The Grotto North occurrence is located on the north side of Hardscrabble Creek, at an elevation of 250 metres and approximately 2.1 kilometres west of the Skeena River.

The area is underlain by a sequence of volcanic and sedimentary rocks that have been mapped as Early Jurassic Hazelton Group or more recently as Early Jurassic Kitselas volcanics. The Kitselas volcanics are predominantly of felsic composition. These have been intruded by granites, granodiorites and diorites of the Eocene Carpenter Creek pluton.

Locally, silicified greenstones in association with a quartz-feldspar dike host 0.15 metre wide quartz veins with pyrite-telluride mineralization and hematite-limonite alteration.

In 2011, five rock samples (2960 through 2964) yielded an average of 550 grams per tonne silver, 0.082 per cent lead, 0.010 per cent tellurium and 0.441 per cent bismuth (Assessment Report 32967). In 2012, two samples (3027 and 3028) assayed 11.90 and 11.08 grams per tonne gold, 147 and 49 grams per tonne silver, 5.89 and 1.075 per cent copper and 0.185 and 0.501 per cent zinc, respectively (Assessment Report 33429).

In 2002, the Carlson group of mineral claims was staked by G.W. Kurz. During 2003 through 2014, various programs of bedrock prospecting, rock chip sampling, geological mapping, a ground self-potential geophysical survey and geochemical soil and silt sampling were completed.