This interactive application requires JavaScript and WebGL to run.
Gunma, Japan (群馬)
Mt. Akagi (赤城山) — Legendary downhill course in Gunma Prefecture with tight hairpins and extreme elevation drop across volcanic terrain. Famous as a 1990s hashiriya hotspot and featured heavily in Initial D, now equipped with Speed Save pavement. Mt. Haruna (榛名山) — Technical lakeside mountain pass in Gunma with mixed-radius corners and a famous five consecutive hairpin section. Renowned globally as the primary setting of Initial D and a historic Japanese drift venue. Usui Pass (碓氷峠) — Historic mountain pass on the Gunma-Nagano border with 184 consecutive curves. A grueling technical course famous for its C121 corner and as the proving ground for Drift King Keiichi Tsuchiya. Irohazaka (いろは坂) — 48 named hairpin curves in Nikko, Tochigi ascending 440m elevation. A permanently divided one-way system making it one of the most technical and dense downhill mountain passes in Japan. Tsubaki Line (椿ライン) — High-speed winding road in Hakone connecting Yugawara to Taikanzan. A legendary route born from the 1980s racer-replica motorcycle boom and documented in Baribari Machine. Nagao Pass (長尾峠) — High-altitude mountain pass in Hakone overlooking Fuji. A classic, narrow pre-war road known for its sweeping views, tight technical switchbacks, and the historic Fujimi Chaya.
Appalachia, USA
Tail of the Dragon (US-129) — 11 miles with 318 continuous curves in the Great Smoky Mountains. Home to the legendary Gap Jedi and Deals Gap. View the leaderboard for the fastest time on the Tail of the Dragon. Hellbender 28 (NC-28) — 22 miles of sweeping curves along Fontana Lake. Devil's Drop (NC-151) — Steep switchbacks near Mt. Pisgah. Copperhead 276 (NC-276) — Winding through Pisgah National Forest. Pisgah Highway (NC-215) — 44 miles climbing to 5,300 ft. Blood Mountain (US-19/129) — Dramatic climb over Neel Gap. Wolf Pen Gap (GA-180) — Blind corners and 10 mph posted speeds. Chasing the Dragon (SR-1127) — Home of the SCCA hillclimb.
Southern California, USA
Little Tujunga Canyon — 13 miles through Angeles National Forest. Glendora Mountain Road — Technical ascent into the San Gabriels. Latigo Canyon — Steep switchbacks from PCH in Malibu. Tuna Canyon — One of LA's most dangerous one-way descents. Stunt Road — Technical connector in the Santa Monica Mountains. Decker Canyon (CA-23) — Steep narrow mountain link in Malibu. Angeles Crest Highway (CA-2) — 66 miles climbing to 8,000 ft, the crown jewel of SoCal. Mulholland Drive — Legendary 21-mile ridgeline road in Los Angeles.
Northern California, USA
Route 9 (CA-9) — 30 miles of winding mountain road through the Santa Cruz Mountains redwoods from Saratoga to Boulder Creek. Kings Canyon Road — Tight blind hairpins descending from Skyline Boulevard in the Oakland Hills. Pinehurst Road — Classic East Bay hillclimb through the redwoods from Montclair to Canyon.
