Prepare for a true test of grit and endurance at the Sproul 10k, happening on June 20, 2026, in the rugged terrain of North Bend, PA. Organized by the acclaimed PA Trail Dogs, this event has earned its reputation as "Pennsylvania's toughest 10k" for good reason, marking its 19th annual running as a cornerstone of the Rocksylvania Trail Series. The challenging course, approximately 6.7 miles, plunges runners deep into the Sproul State Forest, immersing them in breathtaking vistas, invigorating stream crossings, and technical singletrack trails. Typical race day conditions in late June bring highs around 80F and lows around 57F, with about a 17% chance of precipitation, adding to the authentic trail experience.

The Sproul 10k's demanding profile begins with a relentless, approximately three-mile ascent, climbing nearly 1,500 feet to the summit of McCloskey Mountain. This grueling climb is followed by a "blistering" 3.5 to 3.7-mile downhill charge back to the finish line, pushing both quads and hamstrings to their limits. With 95% un-paved trails, the course demands focus, though it is well-marked and marshaled. Runners can expect one aid station at the top of the mountain to refuel before the exhilarating descent. The race starts and finishes at the Western Clinton Sportsman's Association clubhouse, a hub for pre-race bib pickup and ample parking.

Beyond the physical challenge, the Sproul 10k is celebrated for its vibrant community atmosphere, often described as a "family reunion with family you actually like". Participants receive a technical shirt and a well-deserved post-race meal, adding to the camaraderie. This popular event strictly limits registration to 300-400 runners with no race-day sign-ups, refunds, or deferrals, so securing your spot early is essential to experience this uniquely demanding and rewarding Pennsylvania trail race.