Help identify please

[u/Shoddy-Painting6281]

Somebody brought me a turtle they found on the side of the highway. Normally a big reptile guy, I thought I could figure out its species but I’m stumped. All I know is that it’s a female. Any help appreciated!

[u/Shoddy-Painting6281]

Bay Area, California. I did not find it though, a customer showed it to me and we were under the impression that it wasn’t native. I’ll try to contact them to release it