As of 2026-10-12, La Trochita tops the list with 402 km.
- #1 La Trochita — 402 km
750mm gauge line in Patagonia, Argentina
La Trochita, in English known as the Old Patagonian Express, is a 750 mm narrow gauge railway in Patagonia, Argentina using steam locomotives. The nickname La Trochita means literally "The little gauge" though it is sometimes translated as "The Little Narrow Gauge" in Spanish while "trocha estrecha", "trocha angosta" in Argentina, is often used for a generic description of "narrow gauge." Read more on Wikipedia.
Wikidata - #2 Hanoi–Lào Cai railway line — 296 km
railway line in Vietnam
Hanoi–Lào Cai Railway is a 296 km (184 mi) railway line serving northern Vietnam. It is a single-track metre gauge line connecting Hanoi with Lào Cai, on the China-Vietnam border in Lào Cai Province. It is the Vietnamese section of the metre gauge Kunming–Haiphong railway. Read more on Wikipedia.
Wikidata - #3 Rudnytsia - Haivoron - Holovanivsk narrow gauge railway — 188 km
railway line in Ukraine
source Wikidata - #4 Iwacewice–Iwanowo–Kamien-Koczirsk Light Railway — 170 km
rail line
The Iwanowo light railway was an approximately 170 km (110 mi) long military light railway with a track gauge of 600 mm from Ivatsevichy via Iwanowo to Kamin-Kashyrskyi with two branch lines to the area west of Pinsk. Read more on Wikipedia.
Wikidata - #5 Kalka–Shimla Railway — 96,000 m
Heritage rail line in India
The Kalka–Shimla Railway is a 2 ft 6 in narrow-gauge railway in North India which traverses a mostly mountainous route from Kalka to Shimla. It is known for its scenic views of the surrounding hills and villages. The railway was built under the direction of Herbert Septimus Harington between 1898 and 1903 to connect Shimla, the summer capital of India during the British Raj, with the rest of the Indian rail system. Read more on Wikipedia.
Wikidata - #6 Plazaolako trena — 94,600 m source Wikidata
- #7 Mariazell Railway — 91,300 m
electrically operated narrow-gauge railway in the Austrian alps
The Mariazell Railway is an electrically operated 760 mm narrow-gauge railway which connects the Lower Austrian capital of Sankt Pölten with the Styrian pilgrimage centre of Mariazell. The line was opened in stages between 1898 and 1907, and had a, now closed, branch to Wieselburg an der Erlauf. The railway is operated by NÖVOG, which is owned by the provincial government, and is a part of the Verkehrsverbund Niederösterreich-Burgenland. Read more on Wikipedia.
Wikidata - #8 Darjeeling Himalayan Railway — 86,000 m
Heritage railway between New Jalpaiguri and Darjeeling, India, also known as the Toy Train
The Darjeeling Himalayan Railway, also known as the DHR, is a 610 mm gauge railway that runs between New Jalpaiguri and Darjeeling in the Indian state of West Bengal. Built between 1879 and 1881, it is about 88 km (55 mi) long. It climbs from about 100 m (330 ft) above sea level at New Jalpaiguri to about 2,200 m (7,200 ft) at Darjeeling, using six zig zags and three loops to gain altitude. Ghum station is situated at an altitude of 2,260 metres (7,410 ft). Six diesel locomotives handle... Read more on Wikipedia.
Wikidata - #9 Alishan Forest Railway — 86,000 m
narrow-gauge railway in Alishan, Chiayi County, Taiwan
Alishan Forest Railway is an 86 km network of 2 ft 6 in narrow gauge railways running up to and throughout the popular mountain resort of Alishan in Chiayi County, Taiwan. The railway, originally constructed for logging, has become a tourist attraction with its rare Z-shaped switchbacks, and over 50 tunnels and 77 wooden bridges. Taiwan's Ministry of Culture has listed the forest railway as a potential World Heritage Site. Read more on Wikipedia.
Wikidata - #10 Anglo-Vasco-Navarro railway — 69,000 m source Wikidata