Potomac River Run Marathon 2025

• Flat, scenic trail along historic locks and gatehouses in Carderock, MD.
• Minimal elevation change; 219 feet total gain/loss.
• Boston Qualifier; no specific entry qualifications.
• Typically mild weather; average temp around 61°F (16°C).
• Pace bands available for tailored race strategy.

The Potomac River Run Marathon is a hidden gem for marathon enthusiasts seeking a serene and picturesque running experience. The race features a scenic out-and-back course along the Chesapeake and Ohio Canal Towpath, beginning and ending at the Carderock Recreation Area within the Chesapeake and Ohio Canal National Historical Park. Runners are treated to a flat, dirt trail bordered by the Potomac River on one side and the historic canal on the other, offering a unique blend of natural beauty and tranquility.

A standout feature of this marathon is its quiet, intimate setting, providing a stark contrast to the bustling atmosphere of larger urban marathons. This smaller-scale event attracts runners looking for a low-pressure environment, devoid of the usual crowd congestion. The Potomac River Run Marathon emphasizes simplicity and enjoyment, making it an ideal choice for those who appreciate a focused, no-frills race experience.

Organized by the Safety And Health Foundation, a nonprofit dedicated to promoting health and safety, the race offers participants a well-coordinated event with friendly volunteers and ample support along the course. Despite its relaxed vibe, the marathon is certified by USA Track & Field, serving as a qualifying event for those aiming for the Boston Marathon. Weekend events include a half-marathon, providing runners the flexibility to choose their preferred distance. Amenities such as water stations, food, and medical support ensure runners are well-cared for, adding to the event's appealing, runner-centric atmosphere.

Expect temperatures between 44-64°F (7-18°C) with moderate humidity for the Potomac River Run Marathon in October. Conditions are generally partly cloudy with light south winds.

The Potomac River Run Marathon offers a picturesque journey along the historic C&O Canal Towpath in Washington, DC. This flat and scenic course, primarily composed of crushed gravel, is ideal for runners seeking both beauty and speed. From the start at Fletcher's Cove, participants embark on an out-and-back route, passing charming historic locks like Lock 5, Lock 7, and Lock 10, with spectators cheering from various points along the way. The marathon's minimal elevation change ensures a smooth run, while views of the Potomac River and shaded, tree-lined sections add to the experience. As a qualifier for major marathons like Boston and New York, this race is renowned for its fast times, though runners should be mindful of potential heat and humidity. With its unique blend of history, scenery, and challenge, the Potomac River Run Marathon promises a memorable race day.

Carderock, Maryland, is a hidden gem for those visiting the Potomac River Run Marathon. Nestled in the heart of natural beauty, it provides a perfect backdrop for outdoor enthusiasts and culture seekers alike. While the marathon is a highlight, the surrounding area offers plenty to explore.

The Carderock Recreation Area is a must-visit, featuring picnic spots, sports facilities, and scenic trails. The Billy Goat Trail, with its challenging rock hikes, promises stunning views of the Potomac River. For a more leisurely experience, the C&O Canal towpath offers a serene setting for walking or biking, immersing you in the history of the Chesapeake & Ohio Canal National Historical Park. Nearby, Great Falls Park boasts breathtaking waterfalls and cliffs, perfect for hiking and kayaking.

For a touch of culture, explore the Clara Barton National Historic Site, the former home of the American Red Cross founder. Glen Echo Park, a vibrant arts and cultural center, offers year-round events and classes. If you're staying in nearby Potomac or Cabin John, book accommodations early, especially during peak seasons, to fully enjoy this picturesque area. Whether you're hiking, picnicking, or soaking in local history, Carderock offers a memorable experience beyond the marathon.