Hawaii

Haleakalā or the East Maui Volcano, is a massive shield volcano that forms more than 75% of the Hawaiian Island of Maui. The western 25% of the island is formed by the West Maui Mountains. Unlike Hawaii Island, where the USGS mapped the island into 1 of 9 Lava Flow Hazard Zones, there appears to have been little attempt to differentiate risks for different areas of Maui. The temperature near the summit tends to vary between about 5°C and16°C and, especially given the thin air and the possibility of dehydration at that elevation, the walking trails can be more challenging than one might expect.