New Riders of the Purple Sage, George Porter Jr. and Runnin’ Pardners, Pink Floyd tribute band The Machine and several other acts have joined the lineup for the 2012 Mighty High Mountain Fest. The three-night run will take place in Tuxedo, NY from May 18-20. Other recent additions include McMule, Wigjam, Reflections, Brother Joscephus and the Love Revival Orchestra, and Matt Reynolds. These acts join previously confirmed performers Dark Star Orchestra, Railroad Earth, Cornmeal, Cabinet and Klyph Black and Rumor Has it. DSO will perform three nights while Railroad Earth will offer two sets.