http://app.strava.com/rides/10045720
The surface is currently loose (bulldozed) gravel....ranging from VERY loose in some sections, to hard pack in others....not the funnest surface to ride at the moment, but doable if you are (or should be
I've been told that the old railroad bed on the west side of Wixom Rd (between Wixom Rd and Old Plank Rd) will also be included in the eventual completed Rail Trail. That section had the rails and ties removed long ago, and is very rideable as is right now.
When this section is completed, you will be able to ride from South Lyon all the way out to the village of Richmond in Macomb County, with the exception of one short stretch through Pontiac, which is easily ridden on city streets by detouring north to Auburn Rd.