Shagbark Hickory

I came across this tree in Outlot 1 (according to the map), and immediately thought Shagbark Hickory (Carya ovata). That bark exfoliating in large strips is a dead giveaway. I saw more of the bark on the ground.

To confirm the ID, I needed to find some nuts. I spotted these on the ground:

Flipping them over, I found that a squirrel had already eaten the meat inside:

This majestic tree toward over me and had a surprisingly small canopy at the top. I imagine other big trees must have been near it in the past, restricting its canopy spread. It's also toward the northern limit of its range here in Iowa City, so perhaps that restricts its growth as well.