Naturschutzgebiet Eiterbachtal von Wald-Michelbach, Nature reserve in Wald-Michelbach, Germany.

The Eiterbachtal reserve is a protected forest area near Wald-Michelbach where ash and alder trees grow alongside open meadows fed by natural springs. A stream runs through the landscape creating varied flow patterns and a layered floodplain ecosystem.

The reserve was officially protected in the early 1980s through a regional designation. This decision reflected a growing recognition of how important stream valleys like this one are for wildlife and ecosystems.

At the edge of the reserve stand the ruins of St. Maria in Lichtenklingen, a former Marian pilgrimage site in a valley head between the Hardberg (593 m) and the Stiefelhöhe (584 m). Near the chapel "Maria Hilf" botanists recorded sword-leaved helleborine beside heather and germander.

The reserve lies southeast of Siedelsbrunn, a district of Wald-Michelbach, and is split into two parts: a 200-metre spring-creek floodplain near the village and a roughly 2,500-metre stretch of the Eiterbach valley running south to the Baden-Württemberg border. The Eiterbach continues in Heiligkreuzsteinach and flows into the Steinach. The FFH area covers only the stream and a ten-metre strip on each bank, so the meadows and woodland edge lie outside it.

The reserve's two parts differ in size: the spring-creek floodplain near Siedelsbrunn measures about 200 metres, while the Eiterbach valley section runs roughly 2,500 metres south to the Baden-Württemberg border. The stream continues in Heiligkreuzsteinach and empties into the Steinach.