I found this snake skin along a fence in some brush on my land, I know the pics aren't a lot to go on.

This is in south Tulsa, Oklahoma. On 5 acres of regularly mowed grass with about 300 trees. So it isn't rough land, and it is surrounded by a highway, a neighborhood, a street and more manicured land on each side. However, there are plenty of woods within a block in just about every direction. The fence line however is taken over by giant weeds.

The Snake is about 60" and has a girth of about 3-3.5". There are a million crawdads in the land, and plenty of mice that run through the land. I have seen corn snakes, racers, and garters on the land. Some pretty big, but not nearly this big.

Pretty sure it's a harmless colubrid, but just want to make sure it isn't something venomous that's going to hurt my dogs.

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