Lake Onderdonk

View of lake from the north endWelcome to the official website for Lake Onderdonk in Westerlo, New York.

The purpose of this website is to: (1) provide information about our lake community, (2) offer information about caring for the lake, and (3) keep you apprised of the activities of the Lake Onderdonk Lake Improvement Association. We hope that you'll find this site useful.

We welcome your feedback. Feel free to share your photos and we'll post them on the site. Email us at

Summer sunrise on Lake Onderdonk

Photo courtesy John Merrill.