Absolutely yes. You will get ticketed if you don't.
I'm not sure why you wouldn't but then again I know a lot of people fish there without one but like I've said before that literally says do not eat the catfish for environmental reasons and and the past 20 years I've noticed that the quality of the lake itself has went down I don't see any fish in there may be one or two little tiny baby fish when there used to be hundreds go to Rancho Jurupa if you want to fish
Thanks! Your answer is awaiting moderation.