I think that you should add a front range subdivision route into Train simulator 20XX. I would love it because it could connect to the Sherman Hill add on. Plus there are mountains, gradients and more even a towns like Longmont, Boulder, and Denver! The front range line is operated by BNSF. And some of the line includes a Amtrak California Zephyr. And RTD a Colorado state wide transport company with their trams, etc... and a little of the route is owned by Union Pacific. Therefore that’s why I want The Front Range subdivision in the game.
As much as I would love to see that, I think the Moffat sub from Denver to Granby would be way cooler! Steep mountain grades, tunnels, great scenery. Plus all kinds of different freight from UP and BNSF, and let's not forget Amtrak's California Zephyr and the Winter Park ski train!