New Riders of the Purple Sage is an American country rock band. The group emerged from the psychedelic rock scene in San Francisco, California, in 1969, and its original lineup included several members of the Grateful Dead. Their best known song is "Panama Red." The band is sometimes referred to as the New Riders, or as NRPS.

http://en.wikipedia.org/wiki/New_Riders_of_the_Purple_Sage
http://www.thenewriders.com/
http://www.nrps.net/