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

Questions? Contact PWCA at 703.490.5200,


The Rural Crescent: Exploring the Path from Sprawl to Sustainability
Thursday, March 7, from 7 to 9pm

Bluebird Trails Monitoring Training
Saturday, March 16, 10 am to 11:30 am
Sunday, March 17, 10 am to 11:30 am
Saturday, March 23, 10 am to 11:30 am

Trees on Tap - Parks, Trails and Open Space
Monday, March 25, 6:30 pm to 8:30 pm
Monday, April 22, 6:30 pm to 8:30 pm

Wildlife Garden Work Days
Saturday, March 30, 9 am to 12 pm
Sunday, April 7, 1 pm to 3 pm
Saturday, April 13, 9 am to 12 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.

Volunteer! Wildlife Garden at Merrimac Farm

Saturday, March 30, 9 am to 12 pm - we'll be waking up the garden for spring!

Sunday, April 7, 1 pm to 3 pm - we'll be working in the garden!

Saturday, April 13, 9 am to 12 pm - we'll be setting up for the Bluebell Festival!

RSVP greatly 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.

The Rural Crescent: Exploring the Path from Sprawl to Sustainability

Thursday, March 7, from 7 to 9pm

Where: Northern Virginia Community College Manassas Campus, Colgan Theater 6901 Sudley Rd, Manassas, Free Parking! directions

Bring your questions and ideas.

Sponsored by Prince William Conservation Alliance, Northern Virginia Community College and MidCounty Civic Association with Nokesville Civic Association, Coalition to Protect Prince William, Lake Ridge Occoquan Coles Civic Association, and Woodbridge Potomac Communities Civic Association

Healthy communitiesIn 1998 PWC Supervisors adopted a Comprehensive Plan that formally established an urban growth boundary, the Rural Crescent. Their intent was to strengthen the County’s capacity to control urban sprawl.

An urban growth boundary is designed to accomplish many goals, including to safeguard open space and agricultural land from sprawl development. They also seek to encourage smart growth and provide predictable approaches to capital investment and development.

After 20 years, the basic concept of Prince William's urban growth boundary is still in place. By continuing to support the Rural Crescent, county leaders can promote investment in areas that might otherwise be left behind and put the county in the best position for a positive future.

Speakers include:

  • Tom Eitler is the Senior Vice President for the Urban Land Institute and former PWC Chief of Long-range Planning when the Rural Crescent was adopted.
  • Mike May is the managing partner of May Law LLP and served on the Occoquan District on the Board of Supervisors from 2007 to 2016.
Trees on Tap - A Community Conversation

Monday, March 25, 6:30 pm to 8:30 pm
Monday, April 22, 6:30 pm to 8:30 pm

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

RSVP appreciated to, 703-490-5200

Join us on March 25 and April 22! Parks and trails are important! The ongoing update of the Comprehensive Plan will create a vision for parkland, from Woodbridge to Gainesville.

On March 25, Special Guest Brendon Hanafin, from the Prince William County Parks Department, will share information and ideas on natural area land acquisition, trails, and resource management goals.

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

Bluebird Trails Monitoring Training

Saturday, March 16, 10 am to 11:30 am
Sunday, March 17, 10 am to 11:30 am
Saturday, March 23, 10 am to 11:30 am

March 16: Veteran's Park, Directions
March 17: Chinn Park, Directions
March 23: Merrimac Farm, Directions

RSVP required to or (703) 490-5200.


Eastern BluebirdBluebird Trails are open for business this spring! Are you interested in monitoring bluebird nesting boxes? Then come join us for the bluebird monitoring training sessions! The bluebird trail needs volunteers to periodically visit the nesting boxes and record information about the happenings of each nesting box.

You can help, and learn too! Bluebird population resurgence is the product of many people working hard to bring back these birds to our region. Bluebird nesting boxes provide a safe, secure place for bluebirds to remain hidden from predators and discourage competition from other species. You can learn more about bluebird nesting boxes by clicking HERE.

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.