Celebrate Earth Day in South Mountain
A roundup of Earth Day 2026 happenings across the region, from volunteer nature clean-ups to festivals and everything in between.
Earth Day is just around the corner, and the South Mountain region of Pennsylvania is bursting with events and opportunities to connect with nature, learn something new, and make a positive impact in your local community. Whether you’re looking to volunteer, shop sustainably, or enjoy a fun day outdoors with the family, there’s something for everyone.
Here’s a roundup of Earth Day happenings across the region:
Mechanicsburg Earth Day Festival
Hosted by: Recreation and Events Committee and the Environmental Advocacy Council of the Borough of Mechanicsburg
📍 Location: Soldiers and Sailors Memorial Park
📅 Date: Saturday, April 18
🕘 Time: 9 AM–3 PM
Enjoy a wide variety of activities and experiences for all ages, including unique artisan vendors, educational programs, live entertainment, food trucks and so much more!
West Shore Wildlife Center “Born To Be Wild” Baby Shower
Hosted by: Gifford Pinchot State Park
📍 Location: Gifford Pinchot State Park, Conewago Day Use area, near the Environmental Learning Center
📅 Date: Saturday, April 18
🕘 Time: 11 AM–3 PM
Join in the Born to Be Wild Baby Shower to help raise awareness about wild babies, and to help raise funds for 2026’s baby season!
New Cumberland Earth & Arts Festival
Hosted by: The New Cumberland Collective
📍 Location: New Cumberland Public Library
📅 Date: Sunday, April 19
🕘 Time: 10 AM – 4 PM
Party for the planet with us! Enjoy free trees, kids’ activities, live music, food trucks, arts and goods vendors, and so much more!
Earth Extravaganza
Hosted by: Adams County Conservation District & Penn State Extension Master Watershed Steward Program
📍 Location: Adams County Agricultural and Natural Resources Center
📅 Date: Thursday, April 23
🕐 Time: 3–7 PM
Enjoy hands-on activities, environmental workshops, live music, and family-friendly fun while connecting with local conservation organizations.
Earth Day at Letort
Hosted by: Central Pennsylvania Conservancy
📍 Location: Letort Park
📅 Date: Saturday, April 25
🕚 Time: 10 AM – 2 PM
Join local environmental community organizations on an educational walk along the Letort Nature Trail to celebrate Earth Day 2026!
Recycle/Reuse Yard Sale 2026
Hosted by: Buttonwood Nature Center
📍 Location: Buttonwood Nature Center
📅 Date: Saturday, April 25
🕘 Time: 9 AM–3 PM
Find treasures and keep reusable items out of the landfill! This community yard sale focuses on sustainable living through reuse.
Earth Day Celebration & Recycle Fundraiser
Hosted by: Buttonwood Nature Center
📍 Location: Buttonwood Nature Center
📅 Date: Saturday, April 25
🕚 Time: 11 AM–4 PM
Join in for a family-friendly celebration featuring eco-activities, nature walks, local vendors, and a recycling fundraiser.
Earth Day Park Site Clean-Up
Hosted by: Kings Gap Environmental Education Center
📍 Location: Pines Day Use Parking Lot 500 Kings Gap Rd., Carlisle, PA 17015
📅 Date: Saturday, April 25
🕘 Time: 9 AM–Noon
Help clean up along the new 0.8-mile Tadpole Trail, which will soon be opened to the public. Volunteers will also help remove debris from the banks of the nearby waterway
And more!
There are Earth Day events happening all month long throughout the South Mountain region. Be sure to check your favorite local organization’s website or social media for even more opportunities to get involved. And for more upcoming events in the region, view our partner Event Calendar.
This Earth Day, let’s come together to care for the natural spaces that make our region so special. Whether you plant a tree, pick up litter, or support a local eco-friendly business, every action helps build a more sustainable future.
See you out there, and Happy Earth Day!