Skyline Trail

Skyline Trail is a 6.7-mile point-to-point descent from the Science City access on Haleakalā’s summit flank to a lower access in Kula Forest Reserve. It follows the southwest side of the volcano from nearly 9,700 feet down to about 6,500 feet. Allow four to five hours on foot. I’d choose it for a long, open volcanic traverse if you already have a pickup arranged at the lower end; this is not a loop.

Park near Puʻu ʻUlaʻula in the summit area, then walk back down to the highway and west to the signed Skyline access by the telescope complex. Stay out of the telescope facilities and pass through the marked gate onto the state route. The trail continues far below the summit, so arrange a ride or a second car at the lower reserve access before starting. There are no services at the upper access, and no water source is documented along the route. To enter the Summit District from 3 to 7 a.m., you need a sunrise reservation.

Much of the walk follows broad, rough dirt-road tread across bare volcanic ground. The route crosses a rift with more than a dozen cinder cones and craters. At Kanahau, around 8,600 feet, the māmane tree line ends; farther down, native scrub grows denser and more varied. Mountain bikers use parts of the same route, so stay on the visible line and watch for other trail users.

On a clear day, Mauna Kea and Mauna Loa can rise above the cloud deck, with West Maui opening farther down. The cones and broken lava give the descent a different feel from the summit overlooks. If the clouds lift, frame a cinder cone in the foreground to show how the slope falls away below you.

The route begins close to 10,000 feet, where thin air can make a steady descent harder than the mileage suggests. The upper slope is open and exposed, and cold, wind, rain, and strong sun are all possible. Hunting is part of the reserve’s use: wear bright colors, stay on the marked route, and pass north of Puʻu Kanahau rather than climbing it. Dogs are allowed on leash on the state route.