Find and log three caches with "Tri-State" in the name. These caches must be within .2 miles of a point where three states meet. Each of the three shared points must be unique. Example:You could use a qualifying cache where Utah, Arizona and Nevada meet and you could also use a qualifying cache where Nevada, Arizona and California meet. Caches placed before and after this cache is published will qualify but they must have "tri-state" in the title and be within .2 miles of the common point. Idaho, Utah and Nevada would work. New Mexico, Texas and Colorado is another. How about Colorado, Wyoming and Utah or Utah, Idaho and Nevada. There are many in other parts of the country where the states are smaller. If you have any questions write me a note.
Here are three of my qualifying caches with GC codes and qualifying states.
GCG903- The cache is listed in New York and is within 528 feet of point shared by PA and NJ.
GC11D2 is listed in Nevada and is within 528 feet of a common point with UT and AZ.
GCH72A is listed in Tennessee, and shares a point with GA and SC.
See GC1PAWZ Points involving Canadian provinces and Mexican states can qualify as well.