Have you done Mule Ears? That's a really cool hike, the scenery changes so much. You should also check out Big Bend Ranch State Park, lots of great things to see there too. The Hoodoos trail is pretty cool, not because of the hiking (it's fine) but the rock formations are super interesting, especially if you're into photography.
Yea. That was the end of the Window trail. I wasn't planning on doing it since my main reason for going was to relax, but the couple that was passing me on a different trail told me it was easy with a nice view at the end, so I went.
I went on two other short trails during my time there and that was it. I don't plan on going back, but thank you for your suggestions. Maybe someone else will try those out.