11,218 ft., 29 degrees, snow & ice. That was about all the F150 had in it. After the Eisenhower tunnel heading into Denver, I saw two vanagon westies going up. I'd say, 2nd gear on the floor. The bus (and my wife)are holding up well so far. Also saw a baja bug being towed backwards with a tow dolly behind a giant RV. Ronnie