On a clear dry day, any bike, no problem. Get some lights.
In snow, are you still going to ride?
You might want to get a mountain bike, because come on, how could you not have a mountain bike in Colorado?
Trails | Boulder Mountainbike Alliance
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Genesis 49:16-17
"Well, well!" said Holmes, impatiently. "A good cyclist does not need a high road. The moor is intersected with paths and the moon is at the full."
Last edited by Darth Lefty; 01-26-15 at 10:16 AM.