Oregon Revised Statutes Counties and County Officers § 201.010

(1) Commencing at the intersection of Powder River with Snake River; thence up the main channel of Powder River to the intersection of North Powder River with Powder River; thence up the main channel of North Powder River to the mouth of the Anthony Fork of North Powder River; thence up the main channel of Anthony Fork of North Powder River to the largest lake near the source of Anthony Fork, which lake is used as a reservoir for the Camp Carson mines; thence due west to the summit of the chain of mountains, known as the Blue Mountains, that separate the waters of Powder River and Burnt River on the east from the waters of John Day River on the west; thence southerly along the summit of such chain of mountains between the waters of Powder and Burnt Rivers on the east and the waters of John Day River on the west to a point where The Dalles military road crosses the summit of the Blue Mountains; thence due east to a point where the range line of the United States surveys will be intersected between ranges 36 and 37 east of the Willamette Meridian; thence due south to the state line on the forty-second parallel of north latitude; thence due east along the state line to the intersection of the state boundary line between Idaho territory and Oregon; thence due north to the mouth of the Owyhee River; thence down the middle of the main channel of Snake River to the mouth of the Powder River to the place of beginning.

(2) Commencing at the intersection of the township line between townships 6 and 7 south, range 40 east, with Powder River; thence east on such township line to the center of range 42 east; thence north to the township line between townships 5 and 6 south; thence east on the township line between townships 5 and 6 south to the Wallowa County line; thence easterly along the Wallowa County line to Snake River; thence up and along Snake River to the mouth of Powder River; thence up and along Powder River to the place of the beginning.