Hinterzartener Moor, Protected wetland area in Hinterzarten, Germany

Hinterzartener Moor is the largest bog in the southern Black Forest, covering about 82.7 hectares north of Hinterzarten between the Höllentalbahn railway and the B31 road. Its western part is a fen over a glacial basin up to 16 metres deep, with a 300-metre-wide underground lake beneath the peat; the eastern part is a raised bog on both sides of the 890-metre watershed.

The area received protection status in 1941 and expanded in 1975 as authorities recognized the need to preserve these vulnerable ecosystems. The two phases of protection reflected growing understanding of wetland importance.

A 1.8 km educational trail runs through the reserve, lined with 13 panels installed by the state conservation authority in autumn 2022. They explain the bog's formation, its animals and plants, and the history of its use, including the peat cutting and the former landfill.

The area is accessible through marked trails, with some paths suitable for wheelchairs and strollers. Spring and summer offer the best conditions for walking, when paths are dry and plants are in bloom.

The western basin hides a 300-metre-wide underground lake beneath the peat, 3 to 4 metres deep, found by 1976 boreholes. The bog straddles the watershed at about 890 metres, draining west to the Rhine and east to the Danube's former catchment.