The Sure Thing prospect adjoins the Charleston claim of the Keystone-Charleston group. The prospect is 1.25 kilometres north of the former Charleston mine (082KSW031). Kaslo, British Columbia lies 26 kilometres to the southeast.

The claims were staked to cover the contact between slates, calcareous shales and interbedded limestone bands of the Triassic Slocan Group. This contact strikes 120 degrees and dips 80 degrees southwest and is well defined.

In 1930, workings consisted of two adits and an intermediate level. The upper adit is 21 metres long striking 120 degrees. Small amounts of low-grade ore were exposed intermittently along its length. The lower adit is 87 metres long and runs along a narrow siderite and quartz-filled fissure striking 120 degrees, for most of the adit length. Several raises connect the two adits and the intermediate level. The fissure reached a maximum width of 20 to 30 centimetres and for a length hosts galena. A second similar lens of siderite and galena was exposed near the face of the lower adit.