[Ray76]

Another map

http://www.blm.gov/pgdata/etc/medialib/blm/nv/field_offices/las_vegas_field_office/cattle_trespass.Par.24454.File.dat/TrespassCattleMap_NoticeofIntentMap_3-24-14.pdf

[Paladin2]

Bunkerville grazing area is huge, maybe not so much as it is dry, but it would seem that it's large enough that multiple ranches would have been running cattle there.

Are there fences at the boundaries of these named designated areas?

[Paladin2]

http://www.blm.gov/pgdata/etc/medialib/blm/nv/field_offices/las_vegas_field_office/cattle_trespass.Par.88349.File.dat/Public%20Notice%20of%20Intent%20to%20Impound%20Unauthorized%20Livestock%20Letterhead%20Final%203-19-2014.docx%20%281%29.pdf

The BLM are authorizing themselves to go after a large part of Nevada. Maybe a million Buck$ for Utah cowboys in helicopters is not excessive, assuming homogenous enforcement.