The Goldslide Creek showing is located 16 kilometres east of Stewart in the upper cirque of the creek. The area was investigated during the 1960s for molybdenite mineralization. The Red Mountain discovery (103P 086) is located approximately 750 metres up the creek from this showing.

The area is underlain by sediments of the Middle to Upper Jurassic Hazelton Group intruded by Early Jurassic dioritic stocks and dikes of the Gamsby Complex or Goldslide stock.

The showing is underlain by a sequence of thinly laminated and bedded siliceous siltstone, argillite and metaquartzite. The sediments grade from dominantly quartzite to poorly banded, near homogeneous chert. The sediments strike northwest and dip steeply south. Quartz hornblende diorite porphyry occurs along the contact between chert and siliceous sediments. Pyritic zones or veins, striking 025 degrees and dipping vertically, cut variably fractured porphyry and locally extend into the country rock. Quartz veining, propylitic alteration and replacement are widespread. Mineralization consists of molybdenite, pyrite and chalcopyrite. Pyrite and apatite are ubiquitous but are concentrated in mafic phases. The best assay from this area was 0.026 per cent molybdenum, 0.03 per cent copper and trace gold (Assessment Report 7152).

It is possible that the granodiorite at McAdam Point (103P 220) extends to this area and if so the stock would be 137 metres below surface, it is speculated that the porphyry and granodiorite are related.