Break out the tie-dye hoodie and slip a pair of socks on with those Birkenstocks: Furthur is closing out the 2011 concert season at Red Rocks with a trio of shows this weekend. Like bottles of wine, guitarist Bob Weir and bass master Phil Lesh seem to get better and better with age. Since the end of the Grateful Dead proper in 1995, the two have kept the band's music going strong through various musical projects. This is the fourth time their latest Dead-esque incarnation, Furthur, has rolled through Colorado since forming in 2009, and tickets have always gone fast. In fact, Friday and Saturday night are already sold out through Ticketmaster. Fans shut out of the first two nights can also try their luck finding a miracle in the traveling circus/marketplace that is the Furthur parking lot, which still resembles Grateful Dead lots of the '80s and '90s, but on a much smaller scale.