I have always been fond of this perspective of downtown Denver: this is looking southeast on Speer Blvd, coming down out of the Highland neighborhood:
Shrine Pass was not considered to be a good candidate for development into a primary state highway, so US 6 traffic was directed further south from Copper Mountain, along today's SH 91. Drivers had to go over Fremont Pass and all the way down to Leadville. There, traffic was directed north (overlapped with westbound US 24) over Tennessee Pass and up to Minturn.
In 2001 construction began on Denver's "T-Rex" project (TRansportation EXpansion). This involved widening I-25 and adding light-rail service along the corridor through the south metro area. It was a great investment benefitting Denver commuters, but one unfortunate casualty was the old Colorado and Southern Railway bridge over I-25 (and unmarked US 87), just north of Evans Avenue. The rail line had not been used for years, but its bridge was a cool landmark that provided a little extra character in south Denver.