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Citizen Science Saturday: Tree Challenge

April 11 @ 1:00 pm - 3:00 pm

This event has been postponed indefinitely due to the COVID-19 emergency


April is officially Citizen Science Month! Adults and teens, come to Great Hollow for an afternoon of hiking, data collection, and learning as we put on our scientist hats. In this installment of our new “citizen science” series, we will be taking part in GLOBE’s (The Global Learning and Observation to Benefit the Environment) worldwide April Tree Challenge. We will hike throughout Great Hollow to identify and measure the height of as many trees as we can. You’ll learn the methods used by professional foresters and ecologists to characterize and inventory forests. The data we collect will then be sent to scientists researching climate change and carbon sequestration potential. We will be using an app to collect and submit the data to GLOBE, so please bring your smartphone if you have one.

Suitable for ages 13 and up. Free for members; a suggested donation of $5 per person for non-members is appreciated. Please sign up by emailing Maggie at .


April 11
1:00 pm - 3:00 pm


Great Hollow Nature Preserve
225 CT-37
New Fairfield, CT 06812 United States


Great Hollow Nature Preserve & Ecological Research Center
(203) 546-7789