I never did resolve all the missing and faulty dependencies for Cayden's routes. Nice looking routes, but VERY complicated to try to download. Would be nice if everything could be packaged into a less complicated series of downloads.
Surprised nobody mentioned our Darjeeling Himalayan Railway. Grades up to 10%, three loops, and three zig-zags. Takes a total of 8 hours to run from one end to the other at prototype speeds. You go from 440 feet to over 7200 feet in 54 miles. Whatever you can't find on the DLS isn't worth worrying about.