This performance by the New Riders of the Purple Sage on March 18, 1973, at The Felt Forum (in the basement of Madison Square Garden) also boasted numerous appearances by "special friends." When The Sons of Champlin dropped out, NRPS were tapped to open for the Grateful Dead for their remaining performances at the Nassau Coliseum. The Dead returned the favor on their night off by appearing at NRPS's March 18th show, sharing the stage throughout with Ramblin' Jack Elliott, who opening for NRPS. An explosive and unique performance by two iconic American rock bands. Echoes proudly presents the entire WNEW-FM broadcast of this legendary concert. Digitally remastered with background liners and rare photos.