The Bunker Hill showing is located west of the Kitsault River on the north side of La Rose Creek, 8.5 kilometres north-northwest of Alice Arm. A sulphide-rich quartz vein was explored by trenching and tunnelling between 1923 and 1925. The vein has been traced for 61 metres by a short adit and a series of trenches.

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 Bunker Hill showings consist of a quartz breccia vein that follows a northwest striking, steeply east dipping fault zone in interbedded black siltstone, greywacke and pebble conglomerate of the Stuhini Group. The showings are situated about 1219 metres south of the La Rose workings (103P 170) in a prominent creek canyon on the south slope of Tsimstol (Haystack) Mountain. The creek follows a major northwest striking, steeply east dipping fault zone which has developed along closely-spaced bedding plane shears in iron-stained black siltstones. Some interbedded greywacke with lenses of poorly sorted pebble conglomerate exhibiting a cataclastic texture is also evident. At an elevation of 609 metres, 9 metres above the creek, a 30 to 38 centimetre wide quartz breccia vein, following a northwest striking, east-dipping fault, contains lenses of near massive sulphides including medium-grained pyrite, galena, sphalerite, and chalcopyrite. Banding parallel to the vein walls is well developed in the more massive sections. The vein is developed at this point by a short tunnel, open at both ends, along the east bank of the creek. Below the tunnel at creek level, a crosscut adit apparently collared to intersect the vein, was driven only 1.5 metres. Here, a 0.9 metre wide, northeast striking lamprophyre dike is offset a metre by northwest faults three times, over a strike length of 4.5 metres. The quartz-breccia-sulphide vein, varying in width from 10 to 25 centimetres, was followed northwest from the tunnel along the east side of the creek for a distance of nearly 61 metres. Several northeast striking mafic dikes, ranging in width from 0.9 to 9 metres, exhibit left-hand displacement of a metre on either side of the fault followed by the vein. In 1969, a rock chip taken across a 17 centimetre wide vein about 18 metres north of the tunnel, assayed 15.8 grams per tonne gold, 482 grams per tonne silver, 0.13 per cent copper, 10.47 per cent lead and 5.0 per cent zinc (Geology, Exploration and Mining in British Columbia 1969). In 1923, a 0.61 metre chip sample taken across massive sulphides yielded 11.0 grams per tonne gold, 240 grams per tonne silver and 2.0 per cent lead (Minister of Mines Annual Report 1923, page 57).

The B and C showing is nearby and 400 metres southeast. This vein is a 15 centimetre wide quartz stringer with a little calcite, arsenopyrite, pyrrhotite, pyrite, sphalerite and galena hosted in a slate formation. It is locally fissured and seems to be mixed up with dike rock. Past work consists of one opencut.