The pass was named after Lieutenant John Mullan, the army engineer who first crossed the pass on March 22, 1854, and later supervised construction of the Mullan Road, the first road over the pass, in 1860.
Khyber Pass | mountain pass | Elephant Pass | Joe Pass | Brenner Pass | Simplon Pass | White Pass and Yukon Route | Stampede Pass | Maloja Pass | Usui Pass | Slip Stitch and Pass | Mountain pass | Mont Cenis Pass Railway | Little St Bernard Pass | Grants Pass, Oregon | Second Battle of Elephant Pass | Eagle Pass, Texas | Eagle Pass | Donner Pass | Crowsnest Pass | Chef Menteur Pass | Tejon Pass | Splügen Pass | Sir Lowry's Pass | San Bernardino Pass | Sabine Pass | Pass the Flask | pass | Nelson Pass | Mullan Road |
The Helena Train Wreck occurred in the early morning on February 2, 1989 in Helena, Montana, USA, when 48 cars of a Montana Rail Link freight train that had been decoupled from their locomotives by a train crew on Mullan Pass rolled backwards down the pass, traveling nine miles back into the city of Helena and colliding with a work train at a railway crossing near the center of the community.