There's a grade and shelf where CO145 climbs out of a river canyon
https://www.google.com/maps/@38.1291728,-108.2253831,3a,75y,14.94h,67.49t/data=!3m7!1e1!3m5!1ssc2nY3KGYbL8JY_MBeOoTQ!2e0!6s%2F%2Fgeo2.ggpht.com%2Fcbk%3Fpanoid%3Dsc2nY3KGYbL8JY_MBeOoTQ%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D219.74449%26pitch%3D0!7i3328!8i1664!5m1!1e4You've been in the river bottom since Placerville. Here is climbs up to a plateau area around Norwood. It's relatively flat to Bedrock and Paradox.
There's another bit of grade and shelf where CO90 climbs out of the Paradox Valley (headed toward Utah)
https://www.google.com/maps/@38.3500152,-108.9902714,3a,75y,341.91h,86.81t/data=!3m7!1e1!3m5!1sdIZ7Sl6hPYN_7uurIibOJw!2e0!6s%2F%2Fgeo3.ggpht.com%2Fcbk%3Fpanoid%3DdIZ7Sl6hPYN_7uurIibOJw%26output%3Dthumbnail%26cb_client%3Dmaps_sv.tactile.gps%26thumb%3D2%26w%3D203%26h%3D100%26yaw%3D241.34834%26pitch%3D0!7i3328!8i1664!5m1!1e4