I know, I know, the whole UP, right?! Its easy on a sled or atv when your flying at 50 or so mph's and go 50-100 miles a day or afternoon. On a mountain bike, not so much, maybe 20 for me if its level or down hill the entire time. Just want to find a nice 10-15 mile loop that won't kill ya, or better yet, some killer single tracks. If you have to ask what a single track is, then......................moving along. Any ideas would be appreciated.