Help identify this snake

Lots of snakes out right now. We counted 4 the other day on the dirt
roads, including the 5' diamond back I took a video of.

We came across this dead snake at the end of the day, but I can't
identify it

With the arrow shaped head, I would have said red diamond rattlesnake,
but no rattlers. I am leaning towards a Sonoran gopher snake.
Anybody out there knows, please let's us know

Grant