Welcome to the MDI YMCA! The current MDI YMCA building was built in 1999 and features 45,000 square feet of space. The communities around the island worked hard to help raise funds for the new building when the old building, on the corner of School Street and Mount Desert Street, suffered a collapsed roof. 


We are proud to offer the following equipment in our Fitness Center:

4 Life Fitness Treadmills
4 Precor Elliptical Trainers
2 Upright Life Fitness Stationary Bikes
2 Recumbant Life Fitness Stationary Bikes
1 Stairmaster
1 Upper Body Ergometer, The Krank
1 Concept Two Rowing Machine
1 Nautalis Assisted Dip and Chin-up Station
13-Station Cybex Eagle Strength Circuit
Complete Free Weight Area Includes: Dumbells, Bench-Press Stations, Smith Machine, Cybex Cable Functional Trainer, and more!


Our gymnasium is full-court, though we have the ability to split the court in half with a screen. 

We offer group exercise classes in the gym along with pick-up basketball, badminton, pickleball, and much more! 

Full-gym or half-gym rentals are available for groups.

Full-Gym: $100/hour

Half-Gym: $50/hour

Contact Jared Erskine, Program Director, to schedule.


The Lenny DeMuro Pool is a six-lane, 25-yard pool. It's home to the Mount Desert Island Shark Swim Team, the MDI High Trojan's Swim Team, and YMCA Swim Lessons.

Pool Schedules are subject to change. Lap lanes are available throughout the day as well as Family and Community swim times. Children under 14 must be swim tested by a lifeguard their first visit to the pool as some areas of the pool are off-limits to inexperienced swimmers. Check our schedule for swim times and our Swim Lessons page for more information regarding the swim test.