Took the Arbor Hills Loop (1.3 mi) plus the Tower Trail (1 mi), both paved. This is probably the most nature you'll see from a cement path in the Plano area. The view from the hilltop at the back of the park is breathtaking, and the variety of habitats makes the trip interesting. On this trip, I saw two rabbits, a Painted Bunting, and various other birds. There are also more than 3 1/4 miles of pedestrian-only, natural-surface trails that criscross the park and follow its perimeter, but it's been wet out and I've stayed off of them.