I'm thinking black locust. I got three-plus cords in the wood shed for burning this year. It's hard, one of the hardest of the North-American hardwoods and has a high BTU rating.

It is very rot resistant, farmers around here used it for fence posts for centuries, some of them lasted unbelievably long. There's a few on the edge of my yard (used to be cow pasture). Decades ago I talked to the farmer that put them in. I figure they're about sixty years old and still solid.

Most of the locust around here looks like what Nate posted. A brown-green color to the wood and lobes rather than a round trunk. Some have a round trunk but all have the same color. It never turns white with cracks like the wood the OP asked about.

Did the bark have bumps on it where thorns had once grew?

Black locust

locust

I don't know...the bark has been gone for years.

Glad I am not the only one who thought grain looked like pine

Only black locust around me are 2-3" diameter and I am working hard to keep them from getting bigger
Cleaning up an old homesite and have quite a brush pile, mostly black locust

It is now

And feels mighty fine this morning!!!

Looks like black locust to me. Burns hot as coal. An axe will bounce off of it when it's green. When it's dry, you can split a huge log with an axe. It's oddly satisfying.

never in 60 some years have I ever saw any variety of locust check like that.

sorta reminds me of persimmon........although it lacks the outer sap wood I normally see in persimmon

One Winter back in the late nineties, I cut about 2 acres of black locust, like that, into 8' and 9' fence posts and firewood. We fenced in 28 acres with the locust posts every other post, with more on the corners. Peeling them was my least favorite part. We let them lay in a wet area to at least May and up to Fall, to make the bark easier to peel. They should have laid longer.

Keith

There is persimmon right beside this tree. Im not familiar with persimmon. Is it hard, heavy good firewood?

This tree laid on the ground for years.