New Mexico-Oklahoma-Texas tri-point

Upon inspection of a detailed map, one finds that the northwest corner of Texas' panhandle is not the same point as the southwest corner of Oklahoma's panhandle.  This is because New Mexico "wraps" around the Texas panhandle for about two miles before it reaches Oklahoma:

It includes a diagram illustrating the tri-state point and noting the township, range, and section numbers for the corners of NM and OK (Texas was not surveyed under the PLSS).  But notice that the benchmark does not specify that the actual point is located a certain number of feet towards the northeast (where the road intersection is located).  This indicates that the actual tri-state point is exactly at the location of the benchmark... which means between the benchmark and the road is a very narrow strip of NM and OK.  For example, in the photo above, I was actually standing in the extreme southwest corner of Oklahoma's panhandle, even though I was on the south side of the fence.

A couple other things to note here: the north-south road (shown running off into the distance above) also marks the Cimarron Meridian.  About 200 feet in that direction (north) is where that meridian intersects its baseline, and another survey monument is located there.  That is the initial point for the entire Oklahoma panhandle; all surveys are referenced to that point.  Also, the northwest corner of Texas' panhandle is a mile or two to the west (left).

Research and/or photo credits: Jeff Morrison; Dale Sanderson