Hiking Trails in the area: http://cnyhiking.com/
The link above provides numerous details about quite a few hiking trails. Three of those traverse the DeRuyter area: Finger Lakes, and the Link Trail off of the Finger Lakes headed north and the National North Country Trail.

A generous snowbelt covers DeRuyter in winter providing sledding and skating and keeps business brisk at several nearby Ski Resorts in the area:

DeRuyter Lake offers year-around fishing, swimming, sailing and other boating activities in the summer.

DeRuyter Lake is bordered on its west side by Highland Forest. Highland Forest Park The entrance is near the intersection of West Lake Road and Route 80. It is a large park, nearly two miles long and it has picnic facilities, large group pavilions, camp sites, and cabins. There is also a large all-season meeting/dining facility. There are a number of horse riding, hiking, running and cross-country skiing trails. The air is clean and the attractive rural setting makes for pleasant walking and running. Also the North country Link Trail run throught Highland Forest and crosses DeRuyter Lake Dam and continues Eastward.

Major state parks in the Finger Lakes region and Fayetteville are within a half day drive.

The area is also known for good hunting and snowmobiling.
For more information on the snowmobling in the DeRuyter Area see the following link below.

The village has Masonic Bowling Lanes as well as a number of golf courses in the area.