More of the Mickelson Trail

For 20 years my friend has taken a group of college students to The Hills for a week of photograhy, drawing and painting. Here's some more pictures with a description:

"The Mickelson has gentle horizontal sweeps through the forests, ravines and valleys. Since it's a railroad bed, the vertical curves are flat, less than 2.5%. The trestles are mining era structures made of beautiful timbers, same character as the pigtail bridges (attached) just southeast of Rushmore."