This is a relaxing and nice trail that crosses a creek about five or six times (usually near dry during the summer). It goes out, you can keep on going once you get to the small lake or you can come back the way you came.
How to get there:
Go south down Oak Grove Road, which then turns into Castle Rock Road. Pass Northgate High School, and continue about one and a half miles until you reach Castle Rock Park. Go through the park, and get on the trail that starts in the back of the park. Follow the trail through the gate and up the hill. That is the biggest hill that you will go up.