Tree ID-Younger cottonwoods?

[titan23_87]

 

[Huntingisawayoflife]

These look like trees that are on a bluff at our farm. Kind of have a black locust look although the ridges aren't quite the same. Picture this keeps calling them butternut trees on my farm. Interested on everyone's thoughts.

 

[Lucky_P]

Look like black locust to me.
2nd possibility would be sassafras.
Definitely not butternut.