Cal. Gov. Code § 23114
The boundaries of Inyo County are as follows:
Beginning at the southeast corner of Tulare, being the point of intersection of the sixth standard south, Mount Diablo Base, with the summit line of the Sierra Nevada Mountains; thence east, by said standard and extension thereof, to the western boundary of T. 19 N., R. 12 E., San Bernardino Base and Meridian, thence north along said western boundary to the northern line of said township, thence east along the northern line of said township to the eastern boundary of the State, forming the southeast corner; thence northwesterly, on the state line, to the southeast corner of Mono; thence west on the southern line of Mono to the summit of the Sierra Nevada Mountains, being on the eastern line of Fresno, and forming the southwest corner of Mono and northwest corner of Inyo; thence southeasterly on said summit line to the place of beginning.
Ca. Gov. Code § 23114