Maybe this has been on the marathon’s web site all along, but I just found the following at
http://www.pasadenamarathon.org/forms/FAQrev.pdf:
Q: What time do the various race-day events start?
A: Bike Tour, 6:00 a.m.
Marathon & Half Marathon, 6:30 a.m.
5K & Fun Run/Walk, 6:50 a.m.
I like the fact that our marathoners and half-marathoners will get to start together.