Hi KCNADO,
Hewen's Creek is a nice ride that puts a premium on bike handling (turning) but not on climbing or descending. The Park is located on an old glacial lake bed and there is very little terrain relief. On the other hand, it is hardly used and so not crowded and there is plenty of wildlife to be seen. Several different types of ecosystem are included on the trail: lowland woods, old field succession, pondside, etc. Some representative photos of the trail at:
http://twitter.com/BikeHewensCreek If you like to fish, bring a rod as the pond has some large bluegill.
For a taste of things to come you could pair a ride at Hewen's Creek with one on the new trail that is being constructed at Rolling Hills Park just 1/2 mile away. You can read about this trail at: <http://www.mmba.org/forum/viewtopic.php?f=48&t=89888&start=15> and see some pictures of it via a link on the latest post. Very different trail, will be more like Maybury.
You could make it a grand slam by also visiting nearby Olson park in northeast Ann Arbor, a nice intermediate level park.
If you try Hewen's Creek I can recommend the Sidetrack Tap in nearby Ypislanti as a good place for a post-ride burger and a beer.
Cheers, Norm (Ann Arbor)