Large dinosaur bone- femur? radius?

[Warbreaker]

Found this in Glendive, Hell Creek formation. The ranch most commonly produces triceratops and hadrosaur, but when I looked at skeletons in a museum I couldn't seem to find a match. The first picture shows what appears to be a ball (part of a socket?) on the top back end of the bone. 

 

Any idea? Sorry the pictures aren't very descriptive- I'm a college kid and had to leave the bone at home. I didn't have the time to prep it:( 

[Flx]

That's a pretty cool bone. 
Did you by chance measure the length?

[Warbreaker]

I didn't, but it's probably around 3.5 feet. When I prep it I'll take some measurements^_^. 

 

It was apparently one of the better preserved bones that's come out of that ranch. Roots were growing around it, but for some reason didn't dig into it. 

[Miocene_Mason]

@Troodon

[jpc]

Tibia, but I am not sure whose.  

[Troodon]

The bottom two pictures Look like an Edmontosaurus tibia 

[Warbreaker]

Yup, @Troodon looked up Edmontosaurus tibia and that's exactly it. Here's one from online, it's a perfect match.

 

Thank you!