Very small park which is fine enough for a toddler but anything with an older kid will probably have him or her bored in an hour or so.
There are two parking spots, both on Maltbie Rd. The first one drops you by a field which drops you off at the side of the lake protected by the dam. You only have maybe 100ft of water footage before the dam blocks you from moving further. The other one has an ok network of trails, but definitely not that of Webb mountain or Wolfe Park.
This site has a few geocaches