Notaro - welcome to S-B..
The ONLY place that I'm familiar with with "Sea Run Trout" is Scorton's Creek in Sandwich - just over the Sagamore bridge on the Cape... I don't chase those so I really have no more to say
Now if you are talkin Weakfish, a/k/a Seatrout, Sqeet, Squeteague, about as far north as I've seen them is into Buzzards Bay but better in Narragansett Bay & Mt Hope Bay.
Which one do you mean?
Now, for Stripers
