Duncan Callahan Interviewed on Adventure Edge Radio

On top of some more adventure oriented topics - the dam that burst in the Grand Canyon and the danger it posed or an interview with Jon Bowermaster, a National Geographic explorer and adventurer - this week’s Adventure Edge Radio takes a look at Karl Meltzer’s attempt to break the speed record for the Appalachian Trail, and also on the trail running version of the Leadville 100, including an interview with the winner Duncan Callahan.