re: Montrose to Crested Butte

The one time I went to Crested, I flew into Denver and had to make my way downtown to catch a bus. The bus made it all the way out towards Gunnison or Montrose, then I transferred to a shuttle to get the rest of the way to Crested. Easy process, but took a while. I did just look up the RTA shuttle and it mentions

quote:

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The RTA Free Bus does not stop at the Gunnison – Crested Butte Regional Airport and the buses are not equipped to handle any baggage other than carry on items. Baggage other than ski / snowboard equipment and carry on items are not allowed on RTA buses. For information about ground transportation to the airport, please see our Air Service information page.

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Gunnison Valley RTA

So I think you're stuck with a shuttle. Found a few already, posting links below.
Rocky Rides
Crested Butte Shuttle

ETA: Forgot I had left my winter coat on that first bus ride at the transfer point and didn't realize it until the shuttle to Crested. Ended up skiing in a fur coat, had a nice retro look