Thanks to Carmel Meza and the Pasadena Museum of History...

we have these group photos as part of the Mexican Collection.

The first may have been taken at the Edna P. Alter/Mexican Settlement.  The back reads " Halloween party, S. Fair Oaks at Hurlbutt, 1914.

The back reads, "Fair Oaks, 1917"

The back reads, "Pasadena Mudhole, Arroyo Seco...(and then lists names of those in the picture as well as date - 1926, August 10".