Species:

Pituophis catenifer

Gopher Snake

Some other names for this species:

Gophersnake

Subspecies I've seen:
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Sonoran Gopher Snake
P. c. affinis
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San Diego Gopher Snake
P. c. annectens
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Pacific Gopher Snake
P. c. catenifer
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Bullsnake
P. c. sayi
Subspecies:

Pituophis catenifer affinis

Sonoran Gopher Snake

Pima County, Arizona
Sonoran Gopher Snake (Pituophis catenifer affinis)
Sonoran Gopher Snake (Pituophis catenifer affinis)
This juvenile gopher snake was slowly moving across a road just after dusk. I moved it off to the side of the road, where its camouflage against the desert floor became apparent.
near Benson, Cochise County, Arizona
Sonoran Gopher Snake (Pituophis catenifer affinis)
Sonoran Gopher Snake (Pituophis catenifer affinis)

This large and beautiful gopher snake was stretched out across a dirt road upon which I had recently seen my first wild Gila Monster under the tutelage of my friend Roger Repp. I was on a Gila Monster high and would have been happy if I hadn't seen another herp all day. But I climbed back down to Earth in order to admire this fine snake. It wasn't in a big hurry to get away, but it did make up its mind to meander elsewhere when I got close with my camera. Its front end pulled a slow U-turn and slithered past its stationary back end, until both ends were facing the same way and it vanished leisurely into the desert.

Pima County, Arizona
Sonoran Gopher Snake (Pituophis catenifer affinis)
This is just the kind of thing you want to see when you're driving down a dirt road, looking for snakes. In this case, the snake-shaped object in the road was a Sonoran Gopher Snake.
Cochise County, Arizona
Sonoran Gopher Snake (Pituophis catenifer affinis)
Another morning in southeast Arizona, another gopher snake in the road. This one was resting all kinked up, which some people think is an adaptation to look less snake-shaped to predators.
Subspecies:

Pituophis catenifer annectens

San Diego Gopher Snake

near Campo, San Diego County, California
San Diego Gopher Snake (Pituophis catenifer annectens)
I was out prowling the dirt roads of extreme southern San Diego county looking for leopard lizards, when I spied this fine-looking gopher snake basking in the early morning sun.
Anza-Borrego Desert State Park, San Diego County, California
San Diego Gopher Snake (Pituophis catenifer annectens)
Matt Cage and I futzed with this mild-mannered but extremely uncooperative young gartersnake for quite awhile before giving up and moving on.
North of Mike's Sky Rancho, Baja California, Mexico
San Diego Gopher Snake (Pituophis catenifer annectens)
This large and attractive gophersnake was stretched out in the dirt road when we spotted it. We tried to get photos while it was still in that position, but it got nervous and thought it best to head out into the desert. We on the other hand thought it best that the snake arrange itself into a pleasant non-linear shape and allow us to take pictures as long as we wanted. We had to reach a compromise.
Subspecies:

Pituophis catenifer catenifer

Pacific Gopher Snake

Pine Ridge Trail, Ventana Wilderness, Monterey County, California
Pacific Gopher Snake (Pituophis catenifer catenifer)
This young gopher snake was caught in the act of descending a dead tree trunk. It froze still while I photographed it, nearly vertical.
Fort Ord Public Lands, Monterey County, California
Pacific Gopher Snake (Pituophis catenifer catenifer)
Gopher Snakes are exceptionally placid, gentle-mannered snakes. Unless you're a gopher.
Elkhorn Road, Carrizo Plain National Monument, San Luis Obispo County, California
Pacific Gopher Snake (Pituophis catenifer catenifer)
This beautiful and well-fed adult had been basking on the dirt road in the late afternoon, apparently sharing the myriad burrowing rodents with the local Western Rattlesnakes.
Santa Teresa County Park, Santa Clara County, California
Pacific Gopher Snake (Pituophis catenifer catenifer)
This young gopher snake was stretched across a hiking trail at this rural county park where we had stopped to stretch our dogs' legs. A man coming the other way on the trail had just walked over it without noticing its presence when the snaky shape caught my eye.
Coyote Creek Parkway, Santa Clara County, California
Pacific Gopher Snake (Pituophis catenifer catenifer)
Pacific Gopher Snake (Pituophis catenifer catenifer)
My friend Fred Harer found this attractively marked Gopher Snake under a fairly small rock. The top picture shows the snake in a typical semi-relaxed pose. The bottom picture shows this harmless snake flattening its head, possibly to look more like a venomous rattlesnake. Gopher Snakes are often mistaken for rattlesnakes, which is unfortunately not really conducive to long life in our snake-fearing society.
Coy Flat, Tulare County, California
Pacific Gopher Snake (Pituophis catenifer catenifer)
This large gopher snake was lying partially across the trail in the shady woods. I had already passed right by when my wife spotted it. The day was pleasant but not too warm, and the gopher snake was in no hurry to get out of the way, even with our dog troop passing right by it.
San Mateo County, California
Pacific Gopher Snake (Pituophis catenifer catenifer)
Gopher Snakes have a reputation for being nasty, but all the ones I'd ever come across were either calm and gentle or, occasionally, in a hurry to escape. This was my first experience with the legendary Dark Side of Pituophis catenifer. It performed a very respectable rattler imitation by coiling, vibrating its tail against the dry brush to create a nice rattling sound, hissing almost continuously, and striking repeatedly at anything within about a foot (my hand, a small stick, my shoe, my camera, etc.). This snake did not want to be messed with!
Subspecies:

Pituophis catenifer sayi

Bullsnake

Mammoth Hot Springs, Yellowstone National Park, Park County, Wyoming
Bullsnake (Pituophis catenifer sayi)
This snake was apparently living in the nooks and crannies of a dried-out area of Yellowstone's biggest hot spring. Mammoth Hot Springs is crisscrossed with boardwalk trails, one of which passed within twenty feet or so of this snake's abode. When I came across it, there was already a crowd of 6 or 8 people oohing and aahing. "It's a rattlesnake!" declared one woman to her family.
Bottomless Lakes State Park, Chaves County, New Mexico
Bullsnake (Pituophis catenifer sayi)
My wife carefully avoided squishing this young bullsnake in the road as we headed out of Bottomless Lakes State Park. I went back to photograph it and get it off the road before someone less careful drove by. It didn't seem particularly grateful, and did its best "I am a vicious viper!" impression before I picked it up and released it safely nearby.