ELDRIDGE, =103.5 m.= (1,538 alt., 100 pop.), named for a pioneer family, is the most westerly town on the route lying within the Central Lowland of the Interior Plains. Between Eldridge and WINDSOR, =112.5 m.= (1,839 alt., 110 pop.), whose name was suggested by that of Windsor, Ont., there is a rise of 300 ft., which marks the division between the Central Lowland and the Great Plains. The Missouri Plateau, as this section of the Great Plains is called, extends beyond the western border of the State. As the route continues into the plateau, the altitude rises slightly to the village of CLEVELAND, =116 m.= (1,849 alt., 273 pop.),--named for Cleveland, Ohio--only to fall away gradually and then rise once more in topping the Altamont Moraine (_see below_.) MEDINA, =124 m.= (1,791 alt., 407 pop.), named for Medina, N. Y., has a strongly Russo-German population. It was originally known as Midway for its position halfway between Jamestown and Steele, and during the first two decades of the century was an important commercial point in the area. At =126 m.= is the junction with ND 30, a graveled highway. Left on this highway to the junction with a graded dirt road, =12 m.=; R. here to the junction with another dirt road, =17 m.=; R. to another junction, =18 m.=; and L. to Lake George, commonly known as SALT LAKE (_swimming_), 19 m., because of its heavy impregnation with natural salts. It is said to be one of the deepest lakes in the State. The southern shore has an excellent sand beach. Northeast of the lake are fresh-water springs; here, on land controlled by the Biological Survey through an easement, dikes and dams have been built to create a fresh-water feeding and nesting ground known as the LAKE GEORGE MIGRATORY WATERFOWL PROJECT. On the southern shore is STREETER MEMORIAL PARK, a World War memorial. At =132 m.= are CRYSTAL SPRINGS LAKES. A cairn (L) houses a spring (_good water_). The lake offers fine opportunity to study varieties of shore birds, as the marshes of the spring-fed waters provide attractive breeding places. CRYSTAL SPRINGS, =132.5 m.= (1,777 alt., 69 pop.), is named for the neighboring lakes. West of Cleveland (_see above_) the route descends in a gentle grade to TAPPEN, =140.5 m.= (1,764 alt., 268 pop.), named for an early settler.