Added - my ankle is screwed, we did day trips from Breckenridge. If you pick a good base of operations (like Breck), there is a lot to see by car and easy hiking. For example, a circle trip from Breck on the rustic unpaved road across Boreas Pass to Como, down through Fairplay, through Alma and across Hoosier Pass back to Breck is a pleasant day of exploration and sightseeing. Breck to Leadville, up through Red Cliff, to Vail and back to Breck is another.