Black Forest 100k

Black Forest 100k is a trail ultra in Chapman Township, Pennsylvania, held on October 4, 2026. The event is a single 100K (62 miles) with an unusual noon start, which means most of the field will run through the evening and well into the night.

That midday start changes the whole shape of your race. You will run the first hours in daylight with fresh legs, then face the hardest, slowest miles in the dark, so headlamp practice, warm layers and a plan for staying alert overnight are as important as the mileage in your training. Pennsylvania trails are known for rocks and roots, and the Black Forest name suggests dense woods and steady climbs rather than open, runnable terrain, so aim for durability over speed. The 100K is a sensible step up for runners with a 50-mile finish and a stepping stone toward a 100-miler. Plan a 20-week build with back-to-back long runs, at least one long night run and a rehearsed fueling routine, and give thought to sleeping in the morning before the race so you arrive rested.