Soon enough the intersection of Highway 87 and gorgeous Sylvan Lake rolls into view. It's beautiful, but chances are that'll be lost in the ominous rumble of dozens of V-twins on Needles Highway (Highway 87). Hook a right (east) onto 87, and throttle down—you'll be in the thick of thousands of motorcycles. That's understandable; this is a bucket-list ride, one that slips through narrow tunnels scoured into mountains, winds past granite Cathedral Spires, and skirts Mother Nature's garden art, the Eye of the Needle. With big elevation changes and serious switchbacks in the mix, be sure to keep your focus. Make it a loop by continuing on 87 until it hits 16A, then hoof it back to Custer for a shower and maybe a Buffalo Burger at the State Game Lodge in Custer State Park on Highway 16. You'll need it.