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Hawaii Route 31
Hawaii Route 31
Pi'ilani Highway
	Route 31 highlighted in red
Route information
	Maintained by HDOT
Kihei segment
Length	7.2 mi (11.6 km)
North end	Route 310 / Route 311 in Kihei
South end	Wailea Ike Drive in Wailea
Kaupo segment
Length	22.4 mi (36.0 km)
West end	Route 37 near Kula
East end	Route 360 in Haleakala Nat'l Park
Location
Country	United States
State	Hawaii
Counties	Maui
Highway system
	Routes in Hawaii;

Hawaii Route 31, also known as the Pi'ilani Highway, is a 38-mile road^[1]^[2] on the island of Maui in Maui County, Hawaii, United States.

Description

The route begins in at an intersection with Hawaii Routes 310 and 311 in the East Maui town of Kihei. The highway formerly ran parallel to the coast all the way to the southern terminus of the Hana Highway (Route 360), until developments in Wailea and Makena blocked access. The Kihei section of the highway now terminates in Wailea, and the much longer Kaupo section, which is mostly a one-lane, winding road, is county-maintained as County Road 31, connects Route 37 near Kula to the Route 360 south of Hana (at the western border of Haleakala National Park).

Major intersections

The entire route is in Maui County.

Location	mi ^[1]^[2]	km	Destinations	Notes
Kihei	0.0	0.0	Route 310 north (Kihei Road) / Route 311 north – Kahului, Airport, Lahaina	Southern termini of Routes 310 and 311
Wailea	7.2	11.6	Wailea Ike Drive west – Wailea, Makena	End state maintenance
Gap in route
	16.0	25.7	Route 37 north (Kula Highway)	Southern terminus of Route 37; begin county maintenance
	25.3	40.7	Begin one-lane roadway
Kalepa Gulch	38.4	61.8	Kalepa Bridge
Haleakala National Park	38.4	61.8	Route 360 west (Hana Highway)	Continues east as Route 360
1.000 mi = 1.609 km; 1.000 km = 0.621 mi