Ronald Douglas Montrose (November 29, 1947 – March 3, 2012) was an American rock guitarist, who led the bands Montrose (1973-77 & 1987) and Gamma (1979-83 & 2000) and also performed and did session work with a variety of musicians, including Van Morrison (1971–72), Herbie Hancock (1971), Beaver & Krause (1971), Boz Scaggs (1971), Edgar Winter (1972 & 1996), Gary Wright (1975), The Beau Brummels (1975), Dan Hartman (1976), Tony Williams (1978), The Neville Brothers (1987), Marc Bonilla (1991 & 1993), Sammy Hagar (1997), and Johnny Winter. The first Montrose album was often cited as "America's answer to Led Zeppelin" and Ronnie Montrose was often referred to as one of the most influential guitarists in American hard rock. 　　He continued to record through the 1980s and 1990s, releasing solo albums including The Speed of Sound (1988), Music from Here (1994), and Bearings (2000), as well as another Montrose album titled Mean (1987) and a fourth Gamma album Gamma 4 (2000). 　　Montrose appeared on Sammy Hagar's solo album Marching to Mars (1997) along with original Montrose members bassist Bill Church and drummer Denny Carmassi on the song "Leaving the Warmth of the Womb". The original Montrose lineup also reformed to play as a special guest at several Sammy Hagar concerts in summer 2004 and 2005. Montrose also performed regularly from 2001 until 2011 with a Montrose lineup featuring Keith St. John on lead vocals and a rotating cast of veteran hard rock players on bass and drums. In 2011, Montrose formed the 'Ronnie Montrose Band' with Randy Scoles on vocals, Dan McNay on bass, and Steve Brown on drums, playing music from his entire career, including both Montrose and Gamma songs. This lineup was captured in his final released work, the concert DVD Ronnie Montrose: Live at the Uptown. 　　During his 2009 tour, Montrose revealed that he had fought prostate cancer for the previous two years but was healthy once again;he continued to tour until his death in 2012.