To promote the health and beauty of the Cabin John Creek Watershed, FoCJC has pursued a variety of activities, including annual trash removal days, a Weed Warriors program to remove invasive exotic weeds; water quality monitoring, and commenting on Montgomery County Department of Environmental Protection (DEP) Cabin John Creek Watershed Restoration Study.

New activities are under development, so subscribe to our free newsletter or check back here to stay up to date!

Upcoming Events

Wednesday September 22,  7 - 9:30 pm

Sunday, September 26, 1:30 - 4 pm

The Audubon Naturalist Society (ANS), a pioneer in linking conservation activities with environmental education, is offering two stream science classes in the coming weeks:

How to Read Your Stream
Wednesday September 22,  7 - 9:30 pm
Online Session
Learn about the influence of land uses on streams, stream character and dynamics, bank erosion, bar formation, substrate composition, different velocity-depth regimes, and the importance of riffles and riparian vegetation. We will practice assessing stream habitat by using photographs of streams and the forms that monitors fill out in the field.
Members  $15, Non-members  $25
Stream Science Field Workshop
Sunday, September 26, 1:30 - 4 pm
Ten Mile Creek, Boyds, MD
We will visit a healthy stream at Ten Mile Creek in Boyds, MD, to practice monitoring techniques and to collect and identify the benthic macroinvertebrates we find.
Members  $15, Non-members  $25

For more information about these and other ANS courses, such as Landscapes for Life: Conservation Gardening, Composting Workshop, and Conservation & Environmental Advocacy 101, and to register for any of these courses, please visit:
(You will need to search by name for the course you're interested within the ANS online catalog.)
Questions?  Pam Oves, 301-652-9188 x16,


Saturday, September 25, 9 am - 12 noon
Carderock Recreation Area
Potomac, MD

The National Capital PRISM (Partnerships for Regional Invasive Species Management) and the Chesapeake and Ohio Canal National Historical Park invite you to join them on Saturday, September 25th, 2021 at Carderock Recreation Area to learn how to identify and remove non-native plants threatening our urban forests. This event is part of Weed Wrangle®, a one-day, area-wide, volunteer effort to help rescue our public parks and green spaces from non-native invasive species through hands-on removal of especially harmful trees, vines, and flowering plants. This event will be led by a local vegetation expert and will focus on removal of non-native vines and shrubs.
Tools and gloves will be provided by the NCA Invasive Plant Management Team, but volunteers are encouraged to bring their own tools and safety gear. 
Please register here: National Park Service Invasive Plant Removal at Carderock

Additional information about the event will be shared with all participants on Monday, September 20. 

Questions?  Contact Alex Voznitza at


Sunday, September 26, 10 am - 12 noon
Cabin John Regional Park
7400 Tuckerman Ln., Bethesda, MD  20817

Save the trees! Join Chuck Woolery and Steven Romanoff, Weed Warrior Supervisors, for a Sunday morning non-native, invasive plant removal workday in the northern section of Cabin John Regional Park in Potomac, MD.  We will be focusing on non-native, invasive vines, including porcelainberry (Ampelopsis glandulosa var. brevipedunculata), wintercreeper (Euonymus fortunei), and English ivy (Hedera helix).

Please wear long pants that cover your ankles, long sleeves, and sturdy, closed-toed shoes.  Bring gloves, pruners, small folding hand saws and/or loppers if you have them.  Gloves and tools are available to borrow if you don’t have your own.  No power tools or machetes allowed. Please bring water to drink.  

This event is capped at 30 people and is for people 18 years or older.

All volunteers must register online and complete a COVID-19 Volunteer Waiver.  You will complete your waiver when you create a profile in the Montgomery Parks Volunteer Database, during the online registration. Please email Corinne (WW Volunteer Coordinator) if you need a copy of the current Weed Warrior Workday COVID protocols.

Click here to register for the event, then click “Schedule” to sign up for this event/shift.  More details, including the exact meeting location, will be emailed to you after you register. If you already have an account in the database, email Corinne (WW Volunteer Coordinator), and don’t create a new account!

For questions, email Chuck.

To learn more about the Weed Warrior program, go to


Through Thursday, September 30


Montgomery Parks, part of The Maryland-National Capital Park and Planning Commission, provides parks, trails, sports venues, gardens, historic sites and events centers for the residents of Montgomery County, MD, and visitors around the world.  The department is updating its Parks, Recreation and Open Space (PROS) Master Plan.  This document will guide the future development and management of the park system.  They are asking residents to take a brief survey about how their lives are, or could be.
The online survey is available at and open through September 30.