All three Ys will be closed on April 1 for Easter Sunday.



From classes to lap swimming to good old fashioned open swim, the YMCA of Boulder Valley 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

Baby pool and splash pad are closed for the season.

The pool will be closed for bubble removal May 14-19 (dates may vary depending on weather).

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

Mapleton Y Pool Hours

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

Splash pad is closed for the season.


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



We offer Dive Crew for ages 6 to 17 as well as private and semi-private diving lessons at the Arapahoe Y.

Swim Team


We offer Swim Crew during the school year and pre-team and Sharks Swim Team during the summer.


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