De Lambert Falls is a 59-metre waterfall located in the Esperance Valley of Fiordland, New Zealand, reached via a multi-day backcountry route.

Access begins near the Donne River Bridge, from where trampers follow the true left of the Donne River before entering the Esperance Valley.

The surrounding landscape is dramatic, with prominent peaks including Mt Underwood (2,222 m) and Mt Patuki (2,246 m) visible from the valley.

The route to the falls traces a path with historical significance, following in the footsteps of early Fiordland explorers William Grave and Arthur Talbot, who prospected routes through this remote corner of the South Island in the early twentieth century.