The Fitzsimmons property, first staked in 1901, occurs a few kilometres south of Green Lake on the Squamish-Pemberton Highway. The area is underlain by rocks of the Lower Cretaceous Gambier Group preserved as a roof pendant within plutonic rocks of the Jurassic to Tertiary Coast Plutonic Complex. The dominant lithology at the occurrence is limestone, intruded by porphyry dykes of unknown age or affinity.

Mineralization consists a chalcopyrite-rich zone within sheared and fractured limestone and a sphalerite-rich zone associated with epidote-quartz skarn.

One sample yielded 12.34 grams per tonne gold, 13.71 grams per tonne silver, 1.2 per cent copper and 12.1 per cent zinc (Starr, 1926 (Property File)).