>>940612I never thru hiked the Lone Star Trail but I do take some day hikes there.
The trail there are not as well kept as others (wilderness and kelly sections) so expect either some vine-like thorny plant that lies across the trail, a lot of foliage, or both. Also you'll encounter that thorny plant many times, especially if you veer off trail to avoid a big puddle. Its not that sharp to make a huge cut on your legs, but you'll get many scratches if you wear shorts and the sound of fabric getting ripped if you wear pants.
I don't know about the spring but in the summer I had issues with spiders making their spider webs at head height (5'11); one day I knocked down 12 spider webs. Spiders, ticks, and mosquitoes are pretty bad in the summer, but they might be dead in the spring. I didn't see any late January of this year.
There are a decent number of creek crossings, usually you just jump across. The bridge in the Magnolia section is down but was replaced with a rotten log last summer, so you may have to cross it if it gave way. If it rains the trail has a good chance to be shoe-deep, but that's usually how it is. Also elevation is flat.
Pic related is the Lake Conroe section late January
