Hey FarmerBEN -- have you ever made it to Levis Mounds (in WI)? That's some fun riding! For winter, however, I don't think that it's open to Mt. Bikes; to enjoy it, you'll need to break out the XC skis and/or snowshoes (stay off the tracked ski routes with the shoes). My riding buddies and I make that trek there (approx. 2.5 hrs away from Mpls.) 2 to 3 times a riding season. Great fun indeed...the trail stewards do a great job and are super nice. We had the good fortune to ride with 2 of the 4 the last time we were there (mid-fall).