Catch weed bellium
I don’t know enough about spineflowers, but I either want to say it is A) a Monterey Spineflower or B) a Diffuse Spineflower. From what I’ve seen, Monterey Spineflowers can either be pink or white.
Even though it’s hard to differentiate this species due to the location and time of year, I’m fairly confident it is lasthenia californica