Sunday, March 1st - 1:00 - 2:30 pm All Ages Wood Frogs and Spring Peepers have some amazing adaptations to allow them to survive Maryland’s late winter and early spring. Help unscramble the mystery behind their different egg masses in the park ponds and learn about these cool amphibians while seeing who is thawing out.
March 6th, 7:00 pm - 8:30 pm. Ages 8+. Indigenous people took note of when worm castings appeared each year as the ground thawed. Join a Naturalist to look for these interesting piles of worm poop and discover other early signs of spring. $6/person. REGISTRATION REQUIRED
March 7th - 1:00 pm - 2:30 pm Ages 10+. For thousands of years, nature has provided resins and fibers that are flammable. Hike with a Naturalist to find these materials and learn how to use them. $3/person. REGISTRATION REQUIRED For questions or assistance in registering for an event, select the help button on the
February 21 2 pm – 4 pm March 7 2 pm – 4 pm March 21 2 pm – 4 pm April 4 2 pm – 4 pm April 25
Sun, March 8, 1 pm - 2:30 pm - Ages 4+. How do bears sleep, chipmunks rest, and woodchucks snooze their way through 3 months without eating and still survive? Join a Ranger as we seek out wildlife, and their dens and burrows, on a short hike. Wear sturdy shoes and dress for the weather. $3/person.
When two wonder-powers get together to make the park's special places even more special, you don't want to miss being part of that change! Please join us on Friday, March 13th at 1:00 pm at the Sherwood House to help prepare the Honor Garden and the Sherwood Herb Garden for the spring. Activities include cutting back dead
Sat, March 14, 10 am - 12 pm Ages 18+. Want to become a citizen scientist? Interested in helping out our Eastern Bluebird population at the park? Learn how to identify common species of cavity nesting birds, how to safely observe and monitor adults and their young, and how to accurately report your observations. This
Sun, March 15 - 11 am - 12:00 pm All Ages. Learn about nature’s good luck charms from cultures all around the world! Go on a hunt for shamrocks and paint a lucky horseshoe to take home. $3/person. REGISTRATION REQUIRED For questions or assistance in registering for an event, select the help button on the
Wednesdays, March 18 to May 20 - 9:30 am - 10:30 am Ages 55+. Walking in nature provides benefits to both the mind and body. Enjoy a relaxing stroll with one of our Naturalist along some of Cromwell Valley’s less strenuous trails. FREE! Dates: 3/18, 3/25, 4/1, 4/8, 4/15, 4/22, 4/29, 5/6, 5/13, 5/20. REGISTRATION REQUIRED
Come join us to learn about the Phoenix Wildlife Center; its mission, its research projects, and how wildlife rehabilitation supports populations in decline. Questions are welcome!!! Now in its 26th year, this 100% community supported organization is here for YOU and the animals we save. Speaker: Kathy Woods will share her experiences with all participants.
Sat, March 21 - 11 am - 12 pm All Ages. Greet our resident egg layers and meet our new baby chicks! Learn what it’s like to grow up in an egg and how long it takes to hatch. Then help throw some lunch to our feathered bunch. FREE! REGISTRATION REQUIRED. For questions or assistance
Sun, March 22 - 1 pm - 2:30 pm Ages 16+. Some early blooms have been used for medicines, some for tonics, and even some for brewing ale. Join a Ranger to seek out the microclimates and adaptations which allow these plants to flower so early. Wear sturdy shoes and dress for the weather. $6/person.
Wednesdays, March 18 to May 20 - 9:30 am - 10:30 am Ages 55+. Walking in nature provides benefits to both the mind and body. Enjoy a relaxing stroll with one of our Naturalist along some of Cromwell Valley’s less strenuous trails. FREE! Dates: 3/18, 3/25, 4/1, 4/8, 4/15, 4/22, 4/29, 5/6, 5/13, 5/20. REGISTRATION REQUIRED
Ages 13+, with an Adult. Join us for a morning in the garden. We provide direction, gloves, tools, and water. You bring a hat, sunscreen and a little energy. Drop-in program. FREE!
Sat, March 28 1 pm - 3 pm Ages 6+. Many plants have evolved toxic chemicals or other defenses to protect themselves from predation. Learn the safe way to harvest one of these plants – stinging nettle – and then bring it back to the nature center to try on top of pizza. (Don’t worry
Ages 18+. The Indigenous people of Maryland made fish weirs, spears, fishing line and hooks. Learn how to twist hand line and make gorge hooks from Hawthorne thorns. $6/person. REGISTRATION REQUIRED
Ages 8+. Join a Naturalist for a frog-filled spring night hike. Wear shoes and/or boots that can get wet. $6/person. REGISTRATION REQUIRED
All Ages. Pick up a self-guided activity booklet at the nature center and then hop outside to find your clues which will lead you on a short hike. When you get to the end, come back to retrieve an egg-cellent prize! FREE! REGISTRATION REQUIRED
Mondays April 6- Oct. 26 8:30am-10:30am & Thursdays April 9 - Oct. 29 8:30am-10:30am Ages 18+. Do you enjoy gardening, but don’t have the space or a deer-proof fence? Join like-minded green thumbs (and beginner brown thumbs) to grow your own vegetables, herbs and flowers and tend to our shared garden plots. We’ll provide the
Sat, April 11 10-11am Ages 2 to 6, with an Adult. Meet one of our critters at the Cromwell Valley Park and make a critter craft to take home with you. $3/child. REGISTRATION REQUIRED FOR CHILD ONLY
Sun, April 12 1pm-2:30pm Ages 5+. Grab your work gloves and join us as we pull this invasive weed. Then follow us back to the kitchen to learn how to turn this pest into a delicious garlic mustard pesto! $6/person. REGISTRATION REQUIRED
Tues., April 14 to May 19 10:30am-11:30am Ages 2 to 5, with an Adult. Discovering nature is a lifelong journey. In this class, you and your little one will explore the natural world through hands-on activities, nature play, stories and crafts. Non-mobile siblings only, parent/guardian must be an active participant. This program will be held
Sat., April 18 1pm-3pm Ages 18+. Beads made from animal bone have been found in many neolithic graves. We will use stone tools to cut and shape bone for a wrist band or necklace. Instruction in cordage manufacture included. $6/person. REGISTRATION REQUIRED
Sun, April 19 10:30am-12pm Ages 5+. Turn yesterday’s recycling into today’s music! Bring your clean, empty cans and join a Naturalist to design and decorate your own eco-friendly wind chime for Earth Day. $3/person. REGISTRATION REQUIRED
Sat, April 25 9am-3pm All Ages. Clearing out some Black-eyed Susan’s? Want to plant some Butterfly weed? Bring in your potted native plants and take home something new! Please label your plants to include basic information (name of plant, sun, shade, wet, dry…) so they can thrive in the new home. Please drop off plants
Sun, April 26 1pm-3pm Ages 8+. The sunlight is getting longer with each spring day. Take a guided hike with a Naturalist to gather leaves, petals, and other treasures from the landscape. Then use your finds to craft a gorgeous suncatcher that will bring the beauty of the season into your home! $6/person. REGISTRATION REQUIRED.
May 15, 2026 - 6 pm - 8 pm - in the Sherwood House $10 p/person drinks and desserts provided - Ages 18+ Jen will discuss the history of humans and fire in the eastern United States and the importance of fire in maintaining healthy ecosystem function and to complete plant life cycles. She will
September 18, 2026 – Dr. Wayne Bell "The Chesapeake Working Landscape: Past, Present, and a Hopeful Future" A history of land use on the Chesapeake Bay watershed, from pre-colonial times to the present, and insights that land use changes provide for bird conservation. Background - Dr. Bell is Senior Associate and former Director of the
October 16, 2026 – Carrie Engel – Native Plants For Fall – Why is fall a great time to plant natives? Which natives have fall color and/or flowers? Which native plants are migrating pollinators attracted to? Let’s dive into fall natives and learn about these and other subjects. Samples and a slide show will be
Bats: Kerry Wixted presenting the benefits of having bats in your yard November 20, 2026 6:00 - 8:00 pm in the Sherwood House $10 p/person drinks and desserts provided - Ages 18+
Cromwell Valley Park Office
(Sherwood House)
2002 Cromwell Bridge Rd
Parkville, MD 21234
GPS: 39.415, -76.552
Phone: 410-887-2503
TDD: 410-887-5319
Willow Grove Nature Education Center
2175 Cromwell Bridge Rd
Parkville, MD 21234
GPS: 39.417, -76.548
Please remember that the Park itself is open only during daylight hours, sunrise to sunset.
In case of inclement weather, the Nature Center and activities follow Baltimore County Pubic Schools. Check the BCPS Website for the latest information on closing. If closing early, all evening activities at the Park are cancelled.
On Saturdays and Sundays when the office is closed, you may call the Nature Education Center.
Note: The addresses (2002 and 2175) are really for Post Office use. If used on a GPS, they may take you to a strange place in the park, or leave you on the main road. Use the GPS coordinates instead.
The Cromwell Valley Park Council (CVPC) is a volunteer, non-profit organization dedicated to the stewardship of Cromwell Valley Park as a public space for passive recreation and School Programs. The CVPC works in cooperation with the Baltimore County Department of Recreation and Parks and other entities to maintain, preserve and protect the natural environment and historic structures in the Park.
The Cromwell Valley Park Council is not an official site for Baltimore County Government.