Hawaii · United States
Haleakala Crater Road
HI 378Pukalani to Haleakala Summit
The paved road to the top of Haleakala climbs from Maui’s central plain to 3,055 m, gaining more height over a shorter distance than any road on earth, through multiple climate zones to an otherworldly summit crater.
Route 378 begins at its junction with HI-377 near Pukalani and winds up the dormant volcano’s flanks through 32 switchbacks, tropical vegetation giving way to subalpine shrubland and the rust-red cinders of the summit zone. It ends at Pu’u'ula’ula (Red Hill) at 10,023 ft, often above the clouds. A timed reservation is required for sunrise.
Scenery
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Haleakala Crater Road on the map21.2 mi · point to point
Navigate to the start: Apple Maps · Google Maps
Character
Higher than 9 in 10 roads · the most hairpins in the United States, by our count in the catalogue.
Corners
busiest around mile 6Elevation
under 4%4–8%over 8%1,040.9 – 3,042.4 mPoints of interest3 stops
- Leleiwi OverlookViewpoint17 mi in
- Kalahaku OverlookViewpoint18 mi in
- PuʻuʻulaʻulaViewpoint21 mi in
Hazards
- Blind bends
- Steep drop-offs without guardrails
- Altitude sickness above 3,000 m
- Sudden weather and ice at the summit
- Cattle and nene geese on the road
Sources
“The road is paved and well traveled, but it has many curves, switchbacks, blind turns, steep drop-offs and changing weather.”
Verified route: mapped from real road geometry and fact-checked by a human editor. How roads get checked
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