Embracing a broad section in the southwestern portion of St. Louis is the Southwest Area, which is bounded by Fyler Avenue on the north, Kingshighway on the east, Gravois Avenue on the south and by Highway 44 and the City limits on the west. Its outer edge is rather closely paralleled by the River des Peres drainage works, whose valley creates a general downward slope to the west over much of the area. In earlier years it was drained by two small creeks which flowed into the River des Peres near the present location of Loughborough Avenue. Elsewhere the topography is quite rolling in character, with a high ridge crossing through the eastern portion of Lindenwood. Another high section lies to the south of Fyler Avenue behind the Missouri State Hospital.