Yellow is a hiking and biking trail in Tinicum Townshp, Pennsylvania. It is within Tohickon Valley Park, Ralph Stover State Park, and Tohicken Valley Park. It is 1.5 miles long and begins at 403 feet altitude. Traveling the entire trail is 3.1 miles with a total elevation gain of 559 feet. The 22, 20, 21, and 19 camp sites are near the trailhead. Along the trail there are viewpoints, a parking, and a cliff.