From just pictures, I think the concensus will be that it is just too difficuly to tell for sure.
That being said - the bark and the color look about right (but there are several different kinds of maple, some are better than others).
You can eliminate some things with a fair degree of certainty:
-In logs / cuts of that size, if it were apple or cherry - you would see darker-colored (brownish / pinkish) heart-wood.
-hiskory is also a light-colored wood, but the bark would typically have more detached edges (at least, on largish logs)
On pictures like this, it is usually good to also put a size-reference object in your picture. A short ruler, or an "every-day" object, that other viewers would recognize, and be able to compare for size reference.
Smell it, to make sure it's not piney or cedar-y. (both of those would be yuck-y
)
I would probably shave-off a bit of the wood, without bark, put it on a little tin foil, and heat it up until it smokes. If the smoke is sweetish in the nose - then you're probably OK. If it's bitter or acrid, then I would use it for firewood instead.
Not a complete answer, but I hope this helps
