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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.

More Information


  • 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 $10 to launch, $10 to haul out.
    30/50 amp power
  • Gas dock that sells mid-grade unleaded gasoline
  • Pump out system at our gas dock – free for slip holders, $25 for non-slipholders. Sales of fuel, oil, and ice are not eligible for refund or return.
  • Refunds on these types of items are not provided
  • Recycling services for glass, cans, newspapers, etc.
  • Full-Service Restaurant onsite – Island Time Bar and Grill
  • Catering services through the Island Time Bar and Grill for events either on your boat or on our patio.
  • Seasonal outdoor pergola-style deck with full bar, lighting, sound, and 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

Please email [email protected] for inquiry

Slip Rates

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.


Seasonal Slip Rates

2024 seasonal sliprate for columbia island

Annual Slip Rates

2024 annual slip rate for columbia island marina

*Prices are representing a FULL contract season.

Launch Ramp Fee (non-slipholders): $10 in/out

Pump out service (non-slipholders): $25

Columbia Island is a non-liveaboard marina
**Airbnb’s are strictly prohibited and will result in immediate termination of the license agreement and forfeiture of slip fees.

Transient Slips Available

We have 4 transient slips that can accommodate boats from 20 to 50 feet in length. The rate is $3.00 per foot per day with a $25.00 minimum.

Transient Reservation Form

Power For Transient Slips

$10 per day per 30 Amp cord, and $12-$15 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 should 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].


Visiting Washington, DC with your School, Church or Community group, Island Time Bar and Grill is a great place to arrange Lunch or Dinner plans with. With the ability to accommodate 120+ outside and up to 50 inside, large bus friendly parking lot, walking paths and views of the Pentagon and Washington Memorial it’s an escape within the city limits. Contact our Catering Manager at [email protected] to get more information on tour group specials on catering!

Island Time Bar & Grill

Located at Columbia Island Marina on the Pentagon Lagoon. Accessible from the Southbound Side of the George Washington Memorial Parkway between Memorial Bridge and the 14th Street Bridge.


Monday – Friday 12:00 PM – 7:00 PM
Saturday – Sunday 11:00 AM – 7:00 PM

Call (703) 965-8459 and we will gladly make reservations outside these hours.

Restaurant Menu
Catering Menu

Catering Inquiry Form

Columbia Island Catering

We would like to hear from you. Please send us a message by filling out the form below and we will get back with you shortly.

Request Catering Information