Thurlbear Wood and Quarrylands (grid reference ST270210) is a 26.7 hectare (65.8 acre) biological Site of Special Scientific Interest south of Stoke St Mary in Somerset, notified in 1963.

Part of the land designated as Thurlbear Wood and Quarrylands Site of Special Scientific Interest is owned by the Crown Estate.

[1] Thurlbear Wood is a species-rich woodland, formerly managed in a traditional coppice-with-standards system and situated on soils derived from Rhaetic shales and limestones.

The recorded history of the site, its Medieval embankments and the presence of several plants normally confined to primary woods, all suggest that Thurlbear is of considerable antiquity.

The 'quarrylands' are an area of calcareous grassland, and scrub occupying 19th-century workings in Lias limestone.