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CANCELLED: City Nature Challenge: Moss Walk with Sadie Francis

April 26 @ 12:00 pm - 3:00 pm

This event has been cancelled due to Covid-19 risks. For more information, visit

Meet at Emlen Street Trailhead (at the staircase off Cresheim Valley Road/Emlen Street near the intersection with Allens Lane)

For the second consecutive year, Philadelphia is participating in the City Nature Challenge, competing against cities worldwide to observe the greatest number of flora and fauna species. Download the iNaturalist app on your smart device to capture data on these walks. Learn more at

Explore the delicate hidden world of mosses on rocks, tree stumps, and along the streams of the Wissahickon, an amazing world normally overlooked by trail users. Learn about the diversity, biology, and habitat of mosses by observing them in their micro-environments on rotting wood, stony outcrops, and protected edges. Participants are encouraged to bring their own hand lenses or magnifying glasses, but we will have 10 hand lenses available for sharing. No dogs, please.

Ages: 12+ with adult.
Level: Moderate/adapted to group (uneven trails)
Distance: 2 Miles

Registration is recommended for all hikes (required if indicated) so that participants can be informed of weather or other emergency cancellations. Unless otherwise specified, Trail Ambassador Walks may be on rocky, rugged trails that may be wet and slippery. Wear sturdy shoes or boots with socks. Long pants are recommended for protection against occasional poison ivy and possible ticks. Bring water and a snack if desired. Unless otherwise noted, children over six are welcome if accompanied by a responsible adult. Walks are cancelled in heavy rain or icy conditions. For more information contact Maeve Pollack at Visit for updates.

Register Here!


April 26
12:00 pm - 3:00 pm
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Emlen Street Trailhead
7302 Emlen Street
Philadelphia, PA 19119 United States
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