Krumm is a short river on the edge of the Swabian Jura of about thirteen kilometers in length. It originates at the base of the Rechberg near the Fuchshof in Rechberg, south of Schwäbisch Gmünd. From there the river makes its way through Ottenbach and Krummwälden up to its confluence with the Fils near Eislingen. The hamlet Krummwälden, which was called in former times as "Welden," carried for some time the name of this river. It was changed to avoid ambiguity.