Stamna is a mountain at the northwestern tip of the Koula mountain range. Located in the regional unit of Drama, near the Greek-Bulgarian borders, it is part of the wider protected area of Rodopi. The southeastern slopes of the mountain are covered by the forest of Stamna; within the forest, impressive torrents flow rapidly often forming spectacular waterfalls.

Arkoudorema, a tributary of Nestos, has its sources on Stamna.