8 Events To Celebrate Earth Day In Southern Maryland This Year

PRINCE FREDERICK, Md. — Earth Day was established in 1970 as part of a national movement to show support for environmental protection. Earth Day is celebrated every year on April 22, and encourages people to get involved at the local level.

Over the years, Earth Day has taken many forms; during certain periods, it has served as a day of mass mobilization for political movements that support environmental protection legislation. It also serves as an opportunity for groups to educate people in their communities about local, national and global issues.

Earth Day’s theme for 2026 is “Our Power, Our Planet,” which focuses on mobilizing communities to defend the environment and supporting climate policies. This theme is unique because it focuses on people taking action, rather than relying on big groups or governments.

Southern Maryland has a close relationship with the environment, and an environmentally conscious population. People all over the region are aligned on environmental goals and recognize the importance of protecting the Chesapeake Bay and its waterways.

With all that in mind, there are dozens of ways to celebrate and honor Earth Day this year. If you’re looking for community-focused events, check out some of these to learn about the local environment and meet like-minded neighbors.

Earth Day Events In Calvert County

Earth Day 5K Run/Hike at American Chestnut Land Trust: Run, walk or hike the Parker’s Creek trail loop to celebrate Earth Day on Sunday, April 19. Registration is still open.

Earth Day Celebration at Flag Ponds Nature Park: Celebrate Earth Day with some outdoor nature play. Drop in any time between 10 a.m. and noon on April 22 to discover how you can take better care of our beautiful planet. The program will include a craft, games and several hands-on learning activities appropriate for all ages.

Calvert Lecture Series: Native Gardening for Birds, Bees and Beauty: On April 21 from 7-9 p.m. Maryland Master Naturalist and Master Gardener Molly Moore will offer insider tips for beginners and experienced gardeners alike. Free native seedlings and light refreshments will be provided.

Earth Day Events In St. Mary’s County

Earth Day Celebration at Summerseat Farm: The St. Mary’s County Commission on the Environment (COE) is excited to announce the annual Earth Day Celebration will be held Saturday, April 25, 2026, from 10 a.m. to 2 p.m. at Summerseat Farm in Mechanicsville, MD. The event is rain or shine.

Earth Day on the Bay at St. Clement’s Island Museum: Stop by on April 18 from 10 a.m. to 2 p.m. at the St. Clement’s Island Museum site, where students, community members and local partners are coming together for Earth Day! Guests can ride the water taxi, learn about native plants, do crafts and much more.

Earth Day Events In Charles County

Oxon Cove Earth Day River Cleanup: Join Potomac Riverkeeper Network and our partners as we bring our communities together to celebrate Earth Day by giving back on April 25 from 10 a.m. to 1 p.m. Wear clothes you don’t mind getting a little wet and muddy.

Composting Workshop: In this hands-on workshop, participants will learn composting techniques and how to both prevent and solve common issues. NCEEC staff will explain the proper materials and techniques needed to create quality compost for your garden and landscape. April 18 at 9 a.m. and 10:30 a.m.

Our Sky Tonight Planetarium Show at the James E. Richmond Science Center: See the Earth from a new perspective. The show will take place on April 13 from 6:30 to 7:30 p.m. Adults and children 4+ are $8. Members, CCPS staff, and 3 and under are free.

What are you doing for Earth Day? Let us know in the comments!

---