I like the 3 mile loop at the State Park. It is very pleasant, winds through the woods, crosses a couple of bridges and it is marked every two or three tenths of a mile so it is easy to pace yourself. There are also no cars to contend with and it is paved, similar in width to the North Custer path. They also have a couple of other paths including a loop that goes by the beach.
I've been staying inside on the treadmill since the last big snow, but I'll go back out there on Saturday when it warms up a little.