[1] The summit region is typically very cold, and winter storms can deposit up to 2 ft (0.61 m) of snow in January and February.
[3] Astronomical instruments are located near the summit since the atmosphere is substantially thinner at higher elevations than at sea level.
The trailhead is located at the Visitor Information Station of the Onizuka Center at 9,200 ft (2,804 m) (19°45′42″N 155°27′22″W / 19.76167°N 155.45611°W / 19.76167; -155.45611 (Mauna Kea Trail head)).
Since the mountain is considered sacred to the Native Hawaiians, a sign is posted asking visitors to not access the summit cinder cone, which is named Puʻu Wekiu.
Help preserve our cultural and natural landscape and show your respect by not hiking beyond this point to the summit.