Lamont is a system of low ridges in the surface of Mare Tranquillitatis that is most likely a submerged impact crater.

It was named after Scottish-born German astronomer Johann von Lamont.

Radial ridges radiate away from the center of Lamont, except in the east and west quadrants.

The ridge system is only a few hundred meters in height, with a width that averages 5 km but is thicker to the southeast.

This feature is associated with a mass concentration (mascon), a sub-surface region of higher-density material.