Montrose was an influential American hard rock band formed in 1973 by guitarist Ronnie Montrose and vocalist Sammy Hagar. Known for their powerful, guitar-driven sound, Montrose played a critical role in the development of the American hard rock and heavy metal genres. Their self-titled debut album, "Montrose," is considered a landmark in the history of hard rock music. Notably, Sammy Hagar's stint with the band marked the beginning of his successful career, later becoming the lead singer for Van Halen.