I was on the upper Lake. I don't think the lower lake holds stripers. There may be a few stragler stripers in there but you want to be fishing the upper lake if you plan on targeting stripers. To be honest you may want to check Pyramid. I have had far better luck on the stripers at Pyramid but anyways if you try fishing them at Castiac your odds will increase prefferably from a boat if possible but you might have a shot at one of these fish if you shore walk the Dam as I was doing. I access the Dam from what I believe was the East Ramp. If I'm not mistaken the West Ramp is the one where the Life Guard Office is located. If there's no access to the Dam then your at the wrong ramp. Good luck.

JerryG