This place is on Avenda Espana which is close to Santa Teresa and Bernal. You just drive down Santa Teresa a bit and make a right onto the street and follow it until you see the Black Mt. Bowmen sign.
This is a combination of field and standard target range. You can see more of the rules from the sign posted below, but basically don't be a dick head and don't use a crossbow are the big too.
The entry point has a decent little staging area with tables and stuff you can do pre and repair on. When you get into those fields you should watch out there are tarantulas. I say that because my friend turned into a bit of a girl once seeing on. They blend in until you are right on them so they can freak you out a bit.
One small oddity it the range is backed up to the Santa Teresa golf course, you may be able to see in this last picture that the range begins where the course ends. I have always had a fantasy of combining the two sports. Shooting from hole to hole would be sort of fun for me at least probably not the other golfers. But they are a bit of a scourge in my neighborhood so the less the better.