A Denali glacier is speeding downhill, potentially hampering climbers and increasing flood risk

Muldrow Glacier on the north side of Denali is surging for the first time since the 1950s — moving 50 to 100 times faster than its usual pace. The surge was first glimpsed by K2 Aviation pilot Chris Palm last month. “I was thinking it looks really difficult to get onto the glacier right now,” Palm said. “It’s all shattered and torn up and jagged ice and deep crevasses everywhere.” The event could impact mountaineers scheduled to use the north approach to the mountain .