California State Alliance of YMCAs 18A612A8-B407-4667-98E0-6C45814FB6EB Main navigation About Main menu About About Our Mission Staff & Board Alliance Members Initiatives Advocacy Find Your Y Main menu Find Your Y Find Your Y Careers Locations Impact Main menu Impact Impact Connected for Communities Partners Search Close All Locations Ontario-Montclair YMCA Find us 909-986-5847 1257 East D St., Ontario CA 91764 Hours ThursdayOpen During Programs See more hours × HOURS Mon - Fri Open During Programs Sat - Sun Closed Visit the Website