I would not choose a single speed for riding in Steamboat but maybe your legs can handle it. Some of the grades can get steep. I am going there in a few weeks and I am bringing a Trek EX8 and a Pivot Mach 429, which are both full suspension 2x10 and 3x9. When I went last year I rented a Rocky Mountain Slayer 50 which was just about the perfect bike for the area but it was a little too much bike for some of the climbs. Last year I arrived the day after they shut down the lifts for the season so it was ride up and ride down all day. I wont make that mistake again this year.