I know we have a club race - Saddleback Memorial Half Marathon and 5k
on May 29, but the Mt Wilson race is one of the oldest races in CA.
First held in 1908. It's an 8.6 mile out(up) and back with 2100 feet
of gain over 4.3 miles.
http://www.cityofsierramadre.com/docs_forms/files/mwtr_entry_form.pdf
Since they don't advertise in Race Place or Active.com it's a mostly
local affair run by the City of Sierra Madre. Let me know if you're
thinking of running it.
Jon Resnick