In June 1941, just over three decades after the abandonment of the Alpine Tunnel, Railroad Magazine published an article titled "The Alpine Tunnel Route." The author, Lewis R. Lathrop, was a D&RG fireman who knew South Park trainmen who ran trains over the "hill" through the famous tunnel and swapped stories with them in a cigar store. In fact, he started work with the Rio Grande just two years after the arrival of the DSP&P into Gunnison.
There are some epic stories in here including one in which a crew of trainmen and snow shovelers managed to turn an engine around with hydraulic jacks. I admit, I still don't understand how they did it. Essentially, a snow blockade kept them from getting through the east portal of Alpine Tunnel, but snow had drifted back behind them. They decided they had a better chance at plowing through the line westward back to Pitkin, but...they needed to turn an engine around with a plow on the front.
While discussing some epic snowbucking skills the South Park railroaders possessed, Lathrop, the D&RG man, admitted that the DSP&P had superior equipment to theirs and that the DSP&P railroaders were better skilled at fighting snow. As evidence he tells of a blockade of Marshall Pass where two South Park "hoggers" opened the Rio Grande line themselves.
Lewis A. Lathrop actually, as the article puts it, "crossed the great divide" a few months before publication of this article. His son Gilbert assisted with its completion.
*A few notes: the story of a stalled circus train being pushed by elephants on the Alpine Tunnel route is likely legend.
Also, the article concludes by stating the rails over the pass were pulled in 1917. They were actually pulled in 1923 and 1924.