Elk Park flag stop to Needleton flag stop between Durango and Silverton

[tnmule20 68]

Has anyone ever done the hike from Elk Park flag stop on the Durango and Silverton RR to the Needleton flag stop?

Here is a link.  https://www.alltrails.com/explore/trail/us/colorado/elk-park-to-needleton?mobileMap=false

36 mile point to point.

I know it is beautiful because I have ridden the train a few times.  I think the Scouts would get a kick out of riding the train to the drop off, doing the hike, and then meeting the train to take you back. 

We are low landers and I'm always afraid of altitude sickness.