FYI - The Manitowoc Area Off Highway Vehicle Club has some membership slots open for a limited time, that you may want to check out.
There are at least 4 of us in the club that ride Trials bikes there. It's a nice property to practice trials riding. Jim, Bryan and I have been clearing areas and adding sections as we get time over the past 12 months.
There's a satellite photo/trail map on the facebook site, and pics of the latest improvements to the property.
https://www.facebook.com/maohvc/timeline There are lots of hills, dirt, sand, gravel, woods, rocks, a few boulders, tractor tires, tight trails, a few logs, sink holes, mud, etc. In the next couple of months I will get some pics of some of our trials areas on the MAOHVC facebook site.
It's a good group of guys there. The fee is $150/year, which goes to pay off the property, and taxes. The property is located about a mile or two west of Elkhart Lake, WI, on US 57. Membership is available until its full.
Dave