When I first moved to Las Vegas 11+ years ago, this was a place I came to often to walk. Then the first summer hit, and I joined a gym so I could exercise and walk indoors where it was air conditioned. Now, I use this park mainly to ride my bike. It stretches about 1.25 miles from behind Costco just west of Pavilion Center Drive to its end at Hualapai Way.
Parking is only available in one area--on Cotton Bluff Circle just north of Park Run Drive west of Town Center. There are three areas of green--one at the beginning by Pavilion Center, one at Town Center, and one at the end by Hualapai. The Town Center and Hualapai areas have tables where you can sit, have a snack or picnic, and enjoy yourself.
A lot of people use the park for walking their dogs, and as Peter S. said, there will be dogs chasing rabbits in the park. Since it was so cold and cloudy this morning, there were very few people in the park and I saw 8 rabbits as I rode this mile plus. That's more than normal.
This is one of my favorite places. Summerlin was very smart to put a sidewalk and green areas in this arroyo and create a super park!