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OOOoJ~ .. dering the valley on the north. The valley lies a few miles to the west 01 lhe Continental Divide and oc- cupies the middle porlion of lhe headwaters area of the Snake River. A 159-mile section of the Mis- souri River in Montana from Fort Benton downstream to Robinson Bridge has recently been added to the National Wild and Scenic Rivers System This last remaining major free-flowing portion 01 the Missouri is unlike any other river in the re- gion II passes through the Missouri Breaks. a highly-eroded "badland" type topography_ Unusual eroded sandstone formations resembling castles, parapets. and other ancient structures border the river, which is generally wide and slow-moving. Outcroppings 01 dark intrusive rock thrust upward through this while sandstone, torming what appears to be huge manmade walls of rec. tangular blocks_ Important historic evidence of early Trappers. settlers. and explor. ers, including Lewis and Clark. is found near the river. Occasionally there are sightings of rare species, such as the black.looled lerret and the bald and golden eagles, in the abundant wildlife, The opportunity to view lhe wildlife and unique geo. logic leatures combines with the stow wanderings 01 the river to pro. vide a unique boating experience The study of the Upper Iowa River. in the Northeast corner 01 Iowa. was completed in May 1972. The report recommended State ad- ministration of the river corridor. The Gasconade River in Missouri is one of the eight "instant" rivers added to the National System in October 1968 The U S. Forest Serv- ice has management responsibility for the area A small segment of the Sweet- warer River in central Wyoming is being studied Completion date is scheduled for June 1979, I I Sheer sands/one c!ll!s line the Upper y,ssourtR,ver 29