Triathlon & Multi-sport

Triathlon & Multisport Training at the Seattle Athletic Club Downtown

Triathlon and Multisport events are one of the fastest growing athletic sports in popularity and participation. Seattle Athletic Club not only offers a facility for training but also the most educated and experienced team of coaches in Washington state and the Pacific Northwest.

Among several certifications (ACSM and NSCA) our coaches are level 1 and level 2 certified as recognized through the USA Triathlon Organization (USAT). Each coach in our team is also a competing pro or elite level athlete. Through their dedicated leadership, our coaches produce athletes who are well equipped to achieve higher standings in local and national race events - from the beginner to the elite competitor, we are capable of leading any level racers to success!

The Seattle Athletic Club Downtown partners with TN Multisports, a USAT team, for its outdoor workouts. This partnership allows our training team to offer 1-3 workouts per week varying from track workouts, open water swims, bike training and trail running - not to mention local race-course previews and clinics. For indoor training (which is required to maintain and build results in the Pacific Northwest) Seattle Athletic Club offers spinning, a pool for swimming laps with numerous swim conditioning classes, private lessons catered to three sports, open water specific classes, run technique workshops, bike fittings and additional preferred pricing opportunities at various multisport retailers for participating team members. Our triathlon training program is the most well rounded and comprehensive program available to any level athlete in the Seattle area.

TN Multisport USAT Triathlon

The triathlon team consists of 150 members of ALL ages and abilities - from first time triathlon sprint racers to Kona qualifiers. The team is supportive of each other on all accounts, making Seattle Athletic Club an excellent choice to take your training to the highest level.

Multisport Programming

Multisport Programming

  • Running Club: The Running Club is complimentary for members. Learn about pacing, the benefit of run drills and the importance of good and consistent stretching in our organized weekly group runs.

  • Seattle Marathon/Half Marathon Training: Whether you are looking to tackle your first half marathon or if you are a seasoned runner looking for structured training to help you PR in this event, our marathon/half marathon training program is for you!

    Our coaches will lead you through a well structured and easy to follow 12 week running program that will provide you a step by step approach to training, allowing everyone to get into great run form for your next marathon/half marathon event.

  • Bike Handling: Not quite comfortable with your riding skills? New to riding outdoors? Or just need a little refresher on your bike handling? Bike Handling 101 will help to improve your bike dexterity, efficiency, overall balance and control, and of course safety. You will learn how to feel in control and respond to “uncomfortable” situations while riding so you are prepared for the unpredictability of the open road and other riders. For all of you tri riders, our coaching can help you with comfortable fueling technique while riding as well as helping you gain confidence when you are training and racing in a group atmosphere.

    Our coaches will put you through drills and teach you skills work that will encourage and challenge you to go out of your comfort zone in order to become a more confident and solid rider.

Multisport Coaches

Teresa Nelson

Teresa Nelson

Teresa Nelson

CSCS, USAT Level II Triathlon Coach
Pro Triathlete
Seattle Athletic Club Downtown Multisport Director

In 2000, Teresa completed a degree in Fitness Management and became certified as an ACSM Health Fitness Instructor, an NSCA Strength and Conditioning Specialist, a Pilates Instructor through the Pilates Studio New York, and a USAT Level II triathlon coach. She continues to advance her training by ongoing webinars, mentorship programs,education, and maintaining her certifications. Teresa is also the founder/owner of the triathlon team TN Multisports.

Teresa swam at the collegiate and national level for Tacoma Swim Club and the University of Nevada Reno. During her youth she was instructed by world re-nowned swim coach Dick Hannula, author of Coaching Swimming Successfully and the the Swim Training Bible. Teresa guides many new triathletes to feeling comfortable in the open water and helps experienced triathletes make improvments in their open water swimming times and abilities.

Her first triathlon experience was Danskin 2001. She recalls the excitement of crossing the finish line for the first time as well as all of the great friends she made at her first race. She has since become a professional triathlete and is enjoying racing alongside the best female triathletes in the world. When she’s not racing she’s cheering on her clients and spectating at various events throughout the year.

Teresa has coached many athletes: from first timers to Boston qualifiers, from sprint and Olympic distance triathletes to half and full Ironman finishers and those qualifing for their triathlon elite licenses. She has a vast array of experience and recognizes that each athlete is different. Teresa aims for each athlete to be the best they can be while balancing their personal life and their athletic career.

Teresa values being surrounded by and working alongside coaches and athletes who share her same motto and goals. She feels truly lucky to be able to do what she loves and continues to learn something new about sports, health, and general fitness on a daily basis.

To begin training with Seattle's best Triathlon & Multisport training team, please contact USAT Level II Triathlon Coach Teresa Nelson at This email address is being protected from spambots. You need JavaScript enabled to view it.

Mark Webb

Mark Webb

Mark has been coaching triathlon for 6 years as his full-time job. He believes anyone can become a successful triathlete if they adopt the three D’s: Desire, Dedication, and Discipline. When not training, he enjoys spending time with his family and friends.

Mark grew up in Seattle playing competitive baseball. After a rotator cuff injury, he switched to competitive golf. In 2003, a friend of Mark’s talked him into doing his first running race, a marathon. 10 marathons later, the same friend talked him into doing his first triathlon, Ironman Canada. He has since completed a total of 7 ironmans along with multiple half iron-man events.

To begin training with Seattle's best Triathlon & Multisport training team, please contact Mark Webb at This email address is being protected from spambots. You need JavaScript enabled to view it.