The Mountain Jam Music Festival has just announced its second round of performers. Umphrey’s McGee, Grace Potter & the Nocturnals, Charlie Hunter, Big Gigantic, Leroy Justice, Nathan Moore, Carbon Leaf, Pieta Brown, The Wiyos and Spirit Family Reunion have all been added to the event, which will return to Hunter Mountain, in Hunter, NY on June 2-5. These artists will join Gov’t Mule, the Warren Haynes Band, Michael Franti & Spearhead, My Morning Jacket, The Avett Brothers, North Mississippi Allstars, Béla Fleck & The Flecktones, Edward Sharpe and the Magnetic Zeros, Electric Hot Tuna, Mavis Staples, Portugal. The Man, Tim Reynolds & TR3, Toubab Krewe and many others.