Cross Highway 16 and enter the public lands through
the small opening in the gate on the other side of the road. Billy's Hill is
pretty obvious, since it is the oak and grassland covered hill right in front
of you. The best way up is to zig-zag your way up the side of the hill, until
you reach an old fire road that will take you the rest of the way (as shown
on the map, below). Once you make it to the fire road, follow it all the way
to the top of Billy's hill, then up to Cortina Ridge.
Once you are at Cortina Ridge, you will find a fire road that traverses the
entire length of the ridge. If you head South, you can hike all the way to Glascock
Mtn, for fabulous views of Cache Creek Canyon and Fiske Peak.