Some really good trails for the intermediate mountain biker. Comes out halway around the lake at a very nice vista. At the vista you can cross into second woods for some really good steep technical riding. A couple of good descents and a couple of good, short climbs.
How to get there:
Take Interstate 88 to Exit 3 (castle creek?) Take a left at the stop sign at the end of the off-ramp and continue on this road until you see the entrance to the park on your left hand side.
After leaving the pay area, stay right and go around the loop, past the ranger's house to left