The Lill 5 (Discovery, Road and River) occurrence is located south of the Lillooet River, near its mouth on Lillooet Lake.

Regionally, the area is situated on the southwest flank of the Jurassic to Cretaceous Coast Crystalline Belt, which is composed of granite, granodiorite, quartz monzonite and quartz diorite.

Locally, the showing is primarily underlain by a roof pendant composed of metamorphosed volcanics, sediments and intrusions of the Upper Triassic Cadwallader Group. The Cadwallader Group consists mainly of andesitic greenstone, tuffs and flows; rhyolitic tuffs and flows with minor limestone lenses, argillite, phyllite, conglomerate and chert. Contact metamorphism is evident along or adjacent to limestone-volcanic contacts, indicated by the development of skarn.

Locally, a 1 metre wide, northeast trending and steeply dipping, shear zone hosts banded massive sulphide mineralization consisting of chalcopyrite and pyrite with lesser sphalerite and galena. The mineralization is associated with chlorite, quartz and magnetite. The zone has been traced for approximately 150 metres. A 0.6 metre limestone bed is reported to be in close proximity to the zone.

In 1988, seven grab samples across 2.1 metres yielded from 0.02 to 7.83 per cent copper, 0.02 to 0.47 per cent lead, 1.28 to 8.83 per cent zinc and 1.4 to 86.2 grams per tonne silver (Property File - Green Lake Resources Ltd. [1988-03-29]: News Release - Winter Programs completed on Lill, Golden Plug and Native Properties). Also at this time, diamond drilling yielded up to 0.11 per cent copper, 2.49 per cent zinc and 19.5 grams per tonne silver over 2.9 metres from hole 88-2 and 0.03 per cent copper, 1.03 per cent zinc and 5.5 grams per tonne silver over 4.2 metres from hole 88-3 (Property File - Green Lake Resources Ltd. [1988-03-29]: News Release - Winter Programs completed on Lill, Golden Plug and Native Properties).

Another zone of similar mineralization, referred to as the ‘River’ zone, is reported approximately 150 metres northwest and consists of a 2.5 metre wide band hosting zones of massive pyrite, chalcopyrite and sphalerite.

Since 1915, the area has been explored in conjunction with the nearby Lake Adit (MINFILE 092JSE009) occurrence. In 1985, Lawrence Mining examined the property. During 1986 through 1988, Green Lake Resources Ltd. completed a detailed exploration programs including rock and soil sampling, geological mapping, geophysical surveys and diamond drilling on the area as the Lill claims.