Woltersdorfer Schleuse, lock in Woltersdorf, Germany

The Woltersdorfer Schleuse is a single-chamber lock with a weir in the municipality of Woltersdorf near Berlin, connecting the Kalksee on the Rüdersdorf side with the Flakensee on the Erkner side. Its chamber was lengthened to 67 metres in 1893, and the average drop is 2.10 metres. A manually operated boat ramp serves rowing and paddling boats.

A first timber weir with a ship passage was built around the middle of the 16th century, 300 metres upstream of today's lock. A second lock with fired-brick walls went up around 1700 about 50 metres east of the present site, and its chamber was filled in after 1882. The current lock was dug into the eastern flank of the Werder from spring 1880, finished in December 1881 and opened on 8 May 1882; its chamber was lengthened to 67 metres in 1893.

The lock is the terminus of the Woltersdorf tram line, and passenger boats moor just south of it. In summer it draws hundreds of water sports enthusiasts, while rowing and paddling boats use a manually operated boat slip beside the chamber. The filled basin of the second lock survives as the square between Hotel Kranichsberg and the mill, marked by a green strip.

The lock chamber is 67 metres long and the average drop is 2.10 metres. Canoes and rowing boats use a manually operated boat slipway instead of the chamber. The lock is the terminus of the Woltersdorf tram, and passenger boats moor just south of it. The pedestrian bridge stays crossable even when the bascule bridge is raised.

The third lock was finished in December 1881 but could not open because no one could agree on a ceremony date. On 8 May 1882 boatman Piper entered the old lock with his two sons, who tore down its lower gate on the way out; at 4:29 a.m. permission was given to use the new lock. The filled basin of the second lock now forms the square between Hotel Kranichsberg and the mill, marked by a green strip.