The Sunset past producer is located 500 metres east of the Wellington occurrence (082KSW030), between Murray and Whitewater creeks. The historic mining town of Retallack, British Columbia is located 1.5 kilometres to the south.

The Sunset Crown grant (Lot 970), adjoining the Wellington property to the east, was staked in 1896 by R.E. Lemon and associates. Much of the development work was carried out in 1890 and in the following year the Gold Field Syndicate leased the property. It is reported that much of the work was done on the lower level of the Wellington mine from which a considerable tonnage of silver-lead ore was mined. At that time the workings consisted of four shallow shafts, two crosscut adits and two intermediate levels. In 1925, the Sunset claim became entangled in legal disputes and no property work was done since this time. In the 1930s, the Wellington property was owned by the A.H. Buchanan Estate.

Underlying rocks of the Triassic Slocan Group consist of slates and slaty argillites, striking 270 to 300 degrees and dipping 50 degrees northeast. One narrow quartzite bed was observed at the intersection of the lower crosscut with the lode. For a detailed account of the geology see the Wellington occurrence.

At the Sunset occurrence the lode strikes nearly 090 degrees and dips 55 degrees north, at an oblique angle to the enclosing strata. Vein material consists of sphalerite, galena, tetrahedrite and pyrite in a quartz gangue but containing some siderite. Sphalerite appears to have been the chief sulphide mineral, locally having a dense cherty appearance.

According to Cairnes (1935), a 57-tonne shipment of lead-zinc ore made in 1901 yielded 585.76 grams per tonne silver and 26.5 per cent lead (Geological Survey of Canada Memoir 184, page 248). Production in 1901 is reported as 47 tonnes with recoveries of 258,718 grams of silver and 12,522 kilograms of lead (Minister of Mines Annual Report Index 3, page 215).