In Shawagunks (the Gunks), one of the largest and most accessible cliffs on the East Coast. You can buy or rent basic climbing equipment from EMC or Rock and Snow in New Paltz.
Sources and licences
Guide text adapted from the Wikivoyage article "Mid-Hudson and Catskills" by its contributors, available under CC BY-SA 4.0. Read on Wikivoyage · Contributors · CC BY-SA 4.0