United States Geological Survey (USGS). United States Geological Survey Topographic Map. TopoQuest. [July 1, 2009]. (原始内容存档于2018-11-08). The maps, which include river mile (RM) markers from the mouth to the downstream end of Wallowa Lake at RM 50 or river kilometer (RK) 80, cover the following quadrangles from mouth to source: Rondowa, Howard Butte, Minam, Wallowa, Evans, Lostine, Enterprise, Joseph NW, and Joseph.
United States Geological Survey (USGS). United States Geological Survey Topographic Map. TopoQuest. [July 1, 2009]. (原始内容存档于2018-11-08). The maps, which include river mile (RM) markers from the mouth to the downstream end of Wallowa Lake at RM 50 or river kilometer (RK) 80, cover the following quadrangles from mouth to source: Rondowa, Howard Butte, Minam, Wallowa, Evans, Lostine, Enterprise, Joseph NW, and Joseph.