Broken Records

Longest tunnel

The current longest tunnel record is 85.1 miles, held by Delaware Aqueduct, set on January 1, 1945. Last checked October 9, 2026.

85.1

miles

Delaware Aqueduct

New York State, USA, 1945

Holder
Delaware Aqueduct
Record
85.1 miles
Metric
137 km
Exact figure
137 km (85 mi)
Location
New York State, USA
Date set
January 1, 1945
Last checked
October 9, 2026

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