The Reco prospect is located on the east bank of the Similkameen River, 19 kilometres south of Princeton.

The area is underlain by the eastern facies of the Upper Triassic Nicola Group consisting of mafic augite and hornblende porphyritic pyroclastics and flows. These rocks are intruded by diorite and monzonite, locally pyroxenite and gabbro, of the Early Jurassic Copper Mountain and Lost Horse intrusions.

The Reco prospect is hosted in andesitic and cherty tuff, crystal tuff and lapilli tuff of the Nicola Group, 400 to 500 metres south of the Copper Mountain stock (Copper Mountain Intrusions). The Nicola Group volcanics were previously included with the Wolf Creek Formation (Geological Survey of Canada Memoir 171).

These volcanics are cut by a sulphidic calcite vein in a shear zone 2 to 3 metres wide, striking 005 to 040 degrees and dipping 80 degrees northwest. The vein has been traced on surface for 120 metres and is 0.1 to 1.8 metres wide.

The vein contains lenses and pods of massive sulphides comprised of pyrrhotite, pyrite and minor chalcopyrite. A 0.5-metre chip sample taken across a lens of massive pyrrhotite assayed 0.89 per cent copper, 4.8 grams per tonne gold and 1.9 grams per tonne silver (Assessment Report 11617, page 7). A 1-metre chip sample taken in a pit at the north end of the vein assayed 0.4 per cent copper, 0.88 gram per tonne gold and 2.9 grams per tonne silver (Assessment Report 11617, Figure 6). Samples taken from the Reco claim during the 1940's are reported to have assayed up to 17 grams per tonne gold (Assessment Report 15854, page 21).

The previously described vein is cut by a second less continuous quartz-carbonate vein, 0.25 metre wide. This structure is hosted in a 2.5-metre wide shear zone striking north and dipping steeply west. The vein is mineralized with stringers of pyrite and traces of chalcopyrite. A sample from this vein assayed 1.3 per cent copper and 4.98 grams per tonne gold (Assessment Report 20268, page 10).

This prospect was explored as early as 1907. A 167-metre long tunnel was driven under the vein outcrops between 1907 and 1909. Various operators carried out geological, geochemical and geophysical surveys between 1968 and 1990, including most recently, Similco Mines Ltd.