When is Ironstone 100K?

Ironstone 100K takes place on Jul 11, 2026. That's in 1 month.

Where is Ironstone 100K located?

Ironstone 100K is held in Hollidaysburg, Pennsylvania, United States.

What distances are available at Ironstone 100K?

Ironstone 100K offers the following distances: 100K.

What is the typical weather for Ironstone 100K?

Based on historical data, you can expect temperatures between 62°F and 84°F on race day. There's approximately a 18% chance of precipitation.

Ironstone 100K (100K) - Jul 11, 2026 | Hollidaysburg, PA

The Ironstone 100K, a true test of grit and resolve, beckons ultrarunners to Hollidaysburg, PA, on July 11, 2026. This savage 100-kilometer point-to-point ultramarathon is renowned as one of Pennsylvania's most challenging races, drawing comparisons to formidable events like the Eastern States 100. With a historical finish rate hovering between 50-61%, participants are advised that this is not an entry-level ultra, requiring prior completion of a 50K trail race to qualify.

The journey begins at 2:00 PM in Canoe Creek State Park, starting with a deceptively well-groomed section before transitioning to approximately 16-17 miles of fast, flat, and often unshaded rail trail along the Frankstown Branch of the Juniata River. The true challenge then unfolds over roughly 40 miles of relentless, rocky, and highly technical ridgeline running atop Tussey Mountain on the Mid State Trail, one of the longest named ridges in the Appalachians. Runners will navigate close to 8,000 feet of elevation gain, encountering features like historic kilns, old-growth pines, and craggy ledges, culminating in a finish at the historic Greenwood Furnace State Park. Typical race day conditions in mid-July include highs around 84°F and lows around 62°F, with an 18% chance of precipitation, often accompanied by muggy conditions and the likelihood of afternoon thunderstorms.

The 2:00 PM start time ensures a significant portion of the race will be run under the cover of night, further amplifying the mental and physical demands on the rocky, fractured trails. Aid stations are strategically placed, offering water, energy drinks, and a variety of sweet and salty foods, though runners should be prepared for substantial distances between stops. This cupless event also uniquely requires participants to complete 8 hours of volunteer work or make a donation, fostering a strong sense of community and stewardship. Finishers are celebrated with a distinctive metal award and the coveted flannel shirt, a testament to conquering this brutal yet beautiful Pennsylvania challenge.