I'm thinking elm might be the one. I don't think it's Catalpa. And certainly not pear.
I took a piece over to where my splitter is and I'll try splitting it one of these days.
Catalpa tends to have a rather stout trunk relative to the size of the tree, if that helps. Elm has a long taper all the way out to the tips.
I guess this was recovered from the City's dump zone, so no ground litter is available? ...Otherwise, you'd have some pods on the ground.