Oklahoma, United States
Black Mesa extends from Mesa de Maya in Colorado southeasterly 28 miles along the north bank of the Cimarron River, crossing the northeast corner of New Mexico to end at the confluence of the Cimarron and Carrizo Creek near Kenton in the Oklahoma panhandle. Its highest elevation is over 5700 feet in Colorado; in New Mexico it attains 5239 feet; and in northwestern Cimarron County, Oklahoma, it reaches 4973 feet, the highest point in that state.
The summit is believed to have formed many millennia ago when black lava rock coated the top.
In Oklahoma it is home to Black Mesa State Park and Black Mesa Nature Preserve.