Lena Pillars (Russian: Ле́нские столбы́, tr. Lenskiye Stolby; Yakut: Өлүөнэ туруук хайалара, Ölüöne Turūk Khayalara) is the name given to a natural rock formation along the banks of the Lena River in far eastern Siberia. The pillars are 150–300 metres (490–980 ft) high, and were formed in some of the Cambrian period sea-basins. The highest density of pillars is reached between the villages of Petrovskoye and Tit-Ary. The Lena Pillars Nature Park was inscribed on the World Heritage List in 2012.
The site lies around 180 kilometres (110 mi), less than a day's boat ride, upriver (south) from the city of Yakutsk, the capital of the autonomous Sakha Republic.