If you're looking for a long or short hike, Leadville has it. There are so many trailheads close to Leadville. Easier hikes include Turquoise Lake Trail, Native Lake Trail, or Mineral Belt Trail. If you want to become a true Coloradan though, you can hike a 14er (14,000 ft mountain) like Mt. Massive, Mt. Sherman, or the highest peak in CO - Mt. Evans.