Three Rivers Gymnastics Empowering Youth Through Fitness and Gymnastics! Recreational and Teams classes are open for enrollment and classes can be registered through our website http://www.threeriversgymnastics.com Looking for a place to hold a Birthday Party? TRG has openings on weekends for Birthday Parties. Two hours of fun for $90! Three Rivers Gymnastics Empowering Youth Through Fitness and Gymnastics ! Recreational and Teams classes are open for enrollment and classes can be registered through our website http://www.threeriversgymnastics.com Looking for a place to hold a Birthday Party ? TRG has openings on weekends for Birthday Parties . Two hours of fun for $ 90 !