So going off of the drawing in The Engineer and looking at the most recent Map Quest aerial image, this is my idea. Remember the drawing is not set in stone so adjustments could easily be made.
The location of Lake Reneau would be about right, it curves around the new apartments on the left and under the property owned by Temple (cleared land). It would also keep tailgating open on the south side of the lake.
I'll mock up the Arizona possibility when I get home (have Adobe).