Click on calendar items below for details on upcoming events.


Rusty Blackbird Spring Migration Blitz, Mid-March through April

Calling all birders! We intend to schedule several outings at Four Mile Run Park during the spring migration period for Rusty Blackbirds, as part of an international effort to understand the condition of this declining bird species. If you are interested to participate in or lead a group outing, please email More information on identifying Rusties can be found at the International Rusty Blackbird Working Group.

Save the Date: Arlington BioBlitz, May 20

Adults and teens are invited to participate and contribute to Arlington County’s first ever BioBlitz! A BioBlitz is an inventory of the plants and wildlife during a 24-hour period. This citizen science initiative will expand our knowledge of local natural history and help update the County’s Natural Resources Management Plan. Participants will be teamed with various experts to help find, identify, and catalog the various plants and animals that live here. Both experts and novices are invited to help, as this is a great learning experience. More information to be posted, for further information call Alonso Abugattas at 703-228-7742.

'Nauck Woods' Invasive Vine Removal - January 14 and 16

TreeStewards led volunteer invasive plant removal work on Martin Luther King, Jr. weekend near the intersection of Walter Reed Drive and Four Mile Run Drive in Arlington. Adjacent to the 4MRV study area, this 3-acre woods is mostly young trees (under 3-inch trunk diameter), especially Sweetgum.

Christmas Bird Count at Four Mile Run - December 17

Four Mile Run Conservatory Foundation volunteers participated in Audubon's 117th annual Christmas Bird Count on Saturday, December 17 in the Park..

Four Mile Run Valley Visioning Workshop - December 2-6

Arlington County led a series of events to engage citizens in the planning for the Four Mile Run Valley section near Shirlington, upstream of I-395. See the announcement flyer for details.

#GivingTuesday - November 29

Once you've made it all the way through Thanksgiving, Black Friday, Small Business Saturday, and Cyber Monday, please remember to support our Kick the Habit campaign to install water bottle and jug filling stations at the most heavily used fields in the city (with a dollar-for-dollar match!): #GivingTuesday

4MR Conservation Series: Wildlife and Citizen Science at Four Mile Run

Thursday evening, November 17 at 7pm at Jack Taylor's Alexandria Toyota, find out what we've learned about the wildlife of Four Mile Run Park, and how you can be involved in citizen science projects to identify and document the wildlife here.

4MR Conservation Series: Tree Canopy and Planting (two events)

On Thursday, October 27 at 7pm at the Charles Houston Rec Center, learn about how the tree canopy has changed over the last two centuries, based on historic maps and aerial photography of the Four Mile Run watershed, and its importance to environmental and human health.

Then on Saturday, October 29, from 9am-1pm, plant trees to enhance the tree canopy in Four Mile Run Park, with guidance and support from Trees Alexandria and Alexandria/Arlington TreeStewards.

From Arlandria to Chirilagua: the Remaking of a Northern Virginia Neighborhood, 1960s – 1980s

On Wednesday, September 28 at 7:30pm at the Lyceum, Dr. Krystyn Moon, Associate Professor of History and American Studies at the University of Mary Washington, will explore how American immigration and Cold War policies changed the demographics of Northern Virginia in the neighborhood that has acquired the nickname “Chirilagua” after a community in El Salvador. Presented by the Alexandria Historical Society. $5. Details

4MR Conservation Series: Invasive Plant Basket Making

On Saturday, September 24, from 9am-1pm, remove invasive kudzu vine from the Park, and learn how to use this plant material to make a basket with local artist Karen O. Brown. Meet at the parking area next to the Mount Vernon Avenue Bridge. Refreshments will be provided.

Hume Springs Park - National Night Out - August 2

Tuesday evening, August 2 from 6-8pm, meet your neighbors and learn about crime prevention and safety at the neighborhood block party at Hume Springs Park! This event features live music from local band Mars Rodeo, a bounce house, games, food, ice cream, and more.

Invasive Vine Removal - June 25

On Saturday, June 25 at 8:30am, we will tackle some invasive vines and shrubs at the Mount Vernon Avenue parking area at Four Mile Run Park. A few volunteers are needed, and gloves and tools will be provided. We plan to finish by 11am.

4MR Ribbon Cutting - May 14

On Saturday, May 14 at 8:30am, please join us at the ribbon cutting for the Alexandria portion of the Four Mile Run Project. Gather at the parking lot by Four Mile Run (4109 Mount Vernon Avenue) to celebrate and see the recently completed wetland restoration and park improvements.