11-102. Definitions In the statement of the boundaries in this article: 1. ' To, ' ' on' or ' along' a mountain range or mountains means the summit point or summit line of the mountain range of mountains. 2. ' Up' or ' down' a creek or river means the middle of the main channel thereof. 3. ' Mouth' of a creek or river or ' junction' of a creek or river with a river is the point where the middle of the channel of each intersects the other.
Arizona Legal Code
§ 11.102
Source: https://www.azleg.gov/ars/11/00102.htm· Version 2026