I’ve caught some pretty big snook at the River mouth. That was back in the early 90s.
Additionally, keep an eye out for the deadly fer-de-lance, responsible for killing many people in Costa Rica and super well camouflaged, highly aggressive and one of the most feared snakes in SA, commonly k.a. the Costa Rica Landmine or Spanish “barba amarilla (yellow chin). Their Hematoxic venom causes quick tissue damage even when treatment is rendered.I spent 10 days fishing out of Nosara a while back. I didn’t have much luck shore based although the opportunities were there and I would definitely recommmend trying out some shore fishing. Guided offshore was sick, roosters and sails. The BIG roosters we found were a mile off shore on rock outcroppings, the sails weren’t that far out, maybe an hour boat ride. One thing I found was that most guides are unprepared for fly fisherman so I would recommend bringing all of your own fly stuff and not depending on them. I blew my first cast at a sail in the spread and my guide kept trying to hand me a spinning rod. Like pushing it in front of me lol. Redeemed myself on the second attempt . For shore fishing keep an eye out for crocs. Especially around the river mouths.
stayed just down the beach from the Sol y mar in Zancudo. Rick and his wife serve up some good food. enjoyed it there. quiet, remote, beautifull beachI was in that are about 10 years ago. Stayed at a town called Zancudo about 15 km out of Quepos. Had a great time. Did not stay at the Zancudo Lodge but fished with one of their boats and crew. Definately chased sailfish and caught my first sailfish on the fly there.
I had to have my own fly equipment as they did not have any at that time.
They mainly pitch baits but that can be a blast too.
Stayed at a place called Sol y Mar and it was wonderful. It has its own open air bar and restaurant. The rooms are individual cabanas that face the ocean. No air conditioning but the ocean breeze kept the evening’s comfy. Good food and good prices.