The Inaugural 21.5K
Date
Sun, May 31, 2026, 8:00 AM EDTDistance
Half Marathon
Quick take
Explore Philly's culture on foot in this inaugural 13.3-mile event, celebrating the city and America's 250th anniversary.
Race feel
- Quirky
- Festive
Quirky
FestiveThe Inaugural 21.5K offers a unique half marathon(+) experience through Philadelphia, designed to complement the Broad Street Run. Taking place on the final Sunday of May, it provides an opportunity for runners to tackle a longer distance before summer heat arrives. The course begins and ends in North Philly, weaving through diverse neighborhoods, landmarks, and communities. This limited-entry event celebrates the rich culture and history of Philly, alongside America's 250th anniversary, with a special focus on the number 215.
What to expect
- A unique 13.3-mile distance, slightly longer than a traditional half marathon.
- An open streets course connecting Philadelphia neighborhoods and landmarks.
- Pace groups to support community running, with an emphasis on personal safety and traffic awareness.
Standout details
- Inaugural 21.5K event
- Unique 13.3-mile distance
- Limited to 215 runners
- Celebrates Philly & America's 250th
Ready to register?
Finish signup on the organizer site (check fees and dates there).
From the organizer
Set to take place on May 31, 2026 at 8am, the inaugural 21. 5K is a half marathon(+) (13. 3 miles) event that celebrates the culture and history of Philly. Meant to complement the Broad Street Run, held on the first Sunday of May each year, the 21.
Read full descriptionHide full description
5K takes place on the final Sunday of May, offering participants a final opportunity to take on a longer distance through the city before the summer heat sets in. The race begins and finishes in North Philly, creating a route that connects neighborhoods, landmarks, and communities across Philly before returning to where it all started. Participation is limited to 215 runners and (at least) 35 volunteers, for a goal of 250 total participants — celebrating both Philly (215) and America’s 250th anniversary. Please note: The INAGURAL 21. 5K will take place on an open streets course. Pace groups will help keep the community together, but participants are expected to follow all traffic laws and signals at all times, remain aware of their surroundings, and run safely and responsibly throughout the community.