Geological Chronicle
Mons Hadley is a massif in the northern portion of the Montes Apenninus range in the Moon's northern hemisphere. The peak rises 4.5 kilometers above the adjacent plain, anchored by a base with a diameter of 26.4 kilometers.
The valley directly southwest of the mountain served as the landing site for the Apollo 15 expedition. Astronauts explored and collected samples from the nearby Mons Hadley Delta peak, while Mons Hadley itself was photographed from the surface. To the west of these heights lies Rima Hadley, a sinuous rille that begins at the crater Béla and lies within a diameter of 80 kilometers.
German astronomer Johann Schröter incorporated the name into lunar nomenclature in 1791, honoring the English mathematician and instrument maker John Hadley. The International Astronomical Union formally adopted the designation in 1935.