📍Iargo Springs Interpretive Site, Oscoda Iargo Springs is located near the Huron-Manistee National Forest off of the River Road National Scenic Byway in Oscoda, MI. The springs and surrounding forest area have been preserved and managed by the USDA Forest Service since 1934. The Interpretive Site includes large natural springs along the banks of the AuSable River and Cooke Dam Pond. After desending down the almost 300 steps to the spring area, there is a boardwalk and observation deck to take i