Stewart Park
Buttermilk Falls, Treman State Park and Six-mile Park all offer nice walking/hiking trails. Some have parking fees on weekends and during high season. Cross country skiing is permitted on the golf course in winter. Treman State Park offers a large marina, and there is a large fenced off-leash dog park nearby.There are two outdoor stores in the downtown Ithaca area. The Outdoor Store 206 E State St, Ithaca, NY 14850 (607 273-3891) on the Commons and Eastern Mountain Sports 722 South Meadow Street Ithaca, NY 14850 (607 272-1935) on Route 13 South about 500 yards south of Wegmans. Mountain Edge Outfitters on the Commons recently went out of business.
Also check out Cornell Outdoor Education (http://www.coe.cornell.edu) which has rental equipment and an indoor climbing wall.