Why not Black Oak, Quercus velutina? It has spines on the tips of the leaf lobes and the bark seems to match.
http://www.public.iastate.edu/...
http://dendro.cnre.vt.edu/dend...
The link Lin gave for Q. texana, Texas Red Oak is called Nuttall oak elsewhere, the bark doesn't look right.
http://dendro.cnre.vt.edu/dend...
There's also Northern Red Oak, Quercus rubra .. bark doesn't look correct on that either.
http://dendro.cnre.vt.edu/dend...
Are there any acorns on it?
