Just learned when I was there today that they have 3 walking trails - 1 mile, 1.25 miles and 1.5 miles. All sidewalk. Mostly sun.
One goes here for the playground, not the walking path. The playground is better than anything I have ever seen. Lots of areas to play. The ground is made from recycled rubber tires so even though it had been raining for several days, it was not muddy or icky (except in the sand box). And the play set is made from materials that do not get too hot in the summer.
I have read that there is a water feature area for the kids. A friend confirmed this, but I did not see it (I did not search it out, though, either).
Other friends who have been here before say that it can get very very busy, especially with older kids. There is a toddler area where only 2-5 year olds can go, but who knows if the older ones adhere to this. When we were there, there were only 3 other parents (other than the group I was with).
One comment I heard from a mom-friend of mine who has a very energetic young boy - it is difficult to keep an eye on him because there are just so many places to play.