The Wiese rises in the Black Forest in the Southern Black Forest Nature Park. Its source, the "Wiesenquelle" lies in the county of Breisgau-Hochschwarzwald immediately west of the residential area of Hebelhof in the municipality of Feldberg between the Feldberg (), the highest mountain in the range, to the northwest and the Grafenmatt () to the south-southwest at about . The section of the B 317 from Feldberg Ort via Hebelhof to Todtnau runs past the source a few metres to the north.