Phil MacCabe '00-'02, who provided the above map, notes that as of 2002, the mission now includes Lake Havasu City, Parker, and Quartzite, Arizona, as well as Blythe and Needles, California.
Gerrit Smith '95-'97 writes regarding the boundary line between the two Nevada missions:
"I-15 north until I-15 and 95 meet. The border then follows 95 through the northwest corner of [Las Vegas] valley. Shortly outside of the Vegas valley, the border takes a turn Due north all the way to the top of the state (passing just east of Winnemucca).
"The Nevada Las Vegas Mission now encompasses Mesquite, Pioche, Hiko, Ely, Elko, etc."