I have been coming to this park for the 10 years I've lived near it. I used to walk to the park but now it's part of my regular bike trip on Sunday mornings.
The park is divided into two sections--the walkway section with a children's play area and the ball fields area. The Summerlin website lists the walkway park as 4.6 acres of play area and walking trails and the ball field section as a 12.7 acre park. Both sections have sidewalks.
It makes it convenient to be able to go under Town Center Drive to get to/from the park. The traffic is heavy at times, and this makes a nice shortcut. For walking or biking, the sidewalks go around the large bowl of the ball fields both at the bottom level or along the top rim. There's a set of stairs and a ramp to get to the top rim near the Willows Community Center and pool on the north side of the ball field area.
This place is often busy with walkers getting their exercise, people walking their dogs, and parents watching their kids play.
It's a wonderful place with lots of room.