Music On the Mountaintop has confirmed the second round of artists slated for the fourth annual two-day music festival outside of Boone, North Carolina this August 26-27, 2011: 7 Walkers featuring Bill Kreutzmann and Papa Mali; Infamous Stringdusters; Possum Jenkins; Simplified; Major Sevens; Strange Lady and Grand Funktier. These additions to the environmentally conscious festival join previously announced performers: Sam Bush; Railroad Earth; Greensky Bluegrass; Acoustic Syndicate, & more.