Bluegrass Returns to the High Desert in 2017! 3 days of Live Bluegrass Music! Come Pick on Route 66! Route 66 Bluegrass Festival Marathon Productions, LLC brings Bluegrass back to the High Desert of Southern California in 2017. For its 3rd year, this festival is on Father's Day weekend at the San Bernardino County Fairgrounds in Victorville, CA. Featuring the very finest bluegrass bands along with all the things you want in a first-class bluegrass festival. June 16-18, 2017