The Forbidden Run Fest takes place on November 8th in Philadelphia, Pennsylvania, United States, celebrating the beauty of Wissahickon Valley Park, a crown jewel within Philadelphia's park system. The event draws runners to Houston Playground at Grakyn Lane for its challenging and scenic routes through historic trails and natural settings. On race morning, participants will find themselves amidst 2000 acres of lush greenery, with the iconic Forbidden Drive Trail serving as the main artery of this year’s run fest. Wissahickon Valley Park offers a unique blend of nature and history, featuring more than 50 miles of trails that cater to both pavement runners seeking softer terrain and trail enthusiasts looking for varied landscapes. The park's centerpiece, the Forbidden Drive Trail, stretches over five miles with gentle grades and smooth gravel surfaces, making it ideal for endurance running. Since its inception, the Forbidden Run Fest has become an integral part of Philadelphia’s fall racing calendar, attracting nearly 750 runners each year who come to support local parks. This race not only celebrates Wissahickon Valley Park but also contributes to maintaining these precious green spaces through community engagement and awareness. The course for this event winds primarily along the Forbidden Drive Trail with additional sections of natural terrain added for variety, ensuring a unique experience that challenges runners physically while immersing them in nature. Aid stations are strategically placed throughout the route, providing necessary hydration and nutrition points every few miles to keep participants energized until they cross the finish line. Race day temperatures typically hover around mild conditions suitable for outdoor activity without extreme heat or cold; expect firm ground underfoot with minimal soft spots due to recent dry weather patterns. UV levels remain low during November mornings when runners begin their journey, making it a comfortable setting despite early morning chilliness likely present before sunrise.
For those interested in participating, registration can be completed online via [https://ultrasignup.com/register.aspx?did=132873](https://ultrasignup.com/register.aspx?did=132873). Fees vary based on the distance chosen and when participants sign up. Bib pickup for all distances occurs exclusively on race day starting at 8:00 AM sharp at Houston Playground, located near Grakyn Lane in Philadelphia. On November 8th, runners will convene at the designated start location along 900 Grakyn Lane to begin their adventure through Wissahickon Valley Park. The course is designed for ages 16 and older; younger participants must have parental permission or be part of a supervised group event. All registrants should arrive prepared with appropriate footwear, hydration packs if desired, and any other gear needed for the duration expected. The Forbidden Run Fest at Wissahickon Valley Park in Philadelphia on November 8th is an opportunity to experience one of Pennsylvania's premier trail systems while supporting local conservation efforts through participation.
Races Offered
Half Marathon+
Nov 08, 2026
straighten
Distance —
21.1K
terrain
Type —
Running
timer
09:00
sell
$75.00
10 Miler
Nov 08, 2026
straighten
Distance —
16.1K
terrain
Type —
Running
timer
09:15
sell
$65.00
10 KM
Nov 08, 2026
straighten
Distance —
10K
terrain
Type —
Running
timer
09:30
sell
$55.00
Weather History
These values represent the 3-year monthly averages for November in Philadelphia.
thermostatTemperature
4.3° / 13.2°
wb_sunnyFeels like
0.5° / 9.3°
light_mode
Avg sunshine hours
7h 35m
water_drop
Avg rainfall
2.2 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
11.5 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
64.9%
wb_twilight
Sunrise
07:46
nightlight
Sunset
17:44
About Philadelphia
Learn more about the host city, Philadelphia.
Philadelphia, routinely referred to as Philly, is the birthplace of American democracy. In Independence Hall and in taverns and other locations around the city, the nation's founders planned and launched the American Revolution, which gave birth to the nation. Visitors interested in U.S. history will also discover that it is a city of firsts: the first library (1731), first hospital (1751), first medical school (1765), first national capital (1774), first stock exchange (1790), first zoo (1874), and first business school (1881).