Matanuska Glacier, the largest valley glacier accessible by car in the United States.
It’s a stable 27-mile long river of ice flowing from the Chugach Mountains north almost to the Glenn Highway.
With a four-mile wide terminus visible from one of Alaska’s major highways, the Matanuska Glacier is the most popular roadside attraction between Anchorage and Glennallen, and tourists flock to the area in the summer for the glacier’s brilliant views and epic treks.