While I've had less time than usual to spend on TopOSM lately (due to me, and my servers, moving), I just finished re-rendering Colorado with new, fresh data from planet.osm, as well as a few bugfixes thrown in. Among the latter are that ski lifts, aerial tramways and other "aerialways" are now rendered on the map, and that I fixed the bug with disappearing unpaved roads/tracks. As usual, you can check the update at http://toposm.com/co/ Enjoy!