This video review from MotoUSA is pretty good, it looks like they were able to abuse a RZR 4 during a year of testing with minimal problems.

Cooke City Montana, located just outside Yellowstone National Park has a scenic trail system. This trail system will take you to many lakes and fishing opportunities. If you are planning on trying to go ice fishing make sure to check out some ice fishing shelters. Here is a link to the Cooke City Trail Map. […]

I found this link to the Silver State OHV trail maps, the trail is so large that 5 PDF files were needed to cover the whole area. CLICK HERE FOR MAPS www.nvtrailmaps.com