Endymion est un cratère de 125 Km et profond de 4600 m. Il est situé près du limbe nord-est de la lune, à l’est de la mer du froid (Mare Frigoris). En raison de sa position, le cratère Endymion a un aspect ovale. Le fond d'Endymion a été recouvert de lave de faible albédo*, ce qui lui donne un aspect foncé. Le plancher est presque lisse et sans particularité. Le mur externe est escarpé, large, et non érodé portant Endymion J (67 Km) à l'Ouest.

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Endymion is a lunar crater that lies near the northeast limb of the Moon. It is located to the east of the Mare Frigoris, and north of the Lacus Temporis. To the southwest is the somewhat smaller Atlas crater. Because of its location, the Endymion crater has an oval appearance from foreshortening. Beyond the crater along the lunar limb is the Mare Humboldtianum.

The floor of Endymion has been covered in low albedo lava, that gives it a dark appearance and makes it relatively easy to locate. The floor is nearly smooth and featureless, with only a few tiny craterlets located within the rim. A string of three lie near the northwestern inner wall. Faint streaks of ray material from Thales crater to the north-northwest crosses the dark floor. The outer rampart is low, wide, and worn from impact erosion.