Here's the upper deck:
The track exits the outer helix from the lower level and immediately enters the town of Worland, which is directly above Laurel on the lower deck. From there we curve around the end of the peninsula to the semi-resort town of Thermopolis, named and famous for the very large hot springs pools along the Big Horn River. We exit Thermopolis to the left, and curve around the helix and traverse to about halfway (give or take) along the benchwork along the wall at the bottom of the diagram. At this point we come out of a tunnel and we're into the Wind River Canyon. Several short tunnels and a large cosmetic curve later (all true to the prototype), the canyon gives way to high prairie, which we travel through along the right-hand wall to Shobon, which was a junction point to Lander for the CNW. Immediately after Shobon (60 miles or so on the prototype), we pass Powder River, then curve around the peninsula and come into Casper, the real-life headquarters for the Casper sub, and the busiest point on the layout. All trains on the CB&Q mainline and most branchline trains originate and/or arrive here. This is also home to the only engine facility on the layout.
We're almost done - just a little bit more.
Leaving Casper (to the right at the top of the plan), the track curves around follows the right-hand wall. In this area, the track is hidden by low hills in the prairie area, but trains on the track will be visible until they curve around out of sight behind the Wind River Canyon mountains. On the bottom left the train reappears at the siding of Glenrock.
Past Glenrock, the track re-enters the helix, this time on the inner track. It progresses to the lower level again, where it curves follows the inside edge of the bottom benchwork to the town of Douglas. From there it curves around and into Orin Junction. Finally - the circuit is complete!