Prince William Conservation Alliance
PWCA Calendar
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View our local nature calendar.

Questions? Contact PWCA at 703.490.5200,


Trees on Tap - Wildflower Hotspots
Monday, April 22, 6:30 pm to 8:30 pm

Wildlife Garden Work Days - Merrimac Farm
Saturday, April 27, 9 am to 12 pm
Saturday, May 11, 9 am to 12 pm
Sunday, May 19, 1 pm to 3 pm

Wildlife Garden Work Days - Minnieville Road
Sunday, May 5, 1 pm to 3 pm

2019 NABA Butterfly Count - Manassas Circle
Saturday, July 20, 10 am onwards

Bird Walk at Merrimac Farm WMA
Last Sunday of every month beginning at 8:00am, except for December, when we host the Nokesville Christmas Bird Count.

Trees on Tap - Wildflower Hotspots

Monday, April 22, 6:30 pm to 8:30 pm

Water's End Brewery, 12425 Dillingham Square, Lake Ridge, VA 22192

Join us on March 25 and April 22! Celebrate Earth Day by discovering special places close to home! Catch a glimpse of what the outdoors has to offer in the world of wildflowers with the fabulous Nancy Vehrs , president of the Virginia Native Plant Society.

Spring in Virginia is a magical time of year when nature bursts with life after a winter slumber. Spring wildflowers bring color to our woodlands for a short window of time.

Join us to share your views, meet new friends and have fun. Bring your question, comments, and ideas!

Volunteer! Wildlife Garden at Merrimac Farm

Saturday, April 27, 9 am to 12 pm
Saturday, May 11, 9 am to 12 pm
Saturday, May 19, 1 pm to 3 pm

RSVP appreciated to, 703.490.5200

Where: Meet at Merrimac Farm Stone House, 15014 Deepwood Lane, directions

Mountain MintThanks to volunteer support, we created an area at Merrimac Farm WMA where people and the environment can come together as one. It's a great area to watch wildlife, learn about native plants and pollinators, and get ideas for your own backyard.

We need help to keep nonnative invasive in check to maintain high quality habitat. Even if you can come just once, your help makes a big difference! Wear long pants, sturdy shoes, and long socks.

Read more about Merrimac Farm Wildlife Management Area HERE.

Volunteer! Minnieville Wildlife Buffer

When: Sunday, May 5, 1 to 3 pm

RSVP appreciated to alliance@, 703.490.5200

Where: Meet at K9 Gunner Memorial Dog Park, near the intersection of Minnieville Road and Colby Drive, Woodbridge

Wildlife GardenTogether we're having fun, improving stormwater runoff problems, and transforming a slopefrom an environmental problem into a beautiful area that showcases Virginia's native plants.

We need your help to keep this area free of invasive plants and ensure that the buffer continues to provide all of its services to the environment and community.

We are excited to see what the future holds for this area, and hope that you will come out and join to keep our community beautiful and green.

Butterfly Identification Workshop - Brush Up for Next Weeks Butterfly Count

When: Saturday, July 13, 1 to 3pm

RSVP Required to alliance@, 703.499.4954.

Where: Merrimac Farm WMA, 15014 Deepwood Lane, Nokesville 20181, directions

MonarchBrush up on your butterfly identification skills in this hands on workshop led by Larry Meade.

From egg to adult, butterflies light up our neighborhoods and natural areas. Learn more about the butterflies you are most likely to see in the Prince William area.

Join us the following Saturday to count butterflies in the Merrimac Farm WMA Circle of the Annual Butterfly Count. Free, everyone is welcome.

2019 Annual Butterfly Count - Manassas Circle

Saturday, July 20, beginning at 10 am.

RSVP required to, 703-490-5200. You'll receive the meeting location for your survey team after you RSVP.


Phoebe by Julia FlanaganHelp us count butterflies for the annual 4th of July Butterfly Count and learn more about butterfly populations close to home.

This count is part of a national program led by the North American Butterfly Association (NABA), which compiles information about butterfly populations and distribution that is used to study effects of climate and habitat change on North American butterflies.

Here in Prince William on July 20, we'll form teams and see how many butterflies we can find within our count circle. We submit our compile results to NABA's national database for butterflies. We are also seeking tips on specific areas to survey - please email us if you have ideas.

Bird Walks at Merrimac Farm WMA

When: On the last Sunday of every month at 8am (except December when we sponsor the Nokesville Christmas Bird Count)

Where: Meet at Merrimac Farm, Stone House, 15014 Deepwood Lane, Nokesville

Phoebe by Julia FlanaganWe'll look for birds as we travel through the uplands to the edge of the floodplain, covering a variety of habitats, including open fields and woodland edges. Everyone is welcome.

Dress for the weather, bring binoculars and cameras. More info and RSVP (appreciated) to PWCA , 703.499.4954 or

View the bird list for Merrimac Farm HERE.


The best time to plant a tree was 20 years ago. The second best time is today.
Prince William Conservation Alliance is a nonprofit watershed organization serving Prince William and surrounding communities. We're working to explore, enjoy and protect our natural areas, and increase community involvement in stewardship opportunities.