heads in St Elias Mts., 7 mi. SW of Mount Hay, trends E into British Columbia then SE to head of Tarr Inlet at Alaska-Canada boundary, 68 mi. SW of Skagway.
Named by John Muir in 1879. In 1892 Reid (1896, pl. 86 and p. 432), U.S. Geological Survey (USGS), found that the front of the glacier had receded so far as to convert it into three distinct glaciers. He retained the name Grand Pacific for the most northerly and largest, and named the middle one Johns Hopkins Glacier. The smallest and most southerly glacier was named Reid Glacier in 1899 by the Harrington Expedition.