The Navajos settled in an area known as what region Where parts of present-day Arizona Colorado New Mexico and Utah meet.?

The Four Corners area of the American Southwest.

More specifically the Navajo homeland is known to the Navajo as the Dinétah and is centered on the Upper San Juan river basin and the La Plata Mountains to the north and the Lukachukai Mountains (Lókʼaaʼchʼégai) to the west of that. It is surrounded by the four sacred mountains on the borders and centers on the two central sacred mountains.