The May Blossom showing is located on the west side of the Salmo River, 3.5 kilometres southwest of Ymir. The showing is east of the Free Silver showing (082FSW277). The claim was staked in 1897 and development includes a shaft and an adit.

The property is located at 1372 metres elevation on the west side of the Salmo River, 3.5 kilometres southwest of Ymir.

The Free Silver claim (Lot 2902) was staked in June 1896 by J.M. McLaren and Crown-granted in 1902 to P.W. Thompson and associates. Adjacent ground was subsequently staked as the Ruby, Silver Fr., Victor, Royal, and Galena claims (Lots 2904 - 2906', 5322, 4553 respectively). Further activity was reported in 1908 and 1915 when the property was owned by T. Bennett, J.H. Schofield and associates; the only work reported is trenching.

The May Blossom claim (Lot 5666), which adjoins and lies east of the Free Silver claim, was staked in May 1897 by W. Birmingham. Subsequent staking included the May Day (Lot 13468), May Flower, Big Diamond, and Electric claims. Early development work was by American interests under the name May Blossom Mining & Milling Company. By 1915, the claims were held by J.F. Harbottle and associates. Development work to date included a 12-metre vertical shaft and a 69-metre adit on the May Blossom claim.

Washington interests, under the name Gibraltar Mining Company, optioned the May Blossom and Free Silver groups in 1921 but no work was reported. Harbottle and associates held the May Blossom group until 1930 or later.

The Free Silver claim was owned in 1977 by R. Spain, of Trail; prospecting of old trenches was reported.

The area is underlain by sedimentary and volcanic rocks of the Lower Jurassic Elise and Hall formations of the Rossland Group. These have been intruded by Tertiary rhyolite dykes and monzonite of the Middle Eocene Coryell Intrusions.

A quartz vein carrying some galena, pyrite, and chalcopyrite occurs at the contact between a quartz monzonite porphyry and an augite porphyry sill of the Elise Formation. The vein is reported to be narrow (about 1 to 4 centimetres) but is silicified and "altered"(?) for about 0.5 metre on each side of the vein. The vein strikes 322 degrees and dips 82 degrees northeast. Galena occurs as narrow stringers and reportedly assays up to 1371.2 grams per tonne silver and has low gold values.

Later reports identify some scheelite in skarn mineralization and some molybdenite in the quartz veining. The records indicate that the mineralization is not extensive and the best accumulation of sulphides was the galena rich material near the portal. "A few hundred pounds of manganese ore was reported shipped", but the source is not identified.