What's St. Joe's like? There are dozens of trails in Michigan, both lower and upper peninsula. Most have sand, sand whoops, sand hills, or some combination of the three, but you may run across some roots as well, just very few rocks
Check out the trail maps at
http://www.michigan.gov/dnr/1,1607,7...8330--,00.html
If you click on a button you get a one page trail map with parking and other pertinent info listed.