The lake was originally constructed as a water supply reservoir for the U.S. Army's Camp A.A. Humphreys, now Fort Belvoir.
The park contains the remains of a historic railroad trestle from the Washington-Southern Railway.
The lake's depth has been historically affected by sediment inflow from the Accotink Creek watershed, necessitating periodic dredging.
It serves as a primary hub for the 40-mile long Cross County Trail that spans Fairfax County.
The park provides habitat for the North American river otter, a species rarely seen in suburban Northern Virginia.
Lake Accotink Park is a 493-acre Fairfax County facility centered around a 55-acre lake created by the U.S. Army in 1918 to provide water for Camp A.A. Humphreys. The park features a 3.75-mile trail encircling the lake, which connects to the wider Cross County Trail system. Recreational offerings include a seasonal marina with pedal boat, canoe, kayak, and rowboat rentals. The site supports diverse wildlife, including blue herons, ospreys, and various species of turtles. Visitors can utilize multiple picnic areas equipped with grills and shelters, as well as a fenced dog park. The Accotink Creek feeds the lake, and the park acts as a vital riparian buffer for the local watershed. Significant environmental management projects are periodically conducted to address sediment accumulation in the lake bed.
The wooden footbridge overlooking the spillway near the dam.
Bring binoculars for bird watching near the wetlands area at the northern end of the lake.
Check the county park website for active dredging or maintenance alerts before planning water activities.
Park in the lot near the marina for immediate access to boat rentals and the main picnic areas.
Attempting to swim or wade in the lake, as it is prohibited due to water quality and safety regulations.
Marina rentals are seasonal, typically operating from late spring through early autumn; park grounds remain open year-round.
Leash dogs at all times outside the designated dog park; pack out all trash to maintain the riparian ecosystem.
