Three Forks, MT, to West Yellowstone, MT: the West Entrance is a 110 mile trail located near Ennis, Montana. The trail is primarily used for scenic driving and is accessible year-round.
A gorgeous drive through the Madison River Valley. If you're into fly fishing, there are an abundance of well-maintained fishing access and boat launch opportunities Between Quake Lake and Ennis, MT on the Madison River.
I have done this in late January. Absolutely beautiful. We did everything from snowmobiling from West Yellowstone to skiing our brains out at Big Sky.