Khyber Pass | mountain pass | Elephant Pass | Joe Pass | Brenner Pass | Simplon Pass | Yellowhead Highway | 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 |
Although not formally educated, Keefer spent his early years employed as a surveyor on some of Canada’s most important railway works including the Canada Central Railway (Ottawa to Carleton Place), the Chaudière branch of the St. Lawrence and Ottawa Railway, the Canadian Pacific Railway (Yellowhead Pass), and the Canada Atlantic Railway.