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Course Description

This course is seriously fast! From Clarendon, you will head downhill along Wilson Boulevard towards Rosslyn. There, the course flattens out a bit as runners proceed onto Jefferson Davis Highway/ Rte 110.

Both the 5k and 10k courses approach Arlington National Cemetery. 5k runners will turn around at Arlington Memorial Bridge while 10k runners will continue on past the Pentagon and will be treated to views of the Potomac River and the Air Force Memorial before turning around as well.

Consider walking or running back to the start (and stopping at Four Courts on the way!) or parking in Rosslyn or Courthouse (be mindful of parking restrictions).

5k +68 ft / -270 ft   10k +131 ft / -332 ft

Course Elevation Profiles





2012 Clarendon Day 10K



Start and Finish Line Details

The Start Line is located by the intersection of Wilson Boulevard and North Fillmore Street near Whitlow’s on Wilson. There will be a Bag Check area down the block and in front of United Bank where attendants will monitor your items if you leave them using the official race bag provided at Packet Pickup.  At the Start Line of this race, some pre-race water will be available for filling water bottles. There will also be port-a-potties for last minute rest stops.

The Finish Line is located at the intersection of Wilson Boulevard and North Kent Street in Rosslyn. After completing the race, refreshments will be available to participants.
Results will be immediately available thru Athlinks online.  Finisher medals to all 5K and 10K finishers. Eligible competitors who ran the Double– the 5k and 10k– will be given the special Doubles medal for race #2 (two medals total).

On Course Support

Certain things you can’t do without. We have made sure to provide all of the necessities.

Water will be available at the Start and Finish Lines as well as a few points on the course. The first stop, for both the 5k and 10k courses, will be located just past North Lynn Street on Wilson Boulevard (~1.5 miles). Another water stop will be available for 10k participants along Route 110 near the Pentagon North Parking Lot and can be visited before and after the turn around (~3 miles and ~4.5 miles).

A convoy including police officers and a Race Crew member travel by motorbike to lead the race while another Race Crew member trails all competitors on bicycle to monitor for any irregular situations that may arise and require attention.

Medics patrol the course and are stationed at the finish to care for injuries or anything that requires medical attention.

And, we have port-a-potties at the Start and Finish Lines as well as near the 10k turnaround and water stop.

We’re Looking Out For Your Safety

Lisa, our Race Director, makes no bones about it– making sure the race course is completely safe is our top priority. We have thought through all the details including providing cones, barriers, signage, and directionals so that the course is well marked and placing crew and volunteers so there’s help if you need it. We work closely with municipalities to ensure we have police and medical support always on hand. Our high standards ensure you can let loose and enjoy your run.