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
timer
07:30
sell
$39.10
Half Marathon
Oct 24, 2026
straighten
Distance —
21km
terrain
Type —
Running
timer
07:30
sell
$76.61
Virtual with Medal
Oct 24, 2026
straighten
Distance —
Virtual with Medal
terrain
Type —
Running
timer
07:30
sell
$20.89
Virtual with Medal and Shirt
Oct 24, 2026
straighten
Distance —
Virtual with Medal and Shirt
terrain
Type —
Running
timer
07:30
sell
$33.75
Virtual without Medal/Shirt
Oct 24, 2026
straighten
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.
thermostatTemperature
10.0° / 20.4°
wb_sunnyFeels 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.
