Pacific Golden-Plover (Kōlea), Pluvialis fulva
San Diego County, California, US
Uncommon winter visitor to southern CA
Dotterel of some kind?
Common, occurring in any grassed area.
Sorry for the poor photo - it is the best my camera can do, and the closest the birds would allow me to get.
The Pacific Golden Plover (Pluvialis fulva) is a medium-sized plover.