Wow, I had been to this park many times back in the day, but I had NO idea they had hiking trails,…read morecaves to explore, and even a disc golf course.
The caves - not really caves, they're more like crevices to explore. They aren't more than 15 feet deep and the sun lights them up fairly well, so don't be 'escared (yes, I said 'escared). Getting to them can be tough if there is water in the normally dry creek bed. You'll have to traverse a VERY steep uphill trail to get to them.
The cool thing about the trails here, is that you get a little bit of everything. Some paved trails, some smooth dirt trails with lots of berms and hills that are great fun for mountain bikers (but won't tear your expensive rig up). Look for these hills near hole 9 on the disc golf course (it's hidden in the woods).
Take Side Trail A (creative name, right?) to get a good view of the creek when there's water in it, and take the Blue Angel Loop if you want to walk or ride on loose river rock.
Signage isn't too bad, but I do recommend printing a map before you go. https://www.universalcitytexas.com/DocumentCenter/View/2544/UniversalCity_TrailMap_11x17?bidId=
The strangest thing is, this park measures the trails in feet instead of miles - what, what??? I've never seen trails measured in feet. If you hit all of the trails, you can get 6 to 7 miles in.
You can park at Red Horse Park, Veterans Park, or at UC Municipal Park - they're all connected to the trails.
I'm amazed at the diversity of the trail system in this park.
And oh yeah, they have a covered basketball pavilion, baseball diamonds, LOTS of space to run around in and even fly kites. No power lines around, so your kite won't get hung up on a line.