Lubuk Bauk Mosque, Surau in Batipuah Baruah, Indonesia.

Surau Lubuk Bauk is a surau, not a mosque, in Batipuah Baruah, Tanah Datar Regency. It is a square wooden building of surian timber, 13 by 13 metres, raised about 1.4 metres on 30 octagonal pillars. Its three-tiered zinc roof rises to a cross-plan top with four gonjong, and a small octagonal wooden pavilion serves as a minaret. A wide stair of four steps leads to the east entrance, whose lintel carries a carved basmalah.

Construction began in 1896 and was completed in 1901, built on land donated by Datuk Bandaro Panjang to the community. This gift enabled the local population to establish a place of worship that endures to the present day.

Surau Lubuk Bauk is a surau, not a mosque: it belongs to the Jambak clan, whose land Datuk Bandaro Panjang endowed, and it serves as a place for children to learn the Qur'an. In the study room, long wooden boards (reha) are arranged in a circle facing a blackboard. The name Lubuk Bauk comes from the site itself.

The surau sits about a metre below the Batusangkar–Padang road, next to Masjid al-Ula, and is reached by a wide stair of four to six moss-stained concrete steps; shoes are left on these steps. Inside, a doorway on the right of the east entrance leads to a staircase up to the second floor, where a spiral stair in the central pillar continues to the third. Three former ablution pools (luhak) stand in the compound.

The surau appeared in the 2013 Indonesian film The Sinking of van der Wijck, directed by Sunil Soraya, which brought it local fame as a tourist destination. Its octagonal wooden minaret, reached by a spiral stair from the second floor, has false windows glazed on each side and a conical roof stacked like gourds.