US285 is good two lane highway. It is curvy coming out of Denver. Then you have to decide on Monarch pass or thru Saguache. Monarch is low gear up and down. Saguache route does not have the steep grades but is longer. I use the Saguache route every year but I am headed through NM and TX. If you come through Gunnison on week day you'll have to detour on highway 92. Be aware the highway through the Black canyon of the gunnison (92) is curvy with switch backs (switchbacks for drainages not for elevation), making it slow go, and very slow go with a trailer.@Pilgrim