The Wire Gold occurrence is located 3 kilometres east of the Portland Canal, 7.5 kilometres south-southeast of Stewart. The Wire Gold showing is one of three showings comprising the Rainbow property, the other two are the Fraser (103P 097) and the North Fork (103P 098).

The Wire Gold showing consists of a 0.3 to 2.0 metre wide quartz vein, striking 054 to 065 degrees and dipping 65 to 70 degrees northwest. The vein is hosted in granodiorite of the Eocene Hyder pluton of the Coast Plutonic Complex and extends along surface for approximately 1370 metres. Mineralization consists of massive pyrite with minor galena, arsenopyrite and visible gold.

Grab samples of the vein have assayed up to 15.3 grams per tonne gold and 9.9 grams per tonne silver (Assessment Report 13402, page 14).

In 1912, the Wire Gold group consisting of nine claims was staked by G.W. Bruggy and associates. A tunnel was driven on the vein for a distance of 12 metres. It can be seen in oxidized spots in the perpendicular bluffs above.