Some info:

Orion Oaks Home Page

Bark Park Home Page

NOTE: The NEW, north side of the Bark Park opens Saturday, June 4, 2005! This fenced area includes trails and field areas.
It was 7 acres to begin with...I think it's easily double that now.

Now they just need to expand the parking lot.

Here's a cropped version of their PDF file. The Bark Park is circled in green, the parking lot in yellow, the expanded area in red, and the swimming area in blue.