I'm here in San Angelo.

Not much to find here in the local area. Going out to lake Nasworthy and cruising up and down random dirt roads will get you bulls and atrox almost any night of the week.
There is a spillway by the ASU lake house that has a swampy microhabit that provides lots of water snakes and i've found a few cotton mouths there as well.
The drive between San Angelo and Midland has provided me with an unlimited amount of coachwhips to chase down over the years.
Most of the "cool" things in the area you just have to stumble upon by chance... it's so hot and there is so much private land that herping the concho valley is mostly luck and not skill.
You could go out to the nature center and talk with Mike Price, i'm sure he can point you in the right direction... the guy really really knows his stuff.
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1.1 Argentine Boas
1.1 Dumerils Boas
1.1 Black Milk Snakes
2.3 California King Snakes
1.1 Nelsons Milk Snakes
2.2 Corn Snakes