Cascade de Pisse Vache or cascade de Bombois is a nice waterfall near Bombois, east of Bourg en Bresse, in the region Rhône-Alpes/Ain, France.
From Bourg en Bresse take the D979 to Serrières-sur-Ain. There take the exit to Bolozon (D91) and further north to Bombois. Just after entering the village of Bombois you cross a small stone bridge. Go right before or after the bridge and park your car.
From here it is a 15 minute walk (800 meters) following the river upstream until you see cascade de Pisse Vache. The trail goes up with an ascent of 160 meter.
Cascade de Pisse Vache has a single drop of 20 meters and a total height of 30 meters. Nice to know about the waterfall is that you can walk behind.