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Semper Fi 5k & Half

Washington, District of Columbia, United States

calendar_today 24 Oct, 2026

directions_run Running

sell $12.32 – $76.61

About the Event

The annual Semper Fi 5K & Half returns on October 24th, offering runners a picturesque journey through Washington D.C.'s historic Georgetown neighborhood. Kick off your morning at Fletcher's Boat House, surrounded by lush greenery and the charm of colonial architecture. The race course weaves along the scenic Chesapeake & Ohio Canal path, providing both firm and slightly softer surfaces that challenge and delight participants.
Race day conditions are perfect with mild temperatures ranging from highs around 20°C to lows between 10 and 15°C. Notable landmarks such as Georgetown's iconic buildings offer stunning views throughout your run. Strategically placed aid stations ensure you stay hydrated, maintaining peak performance during the event.
The half marathon route commences near the Potomac Boat Club before concluding at Fletcher’s Boat House, while the 5K starts and ends at its namesake location. Typical winds of around 10 km/h are expected but will not detract from your comfortable race day experience with an average UV index of 4.0, requiring only moderate sun protection.
Race fees vary based on distance: $39.10 for the 5K and $76.61 for the half marathon. Virtual options start at just $20.89, offering additional perks such as a medal or shirt; these can be purchased for an extra cost of $33.75, or kept minimal with only a registration fee of $12.32.
Register online through https://raceroster.com/events/2026/117485/semper-fi-5k-and-half to choose your distance and any additional benefits you desire. Bibs for the event are available for pickup starting October 1st at Fletcher's Boat House; remember to bring a government ID along with your registration confirmation email.
This race promises an enriching experience, blending the beauty of Georgetown’s historic charm with community support and running excellence, making it a must-attend event in the fall calendar.

Races Offered

5K

Oct 24, 2026

straighten

Distance — 5km

terrain

Type — Running

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07:30

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$39.10

Half Marathon

Oct 24, 2026

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Distance — 21km

terrain

Type — Running

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07:30

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$76.61

Virtual with Medal

Oct 24, 2026

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Distance — Virtual with Medal

terrain

Type — Running

timer

07:30

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$20.89

Virtual with Medal and Shirt

Oct 24, 2026

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Distance — Virtual with Medal and Shirt

terrain

Type — Running

timer

07:30

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$33.75

Virtual without Medal/Shirt

Oct 24, 2026

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Distance — Virtual without Medal/Shirt

terrain

Type — Running

timer

07:30

sell

$12.32

Weather History

These values represent the 3-year monthly averages for October in Washington.

thermostat Temperature

10.0° / 20.4°

wb_sunny Feels like

7.6° / 18.4°

light_mode Avg sunshine hours

9h 7m

water_drop Avg rainfall

1.4 mm

ac_unit Avg snowfall

—

air Avg wind speed

9.9 km/h (Light breeze)

opacity Sweat loss rate

Moderate

terrain Course conditions

Firm and slightly soft

sunny Max UV Index

Moderate (4.0)

humidity_mid Humidity

69.3%

wb_twilight Sunrise

07:18

nightlight Sunset

18:28

About Washington

Learn more about the host city, Washington.

Washington, D.C., officially the District of Columbia and commonly known as simply Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River across from Virginia and shares land borders with Maryland to its north and east. It was named after George Washington, a Founding Father and the first president of the United States. The district is named for Columbia, the female personification of the nation, through which human form and attributes are applied to the United States.