La Leche arises off the northern slopes of Mount Choicopico, , at an altitude of in
Ferreñafe Province, of Lambayeque Region. During the rainy season, mid November to mid April, but especially during
El Niño events, La Leche can experience severe flooding, and in some years by the end of the dry season it can almost disappear. but in the 21st century upland dams are being used. The valley of La Leche is variously forested, grassland and agricultural. The largest town along La Leche is
Incahuasi. Both the
Laquipampa Wildlife Refuge and the
Pómac Forest Historical Sanctuary are along La Leche. ==Notes and references==