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| Mauna Kea Ice Age Trail | |
|---|---|
| Name | Mauna Kea Ice Age Trail |
| Location | Hawaii Island (Mauna Kea) |
| Length | ~6.5 miles (10.5 km) |
| Highest point | Mauna Kea Summit |
| Elevation gain | ~4,000 ft (1,220 m) |
| Established | 1980s–1990s (recognition period) |
| Difficulty | Strenuous |
| Use | Hiking, snowshoeing, scientific research |
Mauna Kea Ice Age Trail is a high-elevation route on Hawaii Island that traverses glacial and periglacial landforms on the slopes of Mauna Kea. The trail links a series of moraine remnants, cinder cones, and paleosols that record Quaternary glaciation and interglacial episodes across the Pacific Ocean's largest volcanic island. It provides hikers, scientists, and cultural practitioners access to features used in studies by institutions such as the United States Geological Survey, the University of Hawaiʻi at Mānoa, and the Smithsonian Institution.
The trail was developed to interpret and protect Pleistocene ice-age deposits and associated ecosystems on Mauna Kea Summit. It highlights geomorphology shaped during stadials correlated with global events like the Last Glacial Maximum and the Holocene. Interpretive planning involved collaboration among the Hawaii Department of Land and Natural Resources, Office of Hawaiian Affairs, and researchers from University of California, Berkeley and University of Hawaiʻi at Hilo. The route passes near sites of prior fieldwork by glaciologists, paleoclimatologists, and tephrochronologists who published in outlets associated with the American Geophysical Union and the Geological Society of America.
The trailhead is accessed from the Mauna Kea Access Road off Hilo–Waimea corridors, with staging areas near the Onizuka Center for International Astronomy. Public access is regulated by Hawaii County and permit conditions enforced by Hawaiʻi Volcanoes National Park parameters for high-elevation research sites. The route ascends through landmarks including the Puʻu Hauʻoki cinder cone and skirts moraine remnants documented in surveys by USGS teams. Access is seasonal, influenced by winter snowpack studied by researchers at the Mauna Kea Observatories complex operated by consortia such as the Association of Universities for Research in Astronomy.
The trail exposes glacial trimlines, lateral moraines, and till deposits that preserve evidence for alpine glaciation on Mauna Kea during the Pleistocene. Volcanostratigraphic mapping by investigators from Stanford University, University of Washington, and University of Colorado Boulder has integrated radiometric dates, including K–Ar dating, to constrain eruptive sequences and glacial intervals. Tephra layers correlated with regional chronostratigraphy link deposits to eruptions cataloged in the Global Volcanism Program. Paleoclimate reconstructions derived from paleoecological proxies, isotopic data, and sediment cores have been compared with records from the Greenland ice sheet and Antarctic ice sheet to interpret hemispheric climate teleconnections during stadials and interstadials.
Vegetation along the trail reflects elevational zonation documented by botanists at National Tropical Botanical Garden and Bishop Museum. Lowland dry and subalpine taxa give way to alpine cushion plants, lichens, and bryophytes that include taxa recorded by collectors affiliated with the Royal Botanic Gardens, Kew and the New York Botanical Garden. Faunal observations reported by ecologists from University of California, Santa Cruz and University of Hawaiʻi at Mānoa note native invertebrates and avifauna such as species monitored under programs by the Pacific Cooperative Studies Unit and Hawaiian Audubon Society, alongside introduced mammals studied by eradication projects by the Hawaiʻi Department of Land and Natural Resources.
The slopes traversed by the trail contain traditional sites and features associated with Native Hawaiian people and practices recorded by historians at the Bishop Museum and linguists at the University of Hawaiʻi. Archaeological surveys conducted under protocols by the State Historic Preservation Division and archaeologists from University of Hawaiʻi at Hilo documented lithic scatters, ahu, and historic-period trail markers that connect to oral histories curated by the Office of Hawaiian Affairs. Interpretive frameworks integrate consultations with kānaka ʻōiwi stakeholders and cultural practitioners who maintain place-based knowledge and steward wahi kapu on the summit landscape.
Recreation on the trail includes strenuous hiking, amateur snowfield excursions, and guided interpretive walks organized by community groups and providers such as Hawaii Ecotours and research outreach programs at the Institute for Astronomy (University of Hawaiʻi). Conservation initiatives by The Nature Conservancy affiliates, Hawaii Conservation Alliance, and local nonprofits aim to protect fragile alpine habitats and archaeological contexts while coordinating with the Mauna Kea Management Board and land managers from the University of Hawaiʻi. Monitoring programs use standardized protocols from the International Union for Conservation of Nature and regional biodiversity databases to assess impacts from climate change and visitor use.
Management involves multi-stakeholder governance including the Office of Hawaiian Affairs, the University of Hawaiʻi system, Hawaiʻi County, and federal partners like the National Park Service when federal lands intersect. Safety advisories reference high-altitude physiology research from Johns Hopkins University and Mayo Clinic guidance for altitude sickness, with emergency response protocols coordinated with Hawaii State Civil Defense and local search-and-rescue teams such as those of Hawaii Fire Department. Trail stewardship emphasizes Leave No Trace principles adapted through cultural guidelines developed with Hoʻokahua Cultural Center and community hui to ensure protection of scientific, natural, and cultural resources.
Category:Trails in Hawaii Category:Mauna Kea Category:Protected areas of Hawaii (island)