Broad Mountain Road is a hiking, biking, and horse trail in Huntingdon County, Pennsylvania. It is within Greenwood Furnace State Park and Rothrock State Forest. It is 1.8 miles long and begins at 1,122 feet altitude. Traveling the entire trail is 3.5 miles with a total elevation gain of 271 feet. The Parking Area - in Rothrock State Forest parking can be seen along the trail.