If you want to get picky, this should be called 'Cretaceous Cache'. The park is home to some dinosaur tracks and fossils that date back 110-115 million years ago to the cretaceous period, as well as some nice hiking and biking trails and different camping options. The trails are in great shape and are well marked. I recommend you pick up a map from the check in gate before you head out.
I have placed a second cache in the park,
Torrential Downpour
check it out if your making the trip.
This could easily be done as a day trip from the DFW area, but I had a great time camping this area.
The cache is an olive drab ammo box packed full! I left a camera in it, feel free to take a few pictures of yourself and your group. Please let me know how many pictures are left when you log your find.
I rate a 3.5 for terrain because the beginning of the hike requires you cross a small river and then some loose rock as you hike up to a slightly higher elevation. Be sure to take advantage of the height, as you will get some wonderful scenic views.
The river crossing is not extreme. In the summer it is possible to cross the river without getting wet. I crossed in water that went just below my knees. The current was not swift and the cool water felt great on my aching feet on the way back. The hike is a little under two-mile round trip.
I put some more details in the hints section that will get you right to the cache.
Happy Geocaching! UPDATE... I did some maintenance this weekend 2/16/2016. Log book replaced and some general cleanup. Cache is in good shape. Cheers!