Rounding the final turn off Butte Avenue toward the Slate River Valley at the start of the second and final lap, I had my eyes peeled for a ride. There: the man dressed in a Birkebeiner-esque sweater with suspenders fastened to his Swix pants just beyond the — is that the Jamaican bobsled team? This is Crested Butte’s Alley Loop, titled a “Birkie qualifier with a twist”, a moniker that falls far short of capturing...