Enter at The Castle Rock Unique Area just south of the intersection of Route 9D and Route 403 (see Wing and Wing 1857 etched on one entrance pillar; Castlerock 1881 on the other). Follow signs to several available parking spots. After walking through the grassy field, turn right on the trail, following the blue markers and then the red markers. You'll know you're going the right way when, early on, you pass a cedar gazebo that is situated to your left. Takes just over an hour for the round trip to the geocache, but 2-3 hours if you go for the scenic view at the top.