What a great catch, Tom! It looks like two coal trains paired together to me. You found another great spot to record and captured great video and audio as usual. Thanks for sharing.
thank you for video. we were in Denver last weekend july 30. we were headed back to Denver from Pike's Peak. i think we were around Castle Rock. not sure. it was a huge grassy area to the left of me on I-25 and i saw the longest train. empty coal carts. i think there were two engines at the end of the line, i guess to help push. But we were on a chartered tour and glare was bad so i never could get a good picture. We r from the Carolina's so the long train was awesome.