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.


From classes to lap swimming to good old fashioned open swim, the YMCA of Northern Colorado provides aquatic opportunities, safety-focused instruction and family friendly activities at our pools in Boulder, Lafayette, Longmont and Johnstown.

COVID Refund and Credit Policy for Y Programs (Effective 11/4/2020)

The COVID Refund and Credit Policy for Y Programs supersedes the YMCA of Northern Colorado’s existing refund/credit policy. This policy applies to registration in the following programs: Health/Fitness, Sports, Aquatics, Ice, Preschool, Youth and Teen Programs and Adult Programs. This policy does not apply to Y membership or YMCA Camp Santa Maria.


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.

Arapahoe YMCA Pool Hours

Mon-Fri: 5:00am-9:00pm
Sat: 6:45am-8:00pm
Sun: 8:00am-8:00pm

Closed April 24 (at Noon)-May 2 for bubble removal.

Pool Schedule

Ed & Ruth Lehman YMCA Pool Hours

Mon-Fri: 5:00am-7:45pm
Sat: 6:45am-4:45pm
Sun: 8:00am-1:45pm

The Longmont Y pool reopens April 16.

Pool Schedule

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

Johnstown Community YMCA Pool Hours

Mon-Fri: 5:00am-8:45pm
Sat: 7:00am-6:45pm
Sun: 8:00am-6:45pm

Closed May 23-31.

Pool Schedule


The YMCA is the nation’s leading expert in water safety and swim instruction. Along with Ys across the country, we have adopted a swim lesson curriculum that makes it easier for children and adults to become comfortable and safe in and around water. YMCA Swim Lessons begin with the development of basic self rescue skills as well as gaining confidence and ease in the water. From there, swimmers refine the strokes they have learned and progress their skills. The new lessons also include character development, family involvement and safety education components.

The YMCA offers swim lessons for all skills levels for ages 6 month to adult. Join us for swim lessons at our swimming pools in Boulder, Lafayette, Longmont and Johnstown.

Infant Swimming Resource

The Johnstown Community YMCA also offers infant swim lessons through Infant Swimming Resource (ISR). ISR lessons are designed to teach children self-rescue skills in the water through one-on-one lessons.


The YMCA of Northern Colorado is part of the USA Swimming Foundation which strives to ensure that every child has the opportunity to start their own journey to be safer in, on and around the water. 

USA Swimming Foundation



The YMCA Safety Around Water Program, supported by a YMCA of the USA grant, allows the YMCA of Northern Colorado to offer free water safety lessons to hundreds of local children. Kids from local school districts, as well as the Head Start program, come to the Y for lessons to develop water safety, water confidence and self-rescue skills.



303-443-4474 ext. 3500
Email Aquatics