Longest rail tunnel
The current longest rail tunnel record is 35.5 miles, held by Gotthard Base Tunnel, set on June 1, 2016. Last checked October 9, 2026.
35.5
miles
Gotthard Base Tunnel
- Holder
- Gotthard Base Tunnel
- Record
- 35.5 miles
- Metric
- 57.09 km
- Location
- Uri and Ticino, Switzerland
- Date set
- June 1, 2016
- Last checked
- October 9, 2026
Put it in perspective
At 35.5 miles, it is as long as 1.4 marathons laid end to end.
Gotthard Base Tunnel35.5 miles
A marathon26.2 miles
English Channel, narrowest crossing20.7 miles
Manhattan, end to end13.4 miles
Golden Gate Bridge8,980 ft
Sources
Spotted an error or a newer record? Use the form below with a source link.
Spotted something out of date?
More buildings and bridges records
-
Buildings and Bridges 2,717 ft Tallest building Burj Khalifa · Dubai See record ↗ -
Buildings and Bridges 2,349 sq ft Largest portrait mosaic made from pumpkins and squashes Sunnyfields Farm See record ↗ -
Buildings and Bridges 102.4 miles Longest bridge Danyang–Kunshan Grand Bridge · Jiangsu See record ↗ -
Buildings and Bridges 106 million passengers Busiest airport by passengers Hartsfield-Jackson Atlanta International Airport · Atlanta, Georgia, USA See record ↗