Prince William Conservation Alliance
PWCA Calendar
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The Geologic Evolution of Thoroughfare Gap
Sunday, January 22, 1 to 3pm

Hike Dove's Landing Park
Saturday, February 4, 10am to noon

Barbara W. Ellis Talk -- Greener Gardens: One Step at a Time
Sunday, February 12, 2 to 4pm

PWCA Open House
Tuesday, February 28, 5:30 to 7pm

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

Questions? Contact PWCA at 703.490.5200,

The Geologic Evolution of Thorough Gap

When: Sunday, January 22, from 1 to 3pm

Where: Bull Run Conservancy Mountain House, 17405 Beverley Mill Drive, Broad Run, directions

Bull Run MountainSpeaker: Charlie Grymes, Prince William Conservation Alliance

The rocks at the top of Thoroughfare Gap were once an ocean beach. The core of the Blue Ridge was buried as much as five miles underground.

Dinosaurs walked on the reddish rocks that lie underneath Haymarket. The dark rocks exposed at The Plains were hot volcanic lava.

Join us to learn the stories about what's below our feet and above our heads!

Sponsored by Bull Run Mountain Conservancy.

Dove's Landing Hike

When: Sunday, February 4, 10am to noon.

Where: Dove’s Landing parking lot at 9250 Doves Lane, Manassas, VA 20112

Dove's Landing Hike 2009Join PWCA for an easy hike through Prince William County's newest forested parkland.

Dove's Landing is a 235-acre undeveloped property with one mile of frontage along the Occoquan River, upstream from Lake Jackson.

The gently sloping landscape, open forest and scenic appearance are invitating and make Dove's Landing a great choice for a family outing.

For questions and to RSVP (appreciated not required):, 703.499.4954

Barbara W. Ellis Talk -- Greener Gardens: One Step at a Time

When: Sunday, February 12 from 2pm to 4pm

Where: Manassas Park Community Center 99 Adam Street, Manassas Park, VA, directions
Registration recommended. For questions and to RSVP call 703-792-7747 or email master_gardener

Greener GardensSpeaker: Barbara Ellis is the author of Chesapeake Gardening & Landscaping The Essential Green Guide

Creating a greener yard and garden does not have to involve making life-altering changes.

In this talk, Ms. Ellis will discuss a range of options—from simple steps to ambitious projects—that gardeners and homeowners can take to create beautiful, more sustainable gardens and landscapes that are attractive and healthy for humans, wildlife, pets, and the environment as a whole—including the Chesapeake Bay and all its tributaries.

This event is free of charge, and refreshments will be served. Copies of the book will be available for sale and Ms. Ellis will sign copies after her presentation.

Sponsored by the Prince William Wildflower Society, with support from Prince William Conservation Alliance and Prince William Master Gardeners

PWCA Open House

When: Tuesday, February 28, from 5:30 to 7pm

Where: Prince William Conservation Alliance, 2241F Tackett's Mill Drive, Woodbridge, directions

Stormwater pipeSpecial Speaker Marc Aveni, Chief of Prince William's Environmental Services division, will share information about updates to stormwater rules and the Chesapeake Bay.

Please join us for a drink, appetizers, and a lively conversation about stormwater from our backyards to the Chesapeake Bay!

Our Open House is free of charge, everyone is welcome. For more information, contact us at or 703-499-4954.

Bird Walks at Merrimac Farm

When: On the last Sunday of every month at 8am

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

House Finch in the coldWe'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.

Most of our programs are free of change thanks to the generous support from people like you! Click here to read more about us. Click here to donate and support local opportunities!