The formation has been heavily eroded and reshaped by a long history of impacts, leaving a low, irregular ridge line around most of the perimeter.

The most prominent of these is the satellite crater Milne K, which is located just to the south of the midpoint.

Overlapping the southern rim of K is the smaller Milne L. In the northeast part of the floor is an unusual tight formation of 10–12 small impacts that almost resembles a cluster of grapes.

Other nearby craters include Alden to the north, Parkhurst to the west, Schaeberle to the northeast, and Bjerknes to the south.

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Milne.