Legal Question in Family Law in California

Your daughter's best interests come before what you want, in any Court. You may be able to, in the short term, pick her up and take her, but that doesn't mean you won't be drawn into Court or be forced to return her if there is a fight for custody. I can't say for sure what your rights regarding picking her up in Nevada would be without a further conversation than we can have on this forum. I don't know if you two were married, why she was not in your custody, etc.

Dad may not be on the birth certificate, but he can easily establish paternity. How long has your daughter been in Nevada? If she is being bounced around from household to household because you and your ex can't get your acts together, Courts will choose whatever will provide her with the most stability. Her friends and everything she is comfortable with is where she is now, so you need to think of what is going to be the least traumatic for HER. She is a teenager and the friends she has developed are extremely important to her. You are not saying that the daughter wants to go with you, only what you want. That may not be what is in her best interests.