Having procured the approval of the pope for his mission, Trudpert traveled along the Rhine until he came to Breisgau, where he established a hermitage near Münstertal.

A person of rank named Otbert gave him land for his mission about 25 km (16 mi) south of Freiburg in Baden, today a part of the village Münstertal, Black Forest.

[2] Trudpert cleared off the trees and built a cell and a little oratory which later Bishop Martinus of Constance dedicated to Saints Peter and Paul.

[2] According to a tradition that is now discounted, he was murdered while he slept under a pine by one of the serfs whom Otbert had given him in revenge for severe tasks imposed.

The story of his life is full of legendary details that no correct judgment can be formed of Trudpert's era, the kind of work he did, or of its success.