I have tried to plot a more detailed route. To view the map you can
zoom in and in areas where there appears to be no road swicth to the
Satellite view and you'll see the bike paths appear. Sonce the google
satellite pictruers are old some areas show a dirt path. All of these
have been paved in the mean time, so the whole route will be on paved
roads/paths.
I did as best as I could to gather the route from the original PDf,
but it may slightly differ in a few spots. The total is 11 miles, with
a possibility of skipping the Galleria-Diamond Oaks loop.
There also will be several regrouping points. Speed is not required
(so leave your EPO at home).

Here is the google map route:
http://www.gmap-pedometer.com/?r=390085


bjorn