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City Nature Challenge: Snaps! Apps! Outdoor Fun! BioBlitzing the Pyrite Mine Trail at Prince William Forest Park

Do you like observing nature? Make your observations count! The City Nature Challenge is a friendly worldwide competition using iNaturalist among metro areas to see whose residents can spot and identify the most wildlife. We’ll be looking for signs of life in local parks, neighborhoods, and backyards to see what plants and animals share our environment. Join the City Nature Challenge and become a citizen scientist!

Discover the spring flowers of the Pyrite Mine Trail with the Merrimac Farm Master Naturalists. Orchids, Lilies, Spring Beauties, and other floral delights including interesting fungi awaits our iNaturalist observations. Meet us at Parking lot D on the Scenic Loop. Allow 10 minutes from the entrance to the parking lot.

What is a BioBlitz? A bioblitz is a communal citizen-science effort to record as many species within a designated location and time period as possible.

Learn how to use the iNaturalist app here:

Why Participate? It’s fun—and it’s a great reason to spend some time with nature. You’ll help scientists collect valuable information on urban biodiversity. And you’ll help the Washington DC metro area find as many species as possible!

The event is finished.


May 01 2022


1:00 pm - 4:00 pm


Prince William Forest Park
Parking Lot D Pyrite Mine Trail


Merrimac Farm Master Naturalists

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