The Anna showing is located at about 190 metres elevation, 2 kilometres due south of Bear Mountain and northwest of the Fraser River, near the northeast corner of the Canada Department of Agriculture Agassiz Research Station property.

Regionally, the Anna showing lies east of the Harrison Lake fracture system, a major, northwest trending fault system that separates older rocks on the eastern side of the fault from younger rocks on the western side of the fault. Older rocks on the eastern side of the Harrison Lake fault include Devonian to Permian Chilliwack Group volcanic and sedimentary rocks. The Lower and Middle Jurassic Harrison Lake Formation comprises the dominant lithological unit on the southwestern side of the fault.

At the Anna showing, the country rock is variably metamorphosed gneissic rocks of the Chilliwack Group, which has been intruded by coarse grained, massive granodiorite of Oligocene and/or Miocene age. Limestone lenses are included with the Chilliwack Group. Small, fine grained, quartz diorite dikes locally cut these gneissic rocks. Intense silicification is prevalent in the area.

Garnet-tremolite-clinopyroxene-epidote skarn occurs along the contact of this limestone. Sulphide mineralization consists of bunches or lenses of chalcopyrite and chalcocite with malachite staining in gossanous crystalline limestone (marble). The line of strike of the ore is about 345 degrees. The ore appears to have filled a fissure at one locality, attaining a width of about one metre.

By 1918, an adit at least 7.6 metres long had been excavated, and by 1922 a glory hole/quarry, 8.5 metres long by 5.5 metres wide by about 5.5 metres high at the face, was dug. A carload of ore was reported shipped in 1920.

A sample taken from the ore dump in 1922 yielded 0.69 gram per tonne gold, 192.0 gram per tonne silver and 15 per cent copper (Minister of Mines Annual Report 1922, page 253). Two rock samples of garnet-rich skarn were taken in 1992. Chip sample 92LC01, over 6.1 metres, yielded 0.11 per cent copper and 4.2 grams per tonne silver (Assessment Report 22353). Grab sample 92LC02 yielded 0.42 per cent copper and 5.4 grams per tonne silver (Assessment Report 22353).

In 2011, Bear Mountain Gold Mines Ltd. staked the area as the Harrison South property. The following year, Bear Mountain Gold Mines completed a soil sampling program on the property. This work identified two areas of gold-in-soil anomalies to the north.

In 2017, Haro Metals Corp. completed a program of soil sampling on the area which identified additional gold-in-soil anomalies to the north.