Wow, I grew up around tons of Osage Orange and never saw one anywhere close to that stout! It is such an interesting tree... Striking color/flexibility in the wood and weird fruit.I found this pic on the web.
Black walnut on the right side.
Bark and heartwood look exactly like my tree.
(Left side is osage orange in case anyone is wondering)
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Were you able to save any big lengths of the walnut? I guess even if it's already cut to firewood length, there are lots of nice woodworking options if you're into that.