We ride all winter. But choose the better days to be out. Blue sky and sunshine and 20* is OK. Dark overcast spitting snow at 30* is a no go. I ride more in the middle of the day, the warmest part vs early morning or evening rides like I do in the summer. I don't like to put the horses up sweaty, so a early ride allows them time to dry out before it gets cold at night. And we almost never camp over night during the winter months. So most winter rides are close to home. Usually within a 20 minute trailer.
I also change where I ride in the winter months, The mountains are deep in snow, so we head toward the desert more. Antelope Island is an island in the Great Salt Lake. There is a causeway road we use to access the island. The lake acts as a heat sink and it stays a few degrees warmer than areas away from the lake, This melts off the snow faster so it doesn't get too deep. The Island has sandy trails that are easy on barefoot horses. And lots of wild life, Buffalo, Mule Deer, Antelope, Big Horn Sheep and Coyotes.
As winter wanes, we get the bug and start heading out more. We've even made a few camp outs in February.
The snow melts off much faster in the desert area. Here we are the end of February on a trail ride in the San Rafael Swell area of Utah. We are bundled up and the horses are still wooley.