An opening yardstick would be London City, 1199m paved. There was some landing distance bonus for 5.5 deg approach, but the length also provided a commercial takeoff load.
Alaska operation - Dutch Harbour?, may have been a gravel runway.
There was also a gambling operation in the Caribbean reported to have used 1000m gravel.
1060m rough paved demo landing in E Africa, similar on Indian Ocean Islands with mixed paved and crushed coral - Malindi?
Low pressure tyres may help to reduce landing distance.
These distances used a 1.67 margin as applied for take off; depending on local rules for landing, e.g. actual +15%, then shorter distances could be used (but not with me on board).