Address & Contacts 3303 W. 20th Avenue Oshkosh, WI 54904 United States Tel: (920) 230-8439 Directions 20TH AVENUE YMCA 3303 W. 20th Avenue Oshkosh, WI 54904 (920) 230-8439 Directions Hours Mon - Fri: 5 a.m. - 9 p.m. Sat: 7 a.m.-7 p.m. Sun: 7 a.m.- 7 p.m. Contacts Tel: (920) 230-8439 Address & Contacts 3303 W. 20th Avenue Oshkosh, WI 54904 United States Directions 20TH AVENUE YMCA 3303 W. 20th Avenue Oshkosh, WI 54904 (920) 230-8439 Directions Hours Mon - Fri: 5 a.m. - 9 p.m. Sat: 7 a.m.-7 p.m. Sun: 7 a.m.- 7 p.m.