The Jim Hill River Walk is still used in winter. I found fresh cross-country ski trails but I made the first snow shoe tracks. I was actually passes by a mountain bike with those huge wide tires!
The winter makes it easy to see animal tracks, the top being Whitetail Deer and the bottom a mystery to me.
The frozen Contoocook River is not safe in my opinion, but this ice fisherman didn’t see it that way. Snow shoeing is harder work than I remembered, and I fell once. Getting up in deep snow it very difficult. Plan a shorter loop than you usually walk until you have been out a few times.