Plänterwald, Protected forest area in Treptow-Köpenick, Germany.

Plänterwald is a protected forest covering roughly 90 hectares between Alt-Treptow and Baumschulenweg in southeastern Berlin. The area runs alongside the Spree River and features mixed woodlands with numerous paths for walking and cycling.

Between 1823 and 1840 the Plänterwald was part of the Cöllnische Heide, then largely clear-cut for firewood. From 1876 to 1884, under garden director Gustav Meyer, foresters replanted trees; the Treptower Park was laid out as a public park. It became a landscape protection area in 1998 and has belonged to Berlin's forestry authority since 1988.

The forest serves as a gathering place where people from the surrounding neighborhoods come to run, walk, and spend time outdoors. The paths through the trees are woven into the routines of local residents seeking a break from urban life.

The forest has multiple entry points and well-maintained paths for visitors to explore. Sturdy shoes are recommended for walking, and bringing water is sensible for longer visits.

The Spreepark grounds beside the Spree do not belong to the protected area, even though they sit right next to it. The Eierhäuschen, a former excursion restaurant, stands on the riverbank at the northern edge of the forest.