Duchess Fall is the bottom end of Princess Falls, after Lang's Creek passes under Highway 403. It is 4.2m high and comes out of a storm culvert from under the highway.
| Location | 79°55'49.854"W 43°14'49.96"N |
| Park | |
| River | Lang's Creek |
| Form | Ribbon Cascade |
| Flow | Year Round |
| Crest Restriction : Access | None : Fairly difficult |
| Foot Restriction : Access | None : Moderately Easy |
| Height : Width (m) | 4.20 : 1.60 |
| Height : Width (ft) | 13 : 5 |
| Authority / Owner | City of Hamilton |