This is a very scenic trail system near Dallas. We spent most of our day on the white and blue outter loops. There are a couple bluffviews that overlook the valley that are quite striking. The climbs are not too bad, but I highly recommend staying off the trail in the summer unless you are in peak physical condition. We faced temperatures well over 100 degrees and quickly realized that our water supplies were insufficient.
The trails are well marked as you go.
Clearly, the most outstanding trails include at least one river crossing where you encounter dinosaur footprints consisting of several footsteps and individual imprints that are the size of a small dog.
Wildlife consisted of several birds, lots of lizards, and a few deer.
The trailhead is a short drive from Dallas and can easily be made into a round trip day trip.