Reid Glacier, Alpine glacier on Mount Hood, Oregon, United States

Reid Glacier is an alpine glacier on the west slope of Mount Hood in Oregon, ranging from about 9,800 to 6,000 feet (3,000 to 1,800 m). It is bounded on the north by Yokum Ridge, which also defines the southern side of Sandy Glacier, and on the south by a ridge bounding the north side of Zigzag Glacier. The eastern and upper reaches of this southern ridge include Illumination Rock, and the uppermost part of the glacier lies below Leuthold Couloir. The glacier is the source of the Sandy River and lies entirely within Mount Hood Wilderness.

Reid Glacier is a remnant of the glaciers that formed during the last ice age. Between 1907 and 2004 it lost 35% of its surface area, and its terminus retreated 1,607 feet (490 m) over the same period. It lies entirely within Mount Hood Wilderness, and its meltwater is the source of the Sandy River.

Reid Glacier is the source of the Sandy River, which drains the west side of Mount Hood. The glacier sits entirely inside Mount Hood Wilderness, the protected area that covers the mountain's upper slopes. Its meltwater feeds the river that carries sediment and cold water down from the mountain.

The glacier sits entirely within Mount Hood Wilderness on the mountain's west slope, between the ridges bounding Sandy and Zigzag glaciers, with Illumination Rock on its upper eastern side. The upper glacier holds extensive crevasses, so rope and glacier-travel equipment are needed there. The Sandy River rises from its meltwater.

Reid Glacier is the source of the Sandy River, which begins at its lower end. Between 1907 and 2004 the glacier lost 35% of its surface area, and its terminus retreated 1,607 feet (490 m). The glacier lies entirely within Mount Hood Wilderness.