This is a great place to ride, good weather all year round, and nice river side scenery. These are mainly single track, but with many multipurpose connection trails. The trailmarkers are woodburned with names for the trails and difficulty levels there are some technical rides at Cameron. I have heard that it is the 5th best site in Texas to ride. All i know is that i enjoy it.
Take the University Parks exit off of I-35 and head west for about 3 miles you will then enter Cameron Park go straight into the park there are many trail heads, they are fairly well marked, but there is no map available. The trailheads denote difficulty from green to double black.
http://www.singletracks.com/item.php?c=1&i=484