yeah, but usually the biking trails are singletrack. It's really mountain biking, but there's often a contingent in the winter that sets up the biking trails so that fat bikes can use them.
Which reminds me... another cheap activity... snowshoeing. that's how a lot of the fat bike trails get packed down to ride on. So it can kind of expand.
There are MTB bike groups all over the state, and then usually fat biking groups are a subset of those.