My mulch grinding friend asked if I wanted some hard maple,logs about 24 inches in diameter.He has tons of wood that he grinds into mulch but he saves some good stuff for me if I want it,no shortage here though. So he only lives three miles from here so he brings about 12 logs about 10 to 12 feet each.They have no bark on them and are light gray very weathered,anyway I took a bite out of one the wood is absolutely beautiful reddish pink,tan,I figured the stuff was ready to burn maybe this year. Anyway I barely made it through 5 logs on a new chain and dullsville,I believe this stuff is as hard as locust and hickory the saw blade was smoking.The stuff is incredibly hard. I'm going to take pictures and post them of these rounds .I'll split them in the spring and burn some maybe next year.