Removing invasive plants and cleaning up litter are among the plans for Saturday’s National Public Lands Day at Huntley Meadows Park.

In addition, there are clean-up opportunities along the George Washington Memorial Parkway.

More than 170,000 volunteers are expected at more than 2,100 sites across the country on Sept. 29 to take part in the largest single-day volunteer effort for public lands in the United States.

Elsewhere in the region, Planting native wildflowers and removing litter from the Sycamore Point shoreline and other projects are on the list of volunteer opportunities at Mason Neck. Volunteers are needed to paint fences and help with other projects at the Meadowood Special Recreation Area.

For a full list of opportunities, visit http://www.publiclandsday.org.