Shad still Runnin' ?

I caught some 6-8 inch shad off Chrissy field last year around this time, I now reside in the greater Sacramento area & was wondering if the larger shad are still running in Sac/American river systems around this time. I know they were running last month, just not sure if it's worth the trip out this late in the season. Smoked white shad are delicious!