Gear Grinder begins at the intersection of Lower Pine
and runs west. It's a twisting trail with numerous rocky sections. Gear Grinder is definitely the chunkiest trail in all of the eastern Otero area.
Regardless of which direction you ride this trail, the amount of climbing and descending is about the same. You'll get a workout in both directions, but riding from north (where it connects to Bear Scat
Trail) to south is a net-downhill route.