Idaho Code § 31-120
Clearwater county is described as follows: beginning at the mouth of Lolo creek;
Southern boundary. Thence in a northeasterly direction up the middle of the channel to the head of said Lolo creek; thence northeasterly in a direct line to a point where the Montana-Idaho state line intersects the Lolo pass at the summit of the Bitterroot mountains;
Eastern boundary. Thence in a northwesterly direction along said Montana-Idaho state line to the intersection of the same with the northern boundary of township forty-one (41) north;
Northern boundary. Thence west along said northern boundary line to the north quarter corner of section three (3), township forty-one (41) north, range one (1) east, being the northeast corner of Clearwater county with Shoshone county to the north and Latah county to the west;
Western boundary. Thence south along midsection lines, approximately 6 miles to the south quarter corner of section thirty-four (34), township forty-one (41) north, range one (1) east;
Thence west along the township line, approximately 22.8 chains (1,505 feet) to the west sixteenth corner of section three (3), township forty (40) north, range one (1) east;
Thence south along sixteenth section subdivision lines, approximately 1 mile to the west sixteenth corner of sections three (3) and ten (10), township forty (40) north, range one (1) east;
Thence west along the section line, 90 feet to a duly surveyed property corner monument;
Thence south along the property line, approximately 1 quarter mile to a duly surveyed property corner monument;
Thence east along the section subdivision line, 90 feet to the northwest sixteenth corner of section ten (10), township forty (40) north, range one (1) east;
Thence south along sixteenth section subdivision lines, approximately 4 and 3 quarter miles to the west sixteenth corner of sections thirty-four (34) and three (3), townships forty (40) north and thirty-nine (39) north, range one (1) east;
Thence west along the township line, approximately 90 feet to an unmonumented point;
Thence south approximately 1 half mile to a duly surveyed property corner monument;
Thence south approximately 1 half mile to a duly surveyed property corner on the south line of section three (3), township thirty-nine (39) north, range one (1) east;
Thence west along the section line approximately 1230 feet to the northeast corner of section 9, township thirty-nine (39) north, range one (1) east;
Thence south along section lines, approximately 5 miles to the southeast corner of section thirty-three (33), township thirty-nine (39) north, range one (1) east;
Thence east along the township line, approximately 5.83 chains (385 feet) to the northeast corner of section four (4), township thirty-eight (38) north, range one (1) east;
Thence south along section lines, approximately 3 miles to the middle line of the township, and the southeast corner of section sixteen (16), township thirty-eight (38) north, range one (1) east, being the southeast corner of Latah county with Clearwater county to the east and south; thence west along said middle line of township thirty-eight (38) north, to the northwest corner of section twenty-two (22), township thirty-eight (38) north, range one (1) west; thence south to the north boundary line of the Nez Perce Indian reservation; thence easterly along said reservation line to the intersection of the same with the line running south between sections fifteen (15) and sixteen (16), township thirty-seven (37) north, range one (1) west; thence south on the said line between sections fifteen (15) and sixteen (16) to the middle of the channel of Clearwater river; thence up the middle of the channel of said Clearwater river to a point where the same is intersected by the section line between sections five (5) and six (6), township thirty-six (36) north, range one (1) east; thence south on the section line between said sections five (5) and six (6) to the middle of the channel of Little Canyon creek; thence up the middle of the channel of Little Canyon creek to a point where the same intersects the seventh (7th) standard parallel north; thence east along said parallel to the middle of the channel of Clearwater river; thence up the middle of the channel of said Clearwater river to the point of beginning.
County seat-Orofino.
Idaho Code § 31-120