The Enigma Run is an annual tribute to the groundbreaking achievements that shaped modern computing, held in the heart of Philadelphia. This year's edition takes place on December 12, 2026, inviting runners and tech enthusiasts alike to explore the rich history and innovative spirit of a city where technology has thrived for decades. The event begins at the site of the University of Pennsylvania’s Moore School of Electrical Engineering, now home to The Franklin Institute. Here, participants will start their journey along the Schuylkill River Trail, tracing paths that have witnessed significant milestones in computer science and engineering. As runners progress through this scenic route, they’ll experience a blend of history and natural beauty, with views of the iconic Philadelphia skyline serving as an inspiring backdrop. This year’s highlight is the introduction of a new loop walk along the Schuylkill River Trail. The trail offers a mix of paved paths and dirt trails that wind alongside the river, providing runners with opportunities to admire lush greenery and observe wildlife in its natural habitat. Each lap around this scenic route covers approximately 5 kilometers, allowing participants to choose their distance based on personal preference or stamina. The Enigma Run is not just about physical endurance; it’s a celebration of intellectual curiosity and technological advancement. Along the trail, runners will encounter interactive stations that highlight key moments in computing history, from ENIAC's groundbreaking contributions to contemporary innovations shaping our digital age. These educational elements enrich the experience for both seasoned tech enthusiasts and newcomers alike. As participants complete their chosen distance, they’ll converge at a central finish area near The Franklin Institute, where post-race festivities await. Refreshments will be available, along with live music and exhibits showcasing advancements in technology that have transformed our world since ENIAC’s inception. Join us on December 12 for an unforgettable run through history and innovation, honoring the legacy of early computing pioneers while embracing the future of technological progress. The Enigma Run promises a unique blend of physical challenge and intellectual stimulation, making it a must-attend event for anyone with a passion for technology or a love for running.
Races Offered
ENIAC Endless Loop Walk
Dec 12, 2026
straighten
Distance —
7 Hours
terrain
Type —
Running
timer
09:00
Weather History
These values represent the 3-year monthly averages for December in Philadelphia.
thermostatTemperature
-0.5° / 6.8°
wb_sunnyFeels like
-5.0° / 3.0°
light_mode
Avg sunshine hours
5h 49m
water_drop
Avg rainfall
3.6 mm
ac_unit
Avg snowfall
0.2 cm
air
Avg wind speed
10.9 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Low (2.0)
humidity_mid
Humidity
70.7%
wb_twilight
Sunrise
08:14
nightlight
Sunset
17:37
About Philadelphia
Learn more about the host city, Philadelphia.
Philadelphia, colloquially referred to as Philly, is the most populous city in the U.S. state of Pennsylvania and the sixth-most populous city in the United States. Its population was 1.60 million at the 2020 census and estimated at 1.57 million in 2025. The Philadelphia metropolitan area, also known as the Delaware Valley, is located in both the Mid-Atlantic and northeastern United States; home to 6.33 million residents, it is the nation's ninth-largest metropolitan area. Philadelphia is known for its culture, cuisine, and history, maintaining contemporary influence in technology and business, sports, and music.