Tustumena Glacier, Mountain glacier in Kenai Peninsula, Alaska.

Tustumena Glacier begins in the Harding Icefield and runs west for about 20 miles (32 km), ending roughly 5 miles (8 km) before Tustumena Lake. Its meltwater feeds the lake, and the glacier is retreating.

The glacier lies on the Kenai Peninsula in western Alaska and originates in the Harding Icefield. Its meltwater feeds Tustumena Lake, and the ice has been retreating. The Alaska Marine Highway ferry M/V Tustumena takes its name from the glacier.

The Alaska Marine Highway ferry M/V Tustumena takes its name from this glacier, carrying the Dena'ina-derived place name along the Kenai Peninsula coast. The glacier sits within the Harding Icefield, whose meltwater feeds Tustumena Lake, and its retreating ice is visible evidence of a warming climate.

The best time to visit is in warmer months when routes become more accessible. Plan for boat travel up Glacier Creek, as there are no roads to reach the glacier itself.

Arctic Lake sits directly against the ice, and its outflow runs underneath the glacier. As the ice moves, the lake periodically fills and then drains, stranding icebergs on the sand. The Alaska Marine Highway ferry M/V Tustumena takes its name from this glacier.