Nearest to Great Falls’ city limits, Black Eagle Falls are 2.5 miles [4 km] above Rainbow Falls. At 26 feet [8 meters] high and 600 yards [549 meters], these falls were the first to be dammed in 1890. From the top of these falls, the confluence of the Missouri River with the Sun River is visible and from the bottom, Black Eagle Memorial Island Park gives you the closest breathtaking vantage possible.