If you do want to avoid any steep mountain passes you could take this, my "chicken" route:
Drive to Santa Fe then north on highway 285. The highway will merge west with Highway 160 past Alamosa then goes north again. At Saguache, take highway 114. This is a winding but beautiful road. A couple of hills but nothing too severe. Even I can drive it. It ill lead you to Highway 50 and into Gunnison, always worth a stop. Then you will travel west on highway 50 and swing to Lake City south on highway 149.
Looking at a map you will see that you will travel a bit out of your way but your knuckles will not be white. You will also get to see part of the Blue Mesa Reservoir and Gunnison.