The former Best mine is located in the Rambler Creek basin, a southern tributary to McGuigan Creek. The former Rambler mine (082KSW018) is located 300 metres to the south-southwest. Kaslo, British Columbia lies 28 kilometres to the southeast.
The former Best mine is hosted by an elliptical-shaped quartz diorite stock, known as the Best-Antelope porphyry, occurring almost in the centre of the mine workings. This stock is the principal ore host which has intruded calcareous, massive quartzite, argillite, with interbedded fissile slate and limestone of the Triassic Slocan Group. The average strike of these strata is 115 degrees, dipping 57 degrees southwest. Folding and faulting are prominent along northwest axes. Axial planes of most of the folds and major faults dip steeply southwest. Other small-scale anticline-syncline pairs are of short amplitude with east striking axial planes and dipping southward. The plunge of these folds is 15 degrees west.
Numerous irregular quartz veins, ranging from a few centimetres to 60 centimetres width, occur within the Best-Antelope stock. The more persistent veins follow fault-fissures occurring along joints striking 340 degrees and dipping 25 to 45 degrees northeast.
A 23-metre incline shaft has explored one of these veins. A drift was driven 8 metres from the bottom of this shaft. The vein varied from a few centimetres to 90 centimetres wide and hosted tetrahedrite and jamesonite carrying high silver values. A crosscut adit was driven 37 vertical metres below the shaft. A quartz vein, 15 to 30 centimetres wide and hosting galena and tetrahedrite, was intersected 33 metres from the portal. The vein has a strike of 340 degrees and a dip of 28 degrees northeast, and was drifted along for 24 metres. At 70 metres from the portal a raise was started to connect to the incline adit above. A quartz vein at the foot of the raise, 30 centimetres wide, carries galena, tetrahedrite and sphalerite. About 30 metres beyond the raise along the crosscut, several other mineralized fractures were intersected. The fractures had a strike of 075 degrees and a dip of 73 degrees southeast. The more easterly of these two fractures carried up to 15 centimetres width of quartz with galena and pyrite.
Elsewhere on the Best property, quartz veins in outcrop carry small concentrations of silver-bearing minerals, with galena, sphalerite, pyrite and lesser chalcopyrite locally visible.
Records indicate total production on the Best property was 143 tonnes. From this, 371,556 grams silver, 19,090 kilograms lead and 423 kilograms zinc were recovered. Shipments of hand-sorted ore were made to the Trail smelter in 1971 and 1973 (Exploration in British Columbia 1971 and 1973, pages 422 and 89 respectively). The property was under lease from T. Eccles at this time.
