Does anyone know what type this is? It appeared to be growing in a
semi-wild state (ravine in Toronto) but could be an escaped garden
crab apple.

The bright red clusters stood out so strongly against the otherwise
barren limbs of the surrounding growth. Plus I didn't expect to see so
many apples still hanging on at this late date.

Any help would be appreciated.

Thanks,
Greg
USDA Zone 5, Toronto

Please see pic below (find Canadian penny for scale):

http://members.rogers.com/gregmiller2/apple.JPG