| Chemin de fer Économiques Forestiers des Landes | |
| Image Alt: | Photograph of the station building at Lencouacq in 2011 |
| Status: | Closed |
| Locale: | Landes, France |
| Start: | Roquefort |
| End: | Lencouacq-Jourets |
| Open: | 1907 |
| Close: | 1934 |
| Owner: | Compagnie des Chemin de fer Économiques Forestiers des Landes |
| Linelength Km: | 12 |
| Map Name: | map_name |
| Map State: | uncollapsed |
The Chemin de Fer Économiques Forestiers des Landes was a narrow gauge railway in Landes, France which operated between 1907 and 1934. It was the only gauge railway in France.
The CF Économiques Forestiers des Landes opened in 1907. The 121NaN1 long gauge line ran between Roquefort and Lencouacq-Jourets. It was the only public railway in France built to that gauge. The choice of gauge was said to have been influenced by the purchase of two second-hand 0-4-0T steam locomotives. When narrow gauge railways were first proposed in France, it was intended they could be constructed in either or metre (3 ft 3 in) gauge, however pressure from the French military made metre gauge compulsory in 1888. Later gauge lines were allowed. Traffic declined after 1918 and the line closed in 1934.