The website for Rollins State Park has information on use for this park.
In summer, this road takes hikers to a trailhead for Mount Kearsarge. The road has several viewpoints, with great views in different directions. In winter, it is closed to all motorized traffic. This is a great cross country / backcountry workout. The road is just steep enough in places to make it for fun skiing, but not so steep that it is impossible to go up with fish scales or ski down with cross country gear.
There are views at several points along the way, so you do not need to ski the full 7 miles round trip to have fun.