Colorado’s famous 567-mile Colorado Trail got going in the 1980s, thanks to people like Gudy Gaskill, who recruited and worked with hundreds of volunteers every summer. She taught them how to build trail with tools like Pulaskis, and they worked hard during week-long stints in the high country. Now, the trail that spans the Rockies is a beloved institution, and volunteers continue to show up every summer to maintain the trail.