Idaho Code § 31-119
Clark county is described as follows: beginning at a point on the Idaho-Montana state line directly north of the point where the east line of section four (4), township thirteen (13) north, range forty-one (41) east, Boise meridian, intersects the north line of said township thirteen (13) north;
Eastern boundary. Thence south to the southeast corner of section thirty-three (33), township thirteen (13) north, range forty-one (41) east, Boise meridian; thence west along the south line of said township thirteen (13) to the southwest corner of section thirty-one (31), township thirteen (13) north, range forty (40) east, Boise meridian; thence south along the range line between range thirty-nine (39) east, Boise meridian, and range forty (40) east, Boise meridian, to its intersection with the south line of township twelve (12) north; thence west along the south line of said township twelve (12) north, to the southeast corner of section thirty-three (33), township twelve (12) north, range thirty-nine (39) east, Boise meridian; thence south to what will be, when surveyed, the southeast corner of section sixteen (16), township ten (10) north, range thirty-nine (39) east, Boise meridian; thence west to the southeast corner of section thirteen (13), township ten (10) north, range thirty-eight (38) east, Boise meridian; thence south along the range line between range thirty-eight (38) east, Boise meridian, and range thirty-nine (39) east, Boise meridian, to its intersection with the south line of township ten (10) north; thence west along the said south line of township ten (10) north, to its intersection with the range line between range thirty-seven (37) east, Boise meridian, and thirty-eight (38) east, Boise meridian; thence south along said range line to its intersection with the south line of township nine (9) north;
Southern boundary. Thence west along south line of said township nine (9), to its intersection with the range line between range thirty-one (31) east, Boise meridian, and range thirty-two (32) east, Boise meridian; thence south along said range line to its intersection with the south line of township eight (8) north; thence west along said township line to the corner of sections three (3), four (4), thirty-three (33) and thirty-four (34), townships seven (7) and eight (8) north, range twenty-nine (29) east, the eastern boundary line of Butte county;
Western boundary. Thence north along the section line and the eastern boundary line of Butte county to the corner of sections three (3), four (4), thirty-three (33) and thirty-four (34), township ten (10) and eleven (11) north, range twenty-nine (29) east; thence east along said township line to its intersection with the range line between range thirty (30) east, Boise meridian, and range thirty-one (31) east, Boise meridian, being the southeast corner of Lemhi county; thence north along said range line to the Idaho-Montana state line;
Northern boundary. Thence easterly along said state line to the point of beginning.
County seat-Dubois.
Idaho Code § 31-119