In case you need another reason to check out Mountain Jam 2013, get this: The festival has added none other than the Lumineers to its impressive and eclectic lineup. The acclaimed Colorado folk-rock trio is known for its killer live performances, and this Sunday, (Feb. 10), they'll take the stage at the 55th Annual Grammy Awards, where they're nominated in two categories: Best New Artist and Best Americana Album.

In signing on for Mountain Jam 2013 -- set for June 6-9 at the scenic Hunter Mountain ski resort in Hunter, N.Y. -- the Lumineers join a roster that includes Phil Lesh & Friends (featuring Warren Haynes, John Scofield, Joe Russo and Jeff Chimenti), Widespread Panic, Gov't Mule (back for the ninth straight year), Primus, Dispatch, the Avett Brothers and Gary Clark Jr.

Early bird tickets, which offer discounts of up to 25 percent, are going fast, and come Thursday (Feb. 7) at midnight, prices will go up. With that in mind, fans who wish to see the Lumineers -- and all the other great acts -- and save a little scratch for the gourmet food trucks ought to buy theirs soon.

Additional Mountain Jam acts will be announced in the coming weeks, so check back at Diffuser.fm for the latest info on who's headed Upstate.