This was my first hike in 20+ years and it was great. I thought it would be a fairly easy walk and it was. I got a little nervous in the beginning, as there were quite a few sets of handmade stairs, but it was manageable. The beginning of the trail was quite crowded with young people, as it was a rare 60 degree February day. But the further we walked, the less people we saw until we were eventually pretty much by ourselves. I liked going off the main trails and exploring. We ended up in a bog and large field. Also went through the Raptor Center. The entire hike was enjoyable.
Note: it's $5 to park which I was not expecting. Also, the trails and paths aren't labeled so it was quite confusing to me. My friend could figure it out, thankfully so we never got lost. I'd go back for sure.
Glen Helen is one of my favorite places to go hiking, along with neighboring trails in John Bryan State Park. You will see some waterfalls, rock formations, a pine tree forest and creeks. My only complaint is that the trails are not marked. Take a map of the trails along with you if you don't hike these much.