Join a ranger-led "Layers of History" hike. Trek behind South Falls and discover the powerful geologic processes that formed the falls and the many intriguing figures who shaped the park's history. The 3/4-mile hike gains 177 feet on paved and gravel surfaces. Please dress for being in the outdoors including sturdy shoes. Please note that pets are allowed on a leash in the South Falls Historic District but are not allowed on the portion of the hike into the canyon. Call (503) 874-0201 for more info.