The Yellowstone Falls consists of two waterfalls on the Yellowstone River - the Upper and Lower Falls. The Yellowstone River flows north from Yellowstone Lake and leaves the Hayden Valley and plunges over the Upper Falls. A quarter of a mile downstream the river travels over the Lower Yellowstone Falls. The Brink of the Upper Yellowstone Falls (and lower falls) add to the grandeur of the park's complex geologic history in dramatic colors and shapes. The Upper Falls trail is a 0.3-mile moderately trafficked out-and-back trail that features this waterfall and is suitable for all skill levels. This trail is best suited for hiking, walking, and nature trips and is used chiefly from June until October. You can access the path from the sidewalk along the Brink of the Lower Falls parking lot.