Pike National Historic Trail Study Act This bill requires the National Park Service to study the Pike National Historic Trail for designation as a national scenic trail. The trail consists of a series of routes extending approximately 3,664 miles that follows the route taken by Lt. Zebulon Montgomery Pike during the 1806-1807 Pike expedition that began in Fort Bellefontaine, Missouri, and continued through parts of Kansas, Nebraska, Colorado, New Mexico, and Texas, before ending in Natchitoches, Louisiana.