Safety of birding locations?

Thanks to those who have suggested birding locations for me (I will be visiting San Diego next month). Since I will be alone, in an unfamiliar city, are any of these locations (see picture below) particularly dangerous, or would you feel comfortable birding there alone? My main concerns are the Tijuana area – and I like to get away from people, so I am usually off the beaten path.

Thanks for any input,

Jessica