Waskeyc.

I live In Oregon just a few miles from California. This summer I spent a lot of time fishing in Northern Cal which is a long way from your pretty creek. While searching Northern Cal I found that contact with the California Department of Fish and Game to be helpful in identifying what species of fish were in the waters I was searching. Perhaps you could contact them for info. California Department of Fish and Game. 866-440-9530. WWW.dfg.ca.gov.
I would guess a brown trout. Good luck. Tim