Black Mesa Mountain is the highest point in the U.S. state of Oklahoma. It is located in the Oklahoma Panhandle, in the Black Mesa State Park. The summit of Black Mesa Mountain is officially put at 4,973 feet (1,515.7704 meters) above sea level. The United States of America — also referred to as the United States, the U.S.A., the U.S., America, the States, or (archaically) Columbia—is a federal republic of 50 states located primarily in central North America (with the exception of two states: Alaska and Hawaii). ... Oklahoma is a South Central state of the United States (with strong western and even Midwestern influences) and its U.S. postal abbreviation is OK; others abbreviate the states name Okla. ...