DONV is correct , there is NO access of roads on San Antonio. I've been up that steep sucker once a few years ago on my little sisters deer hunt .We hiked up into it and can say I'll never do it again. There are plenty of deer,antelope and elk up on the mountain though. My friend from here in Santa Fe killed a great bull there in 2003 , but they had horses to get him down , and believe me , you'll want em too if you knock down something up there.
Theres just too many elk in much easier country to hunt in 52 than to mess with the mountain.