UP 6362 is climbing through the lower half of the long, winding S-Curve known as the Crate Loops. Crater comes from the name of a cinder cone that once dominated the landscape. It was a vent for a nearby (not extinct) volcanic system. The result of the volcanic system was millions of tons of scoria (volcanic rock) that has been mined for decades. In fact, the Denver and Rio Grande Western used the scoria for ballast. You can see the mining operation (which is still active in 2025) in the distance in this shot.
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