The Border showing is located near the Canada-United States of America boundary, 5.5 kilometres south of Richter Mountain. The occurrence is located on the Mo 4 claim.

An abandoned 5-metre adit was located during property exploration by Ascent Resources Ltd. From the condition of the workings, the age is estimated as the early 1900s. The ground was restaked and explored in 1985 and 1986 by Ascent Resources Ltd. for the owner, J. King. To the south in the Nighthawk area of Washington State, exploration has been carried out on many properties since the 1880s. From 1989 to 1992, property work was carried out by owner, J. Harris. The Border showing is hosted by granite and granodiorite of the Similkameen intrusion, bordered by syenite of the Kruger pluton. The Kruger pluton forms an east-west trending band 1.3 to 2.0 kilometres long. Central phases of the Similkameen intrusion consist of quartz monzonite and granodiorite phases. Monzonitic phases crosscut both central phases and outer syenite. Roof pendants of metasediments and metavolcanics of the Carboniferous to Permian Kobau Group occur to the immediate east.

During 1985 and 1986, several quartz veins were discovered on the Mo and Border claims. The veins are mineralized with galena, pyrite, sphalerite, chlorite, malachite and sericite. The main vein, exposed in the abandoned adit, strikes 120 degrees and dips 30 to 40 degrees to the southeast. The vein varies from 0.15 to 3.00 metres and has been offset repeatedly by minor left-lateral faults. The contacts with country rock are sharp and defined by shearing and gouge.