All Day

CCAN Annual Polar Bear Plunge

National Harbor 802 National Harbor Blvd, Fort Washington

(MD) (Chesapeake Climate Action Network) We're freezing for a reason! CCAN’s Polar Bear Plunge is a day full of laughter and camaraderie as hundreds of climate activists come together in support of our climate campaigns. Through peer-to-peer fundraising, Plungers help raise over 30 percent of the individual donations that power our work in the year ahead. Sign up now to ...

Winter Birdwalk at Riverbend

Riverbend Park 8700 Potomac Hills St, Great Falls

(VA) (Fairfax County Parks) Take a hike through the woods with a naturalist to listen and look for the park’s winter avian residents and migrants. Find out what birds do to survive the winter weather. Feel free to bring your own guides, binoculars and spotting scopes. Site will have a limited number of supplies for participants to borrow for the ...

$8

Winter Birding at Lake Audubon

Walker Nature Center 11450 Glade Drive, Reston

(VA) (Northern Virginia Bird Alliance) Join Northern Virginia Bird Alliance guides Robin and Luke for a winter birding outing at Lake Audubon! Birders of all experience levels are welcome. The planned walking route includes a mix of woodland trail and paved surfaces, with both flat and hilly sections.

Bird Walk at Kingman

Kingman Island

(DC) (DC Bird Alliance) Join DC Bird Alliance for a winter bird walk through Kingman and Heritage Islands!

Black Hill Hike Club

Black Hill Discovery Center 20926 Lake Ridge Drive, Boyds

(MD) (Montgomery Parks) The first rule of Hike Club – have fun! Improve your fitness, make new friends, and experience trails and scenery we don’t often make time to immerse ourselves in. We welcome all ages, though young children must be able to walk at least 3 miles or be carried. Most trails are not stroller accessible and are easy ...

$2

Weed Warrior Workday at Sligo Creek

Sligo Creek Stream Valley Park Silver Spring

(MD) (Montgomery Parks) Join Weed Warrior Supervisors Greg and Kathryn for a non-native, invasive plant removal workday in Sligo Creek Stream Valley Unit 4 (between Forest Glen Road and University Blvd in Silver Spring). We will focus on non-native, invasive vines and shrubs, including porcelainberry (Ampelopsis glandulosa var. brevipedunculata), wintercreeper (Euonymus fortunei), English ivy (Hedera helix), Japanese barberry (Berberisthunbergii), and bush honeysuckle (mainly ...

Volunteer Day at Dumbarton Oaks Park

Dumbarton Oaks Park Lover's Lane and R Street NW, Washington

(DC) (Dumbarton Oaks Park Conservancy) Join the Conservancy for a day of service and stewardship at beautiful Dumbarton Oaks Park.

Invasive Plant Removal at Carter Barron

Carter Barron Amphitheatre 4850 Colorado Ave NW, Washington DC

(DC) (Rock Creek Conservancy)  Join Rock Creek Conservancy for this invasive plant removal restoration event in Rock Creek Park. Invasive plants are a major threat to our fragile forests, and stopping their spread helps allow native plants to thrive in the understory. Event location, directions, and information will be sent from the event leader 48 hours prior to the event.

Invasive Plant Removal at 630 East

Reservation 630 East 2801 Quebec Street Northwest, Washington

(DC) (Rock Creek Conservancy) Join Rock Creek Conservancy and Weed Warrior leader Rena Subotnik or this invasive plant removal restoration event in Rock Creek Park. Invasive plants are a major threat to our fragile forests, and stopping their spread helps allow native plants to thrive in the understory. Event location, directions, and information will be sent from the event leader ...

Lunar New Year Festival

National Museum of Asian Art 1050 Independence Ave. SW, Washington

(DC) (Smithsonian) Gallop into 2026, the year of the horse, and celebrate Lunar New Year with us! This year we're hosting a festival and market pop-up at the nearby Smithsonian Arts + Industries Building (AIB). Experience cultural performances, lion dances, food, makers, and more! Plus, enjoy curator talks and tours at the museum throughout the day.

Winter Stream Ecology Hike

Long Branch Nature Center at Glencarlyn Park 625 S Carlin Springs Rd, Arlington

(VA) (Arlington Parks) Bundle up and join us for a winter nature hike full of frosty discoveries! Ever wonder what fish do when streams freeze over? How life keeps moving under the ice? On this guided walk, we’ll explore stream ecology in winter and uncover how aquatic life—especially fish—adapts to survive the freezing temperatures, slower currents, and reduced food supply. ...

$7

Floral Design Workshop

Hillwood Estate 4155 Linnean Avenue, NW, Washington

(DC) (Hillwood) Inspired by Hillwood’s newest exhibition On Time: Giving Form to the Fleeting, create an arrangement that can stand the test of time—featuring blooms that can be dried such as roses, thistle, and hydrangea—in this onsite floral workshop. All materials are included and subject to availability.

$70 – $80

Frog Frenzy

Potomac Overlook Regional Park 2845 N. Marcey Road, Arlington

(VA) (NOVA Parks) What’s that sound? Wood frogs abound! These woodland amphibians are a welcoming sign that spring is just around the corner. See (and hear) some of these ribbeting animals at Potomac Overlook’s frog pond, and learn about a fascinating adaptation that helps them survive the cold winter. Ages 5 +

$7

Maple Sugar Walk

Brookside Gardens 1800 Glenallan Avenue, Wheaton

(MD) (Montgomery Parks) Hike with a naturalist to the maple tree grove and learn how sugar maple sap is collected and transformed into maple syrup! This is an indoor and outdoor program on natural surface trails. All attendees must register. Inclement weather could cancel this program. Be sure to check Brooksidenature.org for day-of event status.

$7

Your Yard or Balcony Can Be a Pollinator Garden

Audrey Moore Rec Center 8100 Braddock Road, Annandale

(VA) (Fairfax County Parks) You don’t need a large yard to make a big impact for wildlife. Join Laurie Dodd to learn how planting native plants can support pollinators while creating a beautiful, low-maintenance garden—whether you’re working with a backyard, patio, or balcony. This talk introduces easy-to-grow native plants that thrive in a variety of habitats and benefit bees, butterflies, ...