Massacre Rocks State Park is a history-focused public recreation area in the Northwest United States featuring the Massacre Rocks, a famous spot along the Oregon Trail and California Trail during the middle 19th century. The state park is located along the Snake River, ten miles (16 km) southwest of American Falls, in Power County, Idaho.

Interstate 86 (I-86) is an east–west intrastate Interstate Highway located entirely within the state of Idaho. It runs approximately 63 miles (101 km) from an intersection with I-84 east of Declo in rural Cassia County, to an intersection with I-15 in Chubbuck, just north of Pocatello. The highway is part of the main route from Boise and Twin Falls to Idaho Falls and the upper Snake River region.