"Sycan River, Oregon". National Wild and Scenic Rivers System. Retrieved December 19, 2013.
topoquest.com
United States Geological Survey. "United States Geological Survey Topographic Map". TopoQuest. Retrieved April 8, 2011. The relevant map quadrangles from mouth to source are Beatty, Spodue Mountain, Riverbed Butte Spring, Sycan Marsh West, Sycan Marsh East, Pole Butte, Riverbed Butte, Shake Butte, Harvey Creek, and Slide Mountain.