Thanks for the help, guys. I thought the bark also looked too light/smooth for a red oak, but couldn't come up with a better theory. My Audubon tree field guide agrees with your concensus. Folks around here tend to mistakenly refer to willow oaks as pin oaks, but I believe this is the "real McCoy". Willow oaks have tiny acorns and those horrendous short, slender leaves that are nearly impossible to rake in the fall. The reason this tree caught my eye is that just to the right of my hand is about 300 yds of open space (2 baseball fields and 1 soccer field) where a small herd of deer crossed in the night. This park is miles inside the city limits and one set of tracks looked like a nice buck, i.e impressive length and pronounced dew claws. From the sign it looked like he was possibly trying to "carve out" an unbred doe from the rest, although I'd think it was getting pretty late for even a secondary rut. City deer probably don't know any better!