The Midway High Lakes Area lies below the volcanic peak of Mount Adams, and Adams Glacier cascading from the summit in a series of icefalls. It is the second largest glacier in the State of Washington, after Carbon Glacier on Mount Rainier. The area is characterized by several volcanic features in addition to Mount Adams, such as the Takh Takh Lava Flow, the Muddy Fork Lava Flows, and Potato Hill, a small 200 foot tall cinder cone below the Muddy Fork Lava Flows. There are some meadows and marshes, with Takh Takh Meadows being the most well known. Muddy Meadows is another named meadow in the High Lakes Area, near Riley Horse Camp and Muddy Meadows Trail accessing the Pacific Crest Trail and the Mount Adams Wilderness.