Facility Notices: The Longmont Y pool reopens April 16. The Arapahoe Y pool closed for bubble removal, April 24 (noon)-May 2.

Our Ys are open with newly expanded hours. Please check our reopening guide for programs that still require reservations and policies.



Lap swim (for ages 12+) and family swim (Johnstown Y) are available by reservation only.


Water exercise classes are available by reservation only.


Please check our reopening guide for policies before you arrive.

To help serve our members and community partners, we have made the decision to switch our lap pool to a therapeutic warm water pool. Located in the Mapleton Y in Boulder, Colorado, the pool temperature is set between 90 and 92 degrees. We will be able to offer a wide variety of programs and opportunities in our therapeutic pool, including swim lessons, open swim, lower-intensity water exercise classes, water safety and many therapeutic exercises. 

Benefits of Water Warm Pools:

  • Creates a safe and effective therapy environment
  • Decreases stress on joints and relieves pain 
  • Promotes relaxation, improves flexibility, reduces swelling
  • Helps increase range of motion

Pool Rules & Policies

Mapleton YMCA Pool Hours

Mon-Fri: 7:00am-7:45pm
Sat: 7:00am-4:45pm
Sun: 8:00am-1:45pm

Closed July 5-11.

Pool Schedule

mapleton y pool in boulder



Aqua Zumba

A dance fitness class performed in the water! Exercises will focus on toning arms and legs as well as core strength. The class is fun, energizing and can make you forget that you are working out. No dance experience required.


Water Walking

This is a non-structured time for water fitness. Members are welcome to use the aquatic fitness equipment to achieve a vertical water workout. It’s an ideal way for people of all ages to increase physical strength and endurance without putting undue stress and strain on joints.


Therapy Swim

Designed for people of all ages for therapeutic needs. (Ex. Fibromyalgia, arthritis, debilitating diseases, recent surgeries, etc.). Maximum of two people in each lane.


Group Water Fitness

Excellent for strength training and increasing endurance without the impact of land. This is a medium-impact class that targets range of motion, core stabilization, balance and flexibility. Class uses both shallow and deep end of the pool, however ability to swim is not necessary. Each pool fitness class time is unique, so please try them all to see which one fits your schedule and ability. 


Lap Swimming

Members are welcome to work out on their own during lap swim times. Check the pool schedule for lap swimming times. Reservations required.


Open Swim

Available with limited capacity. We welcome a maximum of 6 members per reservation from the same household; there will be a limit of one reservation per day and three per week per household. Open Swim reservations do not include the use of lap lanes. If your child needs a personal floatation device, please provide your own. You are welcome to use the splash pad (seasonal) during your open swim reservation.


Aquatics: Mapleton Y

303-443-4474 ext. 2501
Email Mapleton Aquatics