Wildfire is a classic song written by Michael Martin Murphey and Larry Cansler.It was originally recorded by Murphey, who had yet to add his middle name to his recorded work, and appears on his gold-plus 1975 album Blue Sky – Night Thunder.t was originally recorded by Murphey, who had yet to add his middle name to his recorded work, and appears on his gold-plus 1975 album Blue Sky – Night Thunder.