They do that at Cameron Park in Waco, TX a lot too. Actually theres a place near here in MI that they do it too... I don't know what the deal is but they are frickin' ruining a lot of nice places for a lot of people.

There are several known gay prostitutes that work in Cameron Park, and a lot of reports of innappropriate behavior right on or close to the trails. I dont think they are just shutting it down to mountain bikes in the above post... sounds like they are cutting off all access, period.