Biester-Berg, Mountain summit in North Rhine-Westphalia, Germany

Biester-Berg is a 218 m high hill in southern Lemgo, North Rhine-Westphalia. Its summit area and slopes were used as a military training ground until 1993, and since 2009, 74.44 hectares have been protected as a nature reserve. The terrain includes open grassland, scattered bushes, and mixed woodland.

A small settlement called Bist, probably from Old High German bisut for clearing or village, stood here in the early Middle Ages and was abandoned as Lemgo grew in the late 12th and early 13th century. From 1883 to 1887 the hill passed to the city, which planted spruce on the poor northwestern soils while the south stayed grazed heath. In 1936 the Wehrmacht bought the pasture, and from 1953 British troops ran a tank training area of nearly 50 hectares until they left in 1993.

The name Biesterberg comes from the medieval village of Bist, probably from Old High German bisut, meaning clearing or village; the settlement was abandoned as Lemgo grew in the late 12th and early 13th centuries. The former training ground is now grazed by sheep to keep the dry grassland open, and the Landwehr earthwork along the southern edge is being restored over about 30 metres by the Biologische Station Lippe.

Several marked paths lead to the summit from different starting points and make it easy to reach. Visitors should wear proper footwear and allow about an hour for a relaxed climb with time to enjoy the views.

The Biesterberg's open grassland is kept free of scrub by sheep grazing, a practice that preserves the lean turf where species such as the fringed gentian and the great crested newt live. The hill was a British Army tank training ground until 1993, and the area has been a nature reserve since 2009.