In middle of gravel McDonald Forest access road
This snake was a few feet away from this one:
https://www.inaturalist.org/observations/218416524
Apologies for the poor quality of the images. We couldn't get closer without disturbing the other.
Might be T. sirtalis?
(I think I see 10 labial scales if I'm doing it correctly)
We were lucky enough to spend 11 minutes with this one (looking at the time-stamps on the run of photos, first to last). Initially it seemed to be frightened and retreated under the little bit of greenery you can see in the 4th frame. After a bit and with the confidence of being protected it slowly came out and investigated us... Extending out and coming in contact with my hand with its tongue and body and then up my hand and arm as I held the phone to try to focus...
This one was a few feet away:
https://www.inaturalist.org/observations/218416526