About This Place
Alto Pass is a village in Union County, Illinois, United States. The population was 388 at the 2000 census. The Bald Knob Cross and Bald Knob Wilderness are nearby.
Alto Pass is located at 37°34′11″N 89°19′8″W / 37.56972°N 89.31889°W / 37.56972; -89.31889 (37.569758, -89.318873).
According to the United States Census Bureau, the village has a total area of 2.2 square miles (5.6 km²), of which, 2.2 square miles (5.6 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.92%) is water.