YMCA Camp Onyahsa 5411 East Lake Rd Dewittville, NY 14728 United States Phone +1 716-664-2802 Visit Website Join Donate Find More Ys Hours of Operation Mon - Sun: 12:00am - 12:00am Programs Arts and Humanities Camping and Outdoor Enrichment Health and Well-being International Sports and Recreation Youth and Teen Development Locate 42.23294, -79.440476