The Crystal Valley Cross-Country Ski Trail is about 10 miles east of Pentwater, Michigan in the Manistee National Forest, just north of the tiny hamlet of Crystal Valley. It's a couple of hours drive from Kalamazoo and the snow conditions there can be better than Kalamazoo's due to a combination of deeper lake-effect snow and colder temperatures. The trail system is much more extensive than Kalamazoo's local options, easily offering a whole afternoon of skiing.
I teach economics at Kalamazoo College. My wife is also an economist. We were on sabbatical in Europe for the 2014-15 academic year. (Salamanca, Spain, followed by Oxford, UK.) We were in Uruguay for the 2006-7 academic year.