The Lucky Boy Extension occurrence is located just east of the junction of Skookum and Fish creeks on the bank of a small creek southeast of Fish Creek, 500 metres east-southeast of the summit of Mountain View, 6 kilometres north-northwest of Stewart.

The area is underlain by thinly bedded greywacke and tuffaceous greywacke of the Lower Jurassic Hazelton Group near the contact with intrusive rocks of the Eocene Coast Plutonic Complex. The Lucky Boy Extension showing consists of an adit driven to intersect quartz stringer veins hosted in a shear zone up to 0.91 metre wide. The stringer veins have an aggregate width of 15 to 40 centimetres and are locally mineralized with pyrite, galena, sphalerite and trace amounts of pyrrhotite and chalcopyrite. The vein strikes 300 degrees and dips 40 to 55 degrees north.