The Lafayette Y pool will be closed April 1 (at noon) to May 14 for bubble takedown. The Longmont Y pool will be open 6:45-11am on April 1.


Masters Swim at the YMCA of Northern Colorado was developed to attract a wide range of swimmers — from long-time competitors to adults who are just getting their feet wet. The program caters to those who want to improve swimming technique and take advantage of swimming’s fitness benefits, including lap swimmers, triathletes, those who wish to compete and those who are just looking for an excellent workout. During Masters Swim at the Y, coaches will provide speed and endurance training, motivation, drills, stroke technique and fun workouts to help improve ease and efficiency in the water. The YMCA Masters Swim program is for adults 18+.

Masters Swim is held at the Lafayette, Longmont and Johnstown Ys (availability varies throughout the year).

Swim Gear Suggested

  • Proper competition swimsuit or jammers
  • Goggles 
  • Swim Cap
  • Fins
  • Paddles and pull buoy
  • Snorkel

Swim gear is available for purchase at Swim Outlet. By purchasing your gear from the team store, you will be supporting the competitive swim team programs at the YMCA of Northern Colorado.


Our Masters Swim program is an United States Masters Swimming (USMS) club. You do not have to register with USMS to participate in the Y’s Master Swim program. However, only USMS registered members may participate in USMS events. Login to renew your annual USMS membership or join the Y’s USMS club.

Meet Our Coaches

Dede Griesbauer

After a successful NCAA swimming career at Stanford University where she won multiple NCAA championships, competed for the U.S. National Team and swam at Olympic Trials, Dede discovered the sport of triathlon and quickly found success. Now in her 18th year as a professional triathlete and 16th year of coaching, she currently competes, coaches and does live commentary for IRONMAN events. Dede enjoys sharing her passion for swimming and triathlons with the athletes she coaches and loves helping athletes achieve their goals. Dede coaches at the Lafayette Y.

Julie Dibens

A native of Salisbury, England, Julie swam collegiately at LSU and transitioned into triathlon following graduation. She competed as a professional triathlete for 15 years and represented Great Britain in the 2004 Olympics before getting into triathlon coaching full time. She currently runs her own coaching business, primarily for triathletes but including other endurance athletes as well. Julie’s coaching philosophy is to work hard but have fun at the same time. Her workout groups at the Y are tailored towards more dedicated, disciplined athletes, but all abilities are welcome! Julie coaches at the Lafayette Y.

Ian O’Brien

Ian O’Brien brings a 25+ year coaching resume to the YMCA of Northern Colorado. A native of England, Ian began his coaching career as a volunteer while in school, then he continued to coach while competing in triathlons. Ian now coaches full time and has coached for Team USA in the Olympic Games. During his career he’s led multiple athletes to Olympic medals, world championship medals and podiums at major international competitions. Ian coaches at the Lafayette Y.

Amanda Mullinix

Loveland, Colorado native Amanda Mullinix joins the YMCA of Northern Colorado masters coaching staff with more than 15 years of coaching experience. After growing up swimming for Loveland Swim Club and her middle school and high school teams, she began coaching for Loveland Swim Club. She has also coached at SwimLabs and for another masters swim group in Loveland. Outside of the Y, Amanda is an early childhood para for Thompson School District. She strives to create an environment where all swimmers, regardless of experience, can be successful and have fun together. Amanda coaches at the Johnstown Y.

Katie Kyme

Katie Kyme, a native of Sydney, Australia, joins the YMCA of Northern Colorado masters swim staff with a lifelong background in sports. In addition to coaching kids swimming, running and triathlon, she competed as a professional triathlete until 2019, and then took up full time triathlon coaching. Katie is eager to share her knowledge and experience with swimmers at the Y! Katie coaches at the Lafayette Y.

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