RE: I'd say this is a mature deer
You guys are right about the size of the Midwest deer tracks. I had the privelage of hunting in Kansas for 8 years and the deer and their tracks are much bigger than the Texas deer. For Texas however, that is a very nice deer and could be a doe or a buck. The weight of the deer is what causes the dew claws to leave a mark. Looking at the track it could be either because the toes are split. Good Luck either way.
Doe or Buck the backstrap is still going to be tastey..