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Hawaii trails · Mauna Kea–Humuʻula Trail

Mauna Kea–Humuʻula Trail

A 4.8-mile out-and-back in Hawaii, with 3,902 ft of climbing. Reaches Waiau and other lake/summit destinations.

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Length
4.8 mi
Elevation gain
3,902 ft
Difficulty
Expert
Max grade
32%
Steepest mile
+1,211 ft
Tread at ≥10% grade
3.9 mi
Shape
out-and-back

Elevation profile

9,324 – 13,227 ft1234

The climbing is spread fairly evenly along the route. It climbs almost continuously, with little descent to recover on.

3-D terrain

3-D terrain view of Mauna Kea–Humuʻula Trail

USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5

Reaches

Getting there

Mauna Kea–Humuʻula Trail access — parking nearby. 19.76214, -155.45641 · directions

Daylight at the trailhead

On October 14, 2026 — the day this page was generated — first light reaches this trailhead at 5:54 a.m., the sun rises at 6:16 a.m. and sets at 5:59 p.m., and the last usable light fades about 6:21 p.m. (HST) — 11 h 43 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 9.7-mile round trip takes roughly 7 h 29 min, so leaving the trailhead at sunrise puts you back around 1:45 p.m. — 4 h 14 min before sunset.

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