Kill time

I'm heading down to a family friend's cabin near Uncompagre, and am taking a flight into GJ.

On the way back, the bus that comes from Montrose will arrive about 6 hours before my flight departs.

In that time I won't have a car to get around, and the bus will be dropping me off near the airport. Where can I go to kill time that doesn't require me walking 5 miles across the city? Is there a transit service?