Markham park is one of the best mountain bike trails in South Florida, and that's saying a lot. There are lots of other great trails down here, but Markham consistently stands out in terms of maintenance, challenges, and overall extensiveness of the trail system.

This video features some first-person go pro footage and general information about the park and trails.
For more information

http://www.broward.org/Parks/MarkhamPark/Pages/Default.aspx#biketrails