The largest glacier in the contiguous United States located in the Rockies is Jackson Glacier.

Jackson Glacier is the largest glacier in the contiguous United States and is found within Glacier National Park in Montana, a part of the Rocky Mountains. Spanning approximately 1.5 miles in length, it is one of the most accessible glaciers in the park, attracting hikers and nature enthusiasts who wish to witness its majestic beauty. The glacier is a significant component of the park's ecosystem, influencing local hydrology and providing habitat for various wildlife species. However, like many glaciers around the world, Jackson Glacier is retreating due to climate change, highlighting environmental concerns and the need for conservation efforts to preserve this natural wonder for future generations. Its breathtaking surroundings of rugged peaks and alpine meadows make it a key attraction for visitors to Glacier National Park.