Tara H. on Boulder Park Trail
I think other reviewers have mentioned this, but it is definitely more of a biking trail. Everyone is polite, but make sure you go in the opposite direction. I used to walk my dogs out here; you will need to move out of the way frequently, if you're walking on the weekend. It will be packed.
Pros: lots of variety in difficulty and trail distances. People are very polite and friendly. Very well maintained trails. They have a couple of Porta-potties at the trail start. Picnic tables. Great shade because of all the trees. Convenient location.
Cons: Signage isn't great, distance markers would be helpful. There are Stray dogs, but I know people report these and they are usually picked up Promptly. Parking is tight, and you will likely park on the street if you go on a weekend.
Very good trail if you live in Dallas.
Martin B. on Boulder Park Trail
This is a nice trail designed for mountain bike riders. We hiked it for about an hour loop on an early Sunday afternoon in the middle of July at 100 degrees. There is lots of shade. The trail leads through wooded and open terrain. don't be shy to take the red trail, it goes through a slightly more hilly terrain which makes for a more interesting hike. If you are lucky, like we were, there won't be any mountain bikers. Due to the trail being narrow you can't go next to each other. You can reach the trail head within a few minutes from downtown Dallas just passed the Zoo.