Note—I'm reviving a very old thread here.

According to The Woody Guthrie Archives (also here), there seem to be 3 copies of a song or songs called DEATH VALLEY SCOTTY among WG's papers and notebooks. It isn't clear whether he wrote such a song himself or merely collected it from someone else.

Allmusic.com doesn't list any song by that title. Neither does ASCAP, BMI, The Online 78rpm Discography Project.

Death Valley Scotty, by the way, was a real person (see Wikipedia), a colorful character whose life might make an interesting song.