To get here, drive up W Canyon View Dr. on the west side of St. George until it ends and becomes BLM land. You'll drop down from the mesa into the desert where you'll see trails going off in every direction.
As you look west from this point, there is a large gap in the land that rises before you. Stay to the right side of this gap and follow the gravel road up toward a water tank and parking lot. Climb to the parking lot (high clearance vehicles can drive to the lot), continue on to the fence at the top of the climb.
At the fence, lift your bike over the bike gate, and get ready for fun. There are signed easy and difficult routes to get you down the Acid Drops. Make your choice and have fun. Once you are at the bottom of the Acid Drops turn left and let it rip. Downhill traffic has the right-of-way on this trail. There is some two-way traffic so be alert.