The Great Salt Lake basin comprises that part of the Great Basin that drains into Great Salt Lake, Utah. It is about 27,000 square miles in area and includes the northern part of Utah, a small part of eastern Nevada, the southeast corner of Idaho, and the southwest corner of Wyoming.
The eastern part of the area consists of mountainous highlands; the western part chiefly of low-lying plains. The lowest portion of the plain is occupied by Great Salt Lake and minor parts by low mountain ranges. The area has no outlet to the sea.