Nature
Rainbow Glacier lies on the northeast slopes of Mount Baker in Washington’s North Cascades, descending to nearly 4,500 feet north of Lava Divide. Midway along its course, it connects to Park Glacier on the south and Mazama Glacier on the west. Its modern history mirrors the shifting pattern of Mount Baker’s icefields. From 1850 to 1950, it retreated 4,494 feet. During a cooler, wetter period from 1950 to 1979, it advanced 1,679 feet, before retreating again by 1,345 feet between 1980 and 2006. These changes make it a clear example of the mountain’s broader glacial fluctuations.
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Washington · United States