Byrds co-founders Roger McGuinn and Chris Hillman have just added a half-dozen new dates on to their 50th anniversary tour celebrating of the band's groundbreaking country album, Sweetheart Of The Rodeo. The 1968 album, which brought the creative vision of then-new member Gram Parsons to the mainstream rock world, is by far considered the most important country rock album of the 1960's, laying the groundwork for the acoustic-based '70s L.A. sound.

New summer and fall shows now in the books include additional nights in L.A. and Albany, New York -- along with newly announced stops in New York City; Boston; Nashville; and Roanoke, Virginia.

Country legend Dwight Yoakam explained to us that the importance of Byrds co-founder Chris Hillman cannot be overstated: "Without Chris Hillman, there is no country rock as we know it came to be known. Without Chris Hillman, you don't have the bridge between Buck Owens and Linda Ronstadt and the Eagles. Without Buck Owens, there's none of that."

AUDIO: ROGER MCGUINN ON RELATIONSHIP WITH SURVIVING BYRDS
AUDIO: DWIGHT YOAKAM ON CHRIS HILLMAN