Yonder Mountain String Band will play a special show en route to Bonnaroo next week in nearby Knoxville, TN. The newgrass quartet has announced a free performance in the citys Downtown Market Square as part of the Sundown in the City music series, the day before Bonnaroos festivities will commence. One Way Track has been tapped as an opener for this one-off spot, set for 7 PM on June 10. Tonight, Yonder kicks off a three night stand at the Mishawaka Amphitheatre in Bellevue, Colorado.