Semper Fi 5k & Half

About the Event

The Semper Fi 5k & Half returns to Washington, District of Columbia on October 24th. The race offers a scenic half marathon and 5K in the heart of Georgetown near the Nation’s Capital.
Race morning at Fletcher's Boat House finds runners gathering among lush greenery and historic charm. The event venue is set along the Chesapeake & Ohio Canal path, where the air feels crisp as temperatures hover around an average high of 20 degrees Celsius, with a low of 10 to 15 degrees Celsius on race day. This location's rich history adds depth to the running experience.
The Semper Fi 5k & Half has been running for several years now and supports local charities through participant fees, making it an essential community event that brings together runners from all walks of life. The half marathon begins near the Potomac Boat Club in Georgetown before concluding at Fletcher's Boat House, while the 5K starts and finishes at its namesake location.
The course venue is a mix of firm and slightly soft surface along the canal path, providing a challenging yet enjoyable run for participants. Notable features include scenic views and landmarks such as the iconic Georgetown neighborhood. The race includes aid stations to ensure runners stay hydrated and fueled throughout their journey. Despite typical winds around 10 km/h, the weather will feel comfortable with an average UV index of 4.0—moderate protection needed.

5K
5km • Start: 07:30:00 • Fee: $39.10

Half Marathon
21km • Start: 07:30:00 • Fee: $76.61

Virtual with Medal
Start: 07:30:00 • Fee: $20.89

Virtual with Medal and Shirt
Start: 07:30:00 • Fee: $33.75

Virtual without Medal/Shirt
Start: 07:30:00 • Fee: $12.32

5K | Half Marathon
Registration for the Semper Fi 5k & Half can be done online at https://raceroster.com/events/2026/117485/semper-fi-5k-and-half with fees ranging from $39.10 to $76.61 depending on distance and additional perks like medals or shirts.
Bibs are available for pickup starting October 1st at the same location as the race, Fletcher's Boat House in Georgetown. Bring a government ID along with your registration confirmation email. The start location is clearly marked near the water’s edge at Fletcher's Boat House, where participants must be aged 13 or older to join.
This event is worth attending for its picturesque setting and support of local causes.

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.

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.