What are the hours and is it open on Saturdays and Sundays?
I went with a guide from Rancho Naturalista Lodge on a Sunday in December 2015, so I guess it was open then! There was a guard at the entrance gate who let us in to photograph birds. If in doubt, contact them: Tel: (506)2558-2000 firstname.lastname@example.org, email@example.com - Or better yet, stay at Rancho Naturalista and go with their great guide!
Get quick answers from Center for Tropical Agricultural Research and Education (CATIE) staff and past visitors.