FACILITY NOTICES: The Mapleton Y is closed July 1-7 for annual maintenance. The Arapahoe Y ice rink is closed July 2-3 for construction. The Arapahoe and Longmont Ys are open July 4, 8:00am-6:00pm (no fitness classes or Child Watch).


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 and Longmont. 

Arapahoe Y Pool Hours

Mon-Fri: 5:30am-9:00pm
Sat: 6:45am-6:00pm
Sun: 8:00am-6:00pm

Pool Schedule

Ed & Ruth Lehman Y Pool Hours

Mon-Thu: 5:00am-9:45pm
Fri: 5:00am-6:45pm
Sat: 6:45am-5:45pm
Sun: 8:00am-1:45pm

Pool Schedule

Mapleton Y Pool Hours

Mon-Fri: 5:00am-9:45pm
Sat: 6:45am-7:45pm
Sun: 8:00am-7:45pm

Pool Schedule


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


The YMCA Safety Around Water Program, supported by a YMCA of the USA grant, allows the YMCA of Boulder Valley 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.


Aquatics Department

303-443-4474 ext. 5500
Email the Aquatics Department