I found this in French’s mountains, but I’m bad at identifying bones. All measurements in centimeters.

More pics:

The vertebra's "top", horizontally. It's 5,5 cm.

Same vertebra on its side.

The vertebra's "bottom".

The vertebra's hole on its other side, we see it's very porous.

I tagged it gross but I don’t now if clean bones are considered gross or not. Let me now if you now :)