The Alamo occurrence is located at about 1814 metres elevation on the west side of the Howson Creek basin. New Denver is located 5.5 kilometres to the northwest. The occurrence is covered by the Alamo (Lot 737), Ivy Leaf (Lot 738) and Twin Lakes (Lot 747) Crown grants.

The Alamo occurrence was first discovered and staked in 1892. The Alamo, Ivy Leaf and Twin Lakes claims were Crown granted in 1895 to N.D. Moore and R. McFerran. In 1896, the Twin Lakes Crown grant was transferred to the Alamo Mining Company. A 2164-metre tramway was built in 1894 to supply ore feed to a 45.4-tonne per day mill, the first mill in the Slocan area. In 1897, Scottish Colonial Gold Fields Limited acquired the Alamo and Idaho (082FNW007) properties. These properties were then transferred to the Idaho-Alamo Consolidated Mines Limited in 1903. By 1904, most the ore mined from the Alamo occurrence had come from the upper four levels, consisting of 305 metres of drifts. A fifth level was later added and consisted of 305 metres of crosscut and drift. The five levels extended over about 213 vertical metres. C. Cunningham acquired the Alamo and Idaho properties in 1916. In 1926, Cunningham Mines Limited was incorporated. Lessees were reported to have made an ore shipment from the No. 2 level in 1926 and 1928. The Consolidated Queen Bess Mines Limited was incorporated in 1928 when the Alamo, Idaho and Queen Bess (082FNW010) properties were amalgamated. Hemsworth and associates obtained the property in 1947, after the death of Mr. Cunningham. Work was reported on the No. 5 adit by Alamo Silver-Lead Mining Company Ltd. in 1948. An agreement was reached between Cunningham Mines Ltd., Bralorne Mines Limited and Kelowna Exploration Company Limited to incorporate Bess Mines Limited in the following year. An option was acquired on the Idaho, Alamo and Queen Bess properties with development work confined to the latter.

The Alamo occurrence is hosted by massive, banded argillites and quartzites of the Triassic Slocan Group. These metasediments have a gentle dip with minor folding and faulting and are intruded by two quartz diorite stocks. On the north or footwall side of the Alamo occurrence, strata are overturned while those on the hangingwall are right-side-up. These represent displaced limbs of a large-scale dragfold with a near horizontal axial plane. The lode is deflected from its west-southwest strike to a northwest strike following bedding in this vicinity.

The lode consists of a curving vein of steep to shallow dip where hostrocks have been brecciated and cemented by quartz. The strike changes from 250 to 290 degrees. The dip averages about 60 degrees south but varies considerably. The lode varies in width from a few centimetres up to 3 metres thick with ore shoots composed of massive galena, tetrahedrite and minor sphalerite in a gangue of quartz, siderite, calcite and brecciated hostrock. A small amount of pyrargyrite was associated with galena and tetrahedrite was prominent in the higher grade ore. Pyrite and chalcopyrite were also present with chalcopyrite locally forming unusually high proportions for ores from this area. Quartz was the dominant gangue mineral and higher grade silver values were reported associated with finely crystalline vuggy quartz.

The main ore shoot extends from surface to 15 metres below the No. 4 level and plunges to the east and formed in the upper part of the steep buckle of the lode. The maximum length is about 152 metres, between the Nos. 1 and 2 levels and decreases on lower levels to less than 61 metres on the No. 4 level. The lower workings are reported to contain ore richer in sphalerite. It is important to note that the hangingwall of the more productive sections of the workings were hosted by porphyry dikes.

A total of 538 tonnes of ore is recorded as mined from the Alamo occurrence periodically between 1920 and 1969. From this ore 976,199 grams of silver, 155 grams of gold, 55,563 kilograms of lead, 47,240 kilograms of zinc and 38 kilograms of cadmium are reported recovered.

During 2005 through 2014, Klondike Silver Corp. examined the area as apart of their Slocan Silver Camp property.