Check out www.tropicalfishing.com/carillo.html
Throughout the southern part of Costa rica you are likely to catch sailfish and a very occasional blue marlin. But at carrillo there are fewer sailfish but you have a decent chance at a blue or striped marlin.
The Presidential Challenge and Marlin University were held there every year in March until they moved to Los Suenos to get more sailfish.
Originally Posted by uteppunter
I want to catch a Blue Marlin. I have March 11-14. Where should i go? Costa Rica? Cabo? Who do I call? Help.