The La Rose deposit is located on the east flank of Tsimstol Mountain west of the Kitsault River, 9.75 kilometres north-northwest of Alice Arm. A few small shipments of high-grade ore were made from this deposit between 1918 and 1927.

The region is underlain by an assemblage of volcanics and sediments comprising the Upper Triassic Stuhini Group and the Jurassic Hazelton Group. These are folded into a north to northwest trending anticline-syncline pair.

The showing consists of a quartz-breccia vein which follows a shear zone in thinly laminated dark grey to black siltstones and locally interbedded massive reddish brown greywackes of the Stuhini Group. These rocks strike northwest and dip to the northeast. The vein and shear zone strike north and dip 75 degrees east at surface, at 46 metres depth the strike is northwest and the dip is 60 degrees east. The shear zone parallels bedding and has been traced south for about 800 metres onto the Speculator #2 claim (Lot 886). The vein, 0.3 to 0.9 metre wide, occurs sporadically along the shear zone.

Mineralization consists of pyrite, pyrrhotite, arsenopyrite, galena, sphalerite, tetrahedrite, ruby silver (pyrargyrite), argentite and native silver in a gangue of milky white quartz commonly containing brecciated siltstone fragments. A 0.61 metre chip sample assayed 2.06 grams per tonne gold and 8364 grams per tonne silver (Minister of Mines Annual Report 1928, page 84).

The Speculator No.2 claim (Lot 886) is 487 metres south of the La Rose shaft. The principal showing is a quartz-breccia vein adjacent to the same gully as the La Rose vein. The vein, which dips steeply east, was explored by an inclined shaft sunk near the northeast corner of the claim in 1926. The shaft is now caved (ca. 1968). A grab sample from the dump of vein material, consisting of quartz with angular siltstone fragments and pyrite, galena and sphalerite, assayed a trace of silver (Minister of Mines Annual Report 1968).

Between 1918 and 1927, 72 tonnes of hand-sorted ore with an average grade of 6.47 grams per tonne gold, 6908.75 grams per tonne silver, 3.21 per cent lead and 4.27 per cent zinc were mined and shipped from this deposit.

Silver mineralization was discovered on the steep east slope of Tsimstol (Haystack) Mountain prior to 1916. The La Rose quartz-breccia vein occurs along a prominent north-south depression at an elevation of 640 metres, and was originally explored by a shallow inclined shaft. Some ore was shipped in 1918 and 1919, and in 1920 the Alice Arm LaRose Mining Company was incorporated. In 1925, a crosscut adit was driven in a southeasterly direction toward the shaft from a point 38 metres vertically below it. The vein was intersected 106 metres from the portal and drifts were driven north and south. According to old reports, the best mineralization was encountered between the south drift and the shaft. Ore was shipped in 1926 and 1927, but since that time the property has remained idle (ca. 1968).

In 2005, Kitsault Resources Ltd. completed a reconnaissance stream sediment survey on the area as the Kitsault Gold property.