Négra Lock, Lock on the Canal du Midi, France

Négra Lock is a single-chamber lock on the Canal du Midi, 33.3 km from Toulouse, with walls of large pale grey and greenish stone blocks. At the far end, a dark metal gate with vertical ribs holds back the water, which spills over its lower edge in a thin white curtain. A metal handrail with thick grey posts runs along the lower left foreground, and a flat concrete and stone ledge borders the right side.

Négra Lock was built around 1670 on the Canal du Midi, 33.3 km from Toulouse at the Ponts-Jumeaux. It is a single-chamber lock at an altitude of 166 m, ascending when travelling west to east, between Sanglier Lock to the west and Laval Lock to the east. It has been listed as a monument historique since 1998.

The lock's name comes from the nearby hamlet of Négra. In 1971, the area around the lock served as a filming location for the movie La Veuve Couderc, directed by Pierre Granier-Deferre and starring Simone Signoret and Alain Delon.

Négra Lock lies on the Canal du Midi 33.3 km from Toulouse (Ponts-Jumeaux), near Villefranche-de-Lauragais. The chamber is bordered by a flat concrete and stone ledge on one side and a metal handrail along the other, so walkers can follow the canal towpath past the lock. The lock is ascending when travelling west to east.

Négra Lock was one of the filming locations for La Veuve Couderc, the 1971 film adapted from a Georges Simenon novel. The lock has been listed as a monument historique since 1998, and a small chapel stands beside it, while a red-brick aqueduct carries the canal over the Thésauque stream.