Again, another perk of living in a brand spanking "new" development such as Surprise. This place is so way out there that the city makes its amenities just lovely for it's residents.
I went fishing here during my Thanksgiving visit! Yes, FISHING! The AZ state fish and game have a urban fishing program and this lake is stocked with farm raished and ready to eat fish....if you can catch them. Check the website for full details...there's a lot of them.
http://www.azgfd.gov/h_f/urban_lake_surprise.shtml
Anyways, this big little park is awesome. Everything is newer and well maintained. It has a very large playground area, a library, picnic tables and of course a lake to fish at. And it's across the street from the stadium. When the little kids were bored with fishing they would run over to the playground. When we got too hot, we'd go inside the Library. We spent the whole day there picnicing and fishing with 3 young kids and nobody complained or had a bad time.
Tips: If you're fishing, bring your own chairs as the ones right by the lake have duck crap all over them.
Not much shade so I suspect the summer months out in this park are brutal.