Caesar Rodney Half Marathon & 5K

Sunday, March 22, 2020 • Wilmington, DE • Course Map

Set for its 57th annual running through the streets of Delaware’s largest city, the Caesar Rodney Half Marathon & 5K takes runners on an out-and-back tour of the city, with much of the course unfolding along the banks of the Christina River and Brandywine Creek.

More than 1,400 runners and walkers crossed the finish line each year at this event, which also serves as a fundraiser for the Delaware chapter of the American Lung Association, whose programs promote clean air, the prevention of lung disease and fight the environmental conditions and pollutants that cause lung disease in the Delaware, New Jersey, Pennsylvania and West Virginia areas.

The race is often described as “the granddaddy of Delaware road races” thanks to its long history here, and often draws runners from as many as 20 countries around the world each year — and at more than half a century old, it’s been called the oldest continuously running half marathon in the nation.

Runners start and finish the out-and-back course for the race in downtown Wilmington near Rodney Square, and from there head out for stretches along Brandywine Creek and the river, including stretches that run past the Russell Peterson Wildlife Refuge, Brandywine Park and Rockford Park.

The race finishes just a few blocks from where it started, at Rodney Square on the corner of 10th and Market Streets. Those running in the half marathon must be able to complete the race within 3.5 hours, while those running the 5K must be able to finish their race within one hour.

Organizers note also that unless there’s a state of emergency or other warning issued by the National Weather Service that indicates conditions are too hazardous to run the race, “we run in all weather.”

Rodney Square in Wilmington, Del. (Photo by Chris Connelly/flickr)

Rodney Square in Wilmington, Del. (Photo by Chris Connelly/flickr)

Race Weather & Climate

Nestled along the winding Christina River in the northern corner of the state, Wilmington typically sees March temperatures that average between 33°F and 51°F, while precipitation amounts average just over 3.8 inches for the month.

On race day (March 22), the average low is 36°F and the average high is 55°F.

Past Results

Course Map

See the race route map for the Caesar Rodney Half Marathon here.

Starting Time

  • 9:30 AM – half marathon, 5K


  • $65 – $95 for the half marathon
  • $20 – $35 for the 5K


To reserve your spot in the early spring 2020 running of Wilmington’s Caesar Rodney Half Marathon or 5K race, register online at here.

Official Race Website


Ever run in the Caesar Rodney Half Marathon? Share your impressions here, or post your review in the Comments box below.

See more races in: March, Delaware

2 comments… add one
  • Todd Laverty February 16, 2018, 8:09 pm

    I am just double checking to make sure that I am registered for the run
    My name is Todd Laverty
    Please let me know.
    Thank you.

  • Paola Patrissi February 17, 2015, 3:38 pm

    First half marathon.


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