Alatna Valley (sometimes incorrectly spelled Atlanta Valley) is an ice-free valley lying 4 miles (6 km) north of Mount Gran and trending east-northeast for about 10 miles (16 km) along the southeast side of the Convoy Range. It is one of the northernmost of the McMurdo Dry Valleys. Parker Calkin, U.S. geologist, made stratigraphic studies in the valley during the 1960–1961 season.