San Luis Pass, New Mexico

San Luis Pass is a dirt road that goes over the Continental Divide, four miles north of the border. It once was a county road, and the only connection between the Animas and Playas Valleys, but is now controlled by the landowners, the Diamond A Ranch, which keep it closed and off limits to the public, rendering the southernmost pass over the Divide impassable. The Divide stays along the crest of the Animas Mountains, with the Animas Valley on the west side, and the Playas Valley on the east side. This is nearly all private land, mostly large private ranches, zealously posted and gated, and crawling with Border Patrol officers.