YMA of the Greater Tri-Cities Kennewick YMCA Location & Contact Details 741 S. Dayton StreetKennewick, WA 99336 (509) 374-1109 (main office) (509) 374-1109 x117 (preschool) Preschool Hours M-F 7AM - 6PM Kennewick YMCA Amenities The Kennewick YMCA is a full-day Early Childhood Learning Center. Our preschool is for children ages 2.5-5 years old. Contact us to schedule a tour.