This trail system has many loops with a section for dirt jumping.
How to get there:
Take I-94 to Tower Road. Once on Tower take a left on Frontage Road, look to your left and shortly you will see a gravel path leading into the woods. If you hit an intersection on frontage you have gone too far.
To get to the dirt jumps stay on the main path until you see a fork in the path after the broken pav