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Boats docked at Columbia Island Marina

Columbia Island Marina

Welcome To Your New Dock

Columbia Island Marina on the Potomac River has a home for your powerboat. We provide services for boaters seeking year-round slips as well as for those looking for the perfect place to enter the Potomac for fishing or cruising by the monuments.

Conveniently located in the beautiful Lyndon B. Johnson Memorial Grove on the Pentagon Lagoon on the Virginia side of the river, the marina is just one and a half miles north of Ronald Reagan Washington National Airport on the George Washington Memorial Parkway in metropolitan Washington, DC.

Check out our menu:

Island Time Bar and Grill Menu Catering Menu

Columbia Island Marina Boat Storage Waitlist Request Form

Boat Storage Waitlist Request Form


  • 256 annual slips, 20, 24, 30, 40, and 50-foot sizes
  • 126 seasonal slips, 20 foot in size
  • Transient dockage for vessels up to 50 feet in length (Please reserve in advance)
  • Access for slip holders to a private, handicapped-accessible restroom/shower
  • 24-hour boat ramp ($5 fee), Pump Out ($10), Launch ($5 fee)
  • 30/50 amp power
  • Gas dock that sells mid-grade unleaded gasoline
  • Pump out system at our gas dock – free for slip holders, $5 fee for the public
  • Recycling services for glass, cans, newspapers, etc.
  • Great food at the Columbia Island Café
  • Catering services through the Columbia Island Café for events either on your boat or on our patio.
  • Tented seasonal outdoor patio equipped with lights and ceiling fans for casual use or for your planned event
  • National Park Service picnic area
  • Columbia Island Marina is a member of the BoatUS Foundation Life Jacket Loaner Program for Kids! With this program, you can borrow a child-sized life jacket for free.
  • Wifi available
  • Ship store, offering various souvenirs and boating essentials
  • Beer/wine and ice available for purchase
  • 24 Hour video surveillance
  • Boat services including maintenance and hauling provided by Washington Sailing Marina
  • 126 seasonal slips
  • 15 transient slips ranging from 20’ to 50’
  • Please email [email protected] for inquiry

Columbia Island Marina provides 385 wet slips on the Pentagon Lagoon for motor boats ranging from 20-50 feet.

The annual contract term is April 1st to March 31st of the following year. Annual slips are deluxe and range from 20-50 feet. They come equipped with 30/50 amp outlets on personal pedestals, personal water outlets (hoses not provided), and personal dock boxes (locks not provided).

The seasonal contract term is April 1st to October 31st. Seasonal slips are non-deluxe and 20 feet in length. They do not include utilities. There are public water hoses available on the seasonal docks, but no dock boxes.

Payment is collected in full prior to the boating season. Please note that we charge by the overall length of the vessel if the boat extends beyond the length of the slip.
2017 Seasonal Slip Rates

Length Annual Total
*20 $1,743.00
*21 $1,835.15
*22 $1,917.30
23 $2,004.45
24 $2,091.60
25 $2,178.75

2017 Annual Slip Rates

Length Annual Total
20 $3,348.00
24 $4,017.60
30 $5,022.00
35 $5,859.00
40 $6,696.00
50 $8,370.00

NOTE: no Wi-Fi at this time

*This price is for a seasonal slip. Available April 1st to October 31st.
No utilities available (share water and power, no dock boxes).
All annual slips include water and electric.

Transient Slips Available
We have 4 transient slips that can accommodate boats from 20 to 50 feet in length. The rate is $2 per foot per day with a $25.00 minimum.

Transient Reservation Form

Power For Transient Slips
$7 per day per 30 Amp cord, and $12 per day per 50 Amp cord (includes power and water, no dock boxes).

NOTE: no Wi-Fi at this time

*This price is for a seasonal slip. Available April 1st to October 31st.
No utilities available (share water and power, no dock boxes).
All annual slips include water and electric.

Registration / Slip
If you wish to dock at Columbia Island Marina, we are located in/on DC Waters. This means that if your vessel is docked here, it is to be registered in DC regardless of your residence. Please familiarize yourself with the process of registering your vessel.

Documented Vessels
Documented vessels have are to be registered in DC. When your vessel is documented, you do not have to pay the title tax. Vessels that are not documented, have to pay title taxes. Vessels could be documented over 25 ft.

Harbor Legal Requirements
If you are ticketed, the first ticket is a warning, the second one is a citation as well as impoundment fees.

For questions about transients or slip application inquiry, please email [email protected].

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