The Ernst M. and Helen S. Ruder Outdoor Waterpark at the East Butler County Family YMCA includes a splash area and two waterslides for kids and adults of all ages to enjoy! The outdoor waterpark is open to all members of Great Miami Valley YMCA and their guests (on select busy days, the waterpark is closed to guests). 

Open Memorial Day - Labor Day

Pool Hours: 

Friday 4pm-7:45pm
Saturday 11am-6:45pm
Sunday 11am-5:45pm

Labor Day 11am-6:45pm (CLOSES FOR THE SEASON)

The outdoor pool closes when thunder or lightning is in the area or if the air temperature is less than 70°F. Updates on closures will be posted on our Faceboook page. 

Swim Policy:

For the safety of our children, a swim policy is strictly enforced. Youth under 16 years old MUST wear a swim band while in the facility. Anyone wishing to take a swim test should talk to a lifeguard. Those who decline to take the test or do not pass the swim test are considered non-swimmers.

  • Red Bands -  (non-swimmers, under 10 years old)
    • A child under age 10 is always within arm’s length of an active adult (18 or older) who is in the water with the child.
    • One adult can have a maximum of three non-swimmers in their care.
    • If a PFD is used, it must be USCG approved.
  • Yellow Bands- (non-swimmers, 10-16)
    • A youth 10-16 must have a parent in the pool area and the child must stay in shallow water while the parent supervises on deck. If the child cannot touch in any area of the pool, an adult (18 or older) will be required to swim with the child.
    • If a PFD is used, it must be USCG approved.
  • Green Bands - Ages 16 years old and under who have passed the swim test.
    • Ages 9 and under must have a parent supervising in the pool area.
    • Ages 10 and up can swim without parents in the pool area. 
  • Water Slide - To ride the water slide, you must be 48" tall or have passed the swim test. 

Guest Passes: 

  • Guest Pass Policy
    • The member bringing the guest must be a member of Great Miami Valley YMCA and over the age of 18.
    • Each member can bring a maximum of three individual guests or one family each day.
    • A waiver must be signed by the guest. If the guest is under the age of 18, the accompanying member must sign the waiver.
    • The guest must be accompanied by a member at all times.
    • A guest may purchase a maximum of six guest passes per year.
  • Guest Pass Rates
    • $10/youth individual
    • $15/adult individual
    • $20/family


In order to best serve members of Great Miami Valley YMCA, we reserve the right to close access to guests and nationwide members when we are close to capacity. Please call (513) 892-9622 in advance if you are visiting or bringing guests to ensure access. 

Nationwide Members will need to adhere to Great Miami Valley YMCA Nationwide Membership policies when visiting.