Osan’s Summer Triathlon Series? There are three triathlon races to look out for — one in July, one in August, and one in September!

Challenge yourself to complete one set of races or all of them!

Race #1 — July 23: 250 meter swim / 6 mile bike / 1.5 mile run
Race #2 — August 29: 500 meter swim / 12 mile bike / 3.1 mile run
Race #3 — September 26: 1.5 mile run / 18 mile bike / 3.1 mile run

Cost & Details

$20 for 1 Race Set
$50 for All 3 Race Sets

Registration required two-weeks in advance prior to each race set.
Pay at the Fitness Center front desk, Bldg. 1423.
Open to DoD ID holders and for ages 16 years and older.

Triathlon Dates

July 25 (0900 – 1200)
August 29 (0900 – 1200)
September 26
(0900 – 1200)

Registration Deadlines

July 11
August 15
September 12

Registration Links

July Triathlon Registration Link:
August Triathlon Registration Link:
September Triathlon Registration Link:

A Triathlon Training Camp is being offered so that beginners can prepare for the races. Though Round 1 of Tri Camp is already in progress, Round 2 is starting 1730 on July 23 at the Osan Fitness Center! Tri Camp meets weekly for 6 weeks and covers ALL the basics of each discipline. Camp participants get to do a mini triathlon on their last day to ensure they are prepared and confident!

Tri Camp Details
  • Meets weekly on Thursday evenings
  • Coach Lynn will teach basics of each discipline and lead a workout
  • Classes are geared toward beginners, but all levels are welcome
  • Ready to race the Osan Sprint Tri on 29 August!!
Round 2 Tri Camp Schedule
  • July 23, 1730-1900: Equipment & TRI basics
  • July 30, 1700 – 1830: Swim
  • August 6, 1730-1900: Bike
  • August 13, 1730 – 1900: Run
  • August 20, 1730-1900: Transitions
  • August 27, 1730-1900: Fueling & Mini-Tri
Tri Camp Cost & Registration
  • $150 per person for all 6 classes
  • Pay at Osan Fitness Center Front Desk, cash or check only

Registration for Round 2 of Tri Camp is via this link:

***If you are unable to attend all 6 sessions and would like to come to a single class, please email***

Meet Our Trainer: Lynn Mattix
Athletics and Fitness Association of America (AFAA) Certified Personal Trainer and Triathlon Coach

Lynn is a certified Group & Personal Fitness Instructor and Running Coach. She loves helping people push out of their comfort zone and embrace fitness as a way of living. She has been teaching and coaching for 10 years.

She was the 2015 Guam National Triathlon Champion, 5th overall female at Conquer the Wall Adventure Marathon and is currently an Ironman All World Athlete. Lynn is an Air Force veteran, military spouse, and mom of two budding endurance athletes.

Contact Lynn at 010-9529-0049 or stop by the Osan Fitness Center front desk for more information.

For more information, please visit the Fitness Center at Bldg. 1423 or contact DSN 784-5568 during manned hours.

Manned Hours of Operation:
Monday-Friday: 0500-2000
Saturday-Sunday: 0800-1700

Check out for other events, classes, amenities, and more!