Program in History and Philosophy of Science and Technology at Stanford
http://www.stanford.edu/dept/HPST/colloquia.html
Philosophy Department Colloquia at Stanford
https://philosophy.stanford.edu/events/upcoming-events
History and Philosophy of Logic, Mathematics, and Science at Berkeley
http://hplms.berkeley.edu/events.html
Philosophy Department Colloquia at Berkeley
http://philosophy.berkeley.edu/events/upcoming
San Francisco Bay Area Feminism and Philosophy Workshop (BayFAP)
http://online.sfsu.edu/~bayfap/
Southern California History and Philosophy of Logic and Mathematics Group
http://www.faculty.ucr.edu/~reck/HPLM-Group.html
Dominican Colloquia in Berkeley (see attachments below)