I think (from the photo URL) that this is the engine sitting under the locomotive hoist at the Alamosa shops in 1958, ready to be loaded aboard a flatcar for the trip to Golden and the then-abuilding Colorado RR Museum. It had previously been displayed at the Narrow Gauge Motel, south of Alamosa.

http://rgsrr.home.comcast.net/picts/rgs ... Klinke.jpg

It was going to Magic Mountain, near Golden, where it was converted to burn oil and operated a couple of years on a loop of track. No. 42 was never taken to the Colorado RR Museum. It's now in Durango.