Sauce (hispanicized spelling of Quechua sawsi willow) is one of fourteen districts of the province San MartÃÂn in Peru.
Located in the foothills of the Cordillera Oriental (Peru), the town is 614 m a.s.l. and 51 km south of the Tarapoto city, across the Huallaga River, 6ð42âÂÂ12â south latitude and 76ð15âÂÂ15â west longitude.