Found this beast of a largemouth at flat iron lake : r/reddeadredemption2

Flat Iron Lake, Red Dead Wiki

Red Dead Redemption 2 Fish Locations : r/RedDeadOnline

Am I the only one who really enjoys fishing in this game? I'm always on a boat in the middle of flat iron lake lol : r/reddeadredemption

Flat Iron Lake - Red Dead Redemption 2 Guide - IGN

Legendary Animals and Fish Locations and Map - Red Dead Redemption 2 Guide - IGN

Legendary Fish locations in Red Dead Redemption 2

Red Dead Redemption 2 Legendary Fish locations

Flat Iron Lake from above : r/reddeadredemption

Fish - Red Dead Redemption 2 Walkthrough & Guide - GameFAQs