He also performed and did session work with a variety of musicians, including Van Morrison, Herbie Hancock, Beaver & Krause, Boz Scaggs, Edgar Winter, Gary Wright, The Beau Brummels, Dan Hartman, Tony Williams, The Neville Brothers, Marc Bonilla and Sammy Hagar.

They were signed to Fillmore Records, co-owned by producer David Rubinson and promoter Bill Graham, and toured and opened for major acts.

[7] Montrose and Church also played on the song "Listen to the Lion", recorded during the Tupelo Honey sessions and released on Morrison's next album Saint Dominic's Preview (1972).

For Winter's third album, They Only Come Out at Night (1972), which included the hit singles "Frankenstein" and "Free Ride", Montrose recorded electric guitar, acoustic 12-string, and mandolin.

That incarnation of the band released two albums with Warner Bros. Records, Montrose (1973) and Paper Money (1974), before Hagar left to pursue a solo career.

Montrose then shifted direction and released a solo album, the all-instrumental Open Fire (1978) with Edgar Winter producing.

In 1979, Montrose formed Gamma with vocalist Davey Pattison at the recommendation of fellow Scotsman James Dewar, the bassist/vocalist for Robin Trower.

Jim Alcivar appeared on his fourth Ronnie Montrose project in a row and bassist Alan Fitzgerald returned as well with drummer Skip Gillette.

In 1983, Montrose played lead guitar on the song "(She Is a) Telepath" from Paul Kantner's album Planet Earth Rock and Roll Orchestra although he was not a member of the original PERRO.

In early 2012, the deaths of his uncle and of Lola, his bulldog, worsened what Guitar Player magazine called a "clinical depression that plagued him since he was a toddler."