Hi, Craig -
I don't have any GPS equipment, nor any knowledge as to how to "geotag" my shots.
The first shot, Ferguson's trestle, was taken about 5-1/2 miles southwest of Antonito, a short hike off to the west of a reasonably passable dirt road that roughly parallels the railway.
The second was taken about 1/2 mile west of the Bighorn Wye, accessable via a
very rough dirt road (F.S. #75, IIRC) that departs up a steep hill to the left about 1/2 to 3/4 mile east over the hill from where the third photo was taken, on the fairly good dirt road that leads past M.P. 302. The latter is near the place where the C&TS has a large pile of ballast that is being used to refurbish the line.
Ask the crews in Antonito for instructions on finding these roads from the highways; I've been driving them by instinct for several years, so the landmarks are subconscious and not easy for me to describe accurately.
- Russ