Eichholzmaar, Volcanic lake in Vulkaneifel, Germany

The Eichholzmaar is a small maar in the Volcanic Eifel on the road between Steffeln and Duppach, with a water surface of about 1.1 hectares and a diameter of roughly 120 metres. Its greatest depth is 3 metres, and the circular rim of the maar bowl is still clearly visible. The basin lies exactly on a geological fault running from northwest to southeast.

At the start of the 20th century the Eichholzmaar was drained to create meadowland. From late summer 2007 to spring 2008 it was restored, and a water surface of about 1.1 hectares was re-established. In the years since, it has become a refuge for rare water birds and reptiles.

The maar lies on the Vulkan-Pfad long-distance trail from Jünkerath via Steffeln and Duppach to Gerolstein. From April to October the local Eifel Club branch runs regular guided walks on Wednesdays. The Steffelner Drees spring about 300 metres upstream and the Aueler Drees about 270 metres downstream are both reached on foot.

The lake is easily reached by walking about 300 meters from the road between Steffeln and Duppach. The path is flat and takes only a few minutes, making it accessible for families and casual walkers.

Two mineral springs, Steffelner Dress and Aueler Dress, flow from the area above and below the lake. These natural springs show that the volcanic region remains hydrologically active today.