Found brindle pit (Greasewood/Starr Pass)

Lost or abandoned dog around the Starr Pass/Greasewood area.
She’s female, probably not fixed as it looks like she’s had puppies before, but VERY VERY skittish.
We have tried and tried and tried to approach her to bring her in, but she will absolutely not come near any of us.
Showed up around Wednesday but has not gone far, so we have put food and water out.
Wearing a tan-looking collar, but don’t see a tag.
If you recognize her, please reach out!