April 28, 2016
Kudos to GROC for getting this park opened up to mountain biking. It's nice to have legal, well marked riding options in and close to Rochester. These trails are both of those.
As others have noted, these trails are not particularly advanced, though there are a few steep sections that can (briefly) test your technical climbing abilities.
It's noteworthy that, although there are technically 9 miles of trails, what you effectively have is one loop of about 3 miles that you can complete with one of 3 different branches (blue, red, orange trails), and there's relatively little to distinguish them from each other. Aside from that, there are a couple of short sections that lead out to trailheads, and that's about it. So this is a nice place to hit for an hour or so after work or any other time that your time is limited. But spend much more than that here and you're likely going to end up getting pretty bored with the repetitiveness of it.