The Swanson Quarry is a small granite quarry located about 1 kilometre west of Sechelt.

The quarry was developed in Jurassic granodiorite of the Jurassic to Tertiary Coast Plutonic Complex.

A small granite quarry was located on the top of a rounded knoll, about 0.64 kilometres southwest of the Porpoise Bay wharf at Sechelt. A similar granite quarry, the Trail Bay (092GNW051), lies 1.4 kilometres to the southwest.

The granodiorite is medium to coarse-grained and light grey in colour. Thin sections show the rock to be comprised of quartz and oligoclase-andesine, with lesser amounts of orthoclase, biotite and hornblende. The granodiorite is cut by many vertical joints spaced 0.3 to 1.8 metres apart. Blocks with dimensions of up to 0.9 by 0.9 by 0.9 metres have been removed from the quarry.

The quarry was opened in 1970 by L. and H. Swanson of Sechelt. Some time after its opening the quarry was observed to be 37 metres wide with a 2.4 to 3 metre high face. No production figures are available.