Hoh Glacier, Glacier in Olympic National Park, United States.

Hoh Glacier is an ice mass in Olympic National Park that sits on the slopes of Mount Olympus. The frozen expanse feeds the Hoh River below and dominates the high alpine landscape of the region.

The glacier formed during the last ice age and has shifted in size and shape many times since then. Modern measurements show it is receding like many alpine ice masses around the world.

The glacier is the source of the Hoh River, whose name comes from the Hoh people, a Quileute-speaking tribe of the Olympic Peninsula coast. The river carries the glacier's meltwater west through the Hoh Rain Forest to the Pacific. The Hoh River Trail, the main route toward the ice, follows this river upstream.

The glacier sits at about 1,701 metres on Mount Olympus and is reached via the Hoh River Trail, a route of several days through temperate rainforest. Overnight camping in Olympic National Park requires a permit, and waterproof footwear is needed on the wet trails.

Hoh Glacier is the longest glacier on Mount Olympus, measuring 3.06 miles (4.93 km), yet it holds less ice volume than the nearby Blue Glacier. It lies at an elevation of 1,701 metres and is the source of the Hoh River.