Alvin McDonald

Alvin Frank McDonald (1873 – December 15, 1893) was an early American caver and tour guide at what became Wind Cave National Park in South Dakota, the sixth longest cave system in the world, from 1889 to 1893.

From the age of 16 until he was 20, he discovered and mapped the first 8 to 10 miles (13 to 16 km) of the cave using candlelight. His exploration and mapping was so extensive and thorough for the time that it was not until 1963, 70 years after Alvin McDonald's death, that major new passageways were discovered in Wind Cave.

McDonald was born in Franklin County, Iowa, and moved to Wind Cave in 1890. His father, Jesse D., had been hired in 1889 by the South Dakota Mining Company to oversee the company's "mining claim". It is not known if the mining company expected to find minerals of value in the cave or just planned on developing it for tours. The McDonald family decided to attempt to make a living from the cave by developing it with enlarged passageways and wooden ladders and steps with the hope of attracting travelers from nearby Hot Springs.

Alvin McDonald fell in love with the cave, and in the few years he lived there he systematically explored about 8 to 10 miles (13 to 16 km) of passageways. He kept a journal in which he described his exploration of the cave and the naming of the rooms and passageways. He explored the cave with candlelight and rolled out string to mark his way out of the cave. He shared his passion for the cave with visitors by becoming, in his own words, "the chief guide" at Wind Cave.

McDonald spent many hours almost every day for more than three years exploring and guiding within the cave. Once, after being out of the cave for two days due to an illness, he wrote in his journal, "am homesick for the cave". He quickly realized the complex nature of the cave and wrote in his journal, "have given up the idea of finding the end of Wind Cave". He appreciated the beauty and natural features of the cave, but like others of his era, removed samples of cave formations to be sold to visitors. He would only remove samples from the cave in areas where he did not take visitors.

McDonald died of typhoid fever at the age of 20, on December 15, 1893. It is believed he contracted the typhoid in Chicago, where he had been exhibiting samples of the cave at the Columbian Exposition the previous summer. Some people speculate that continued exposure to the cool, damp air of the cave caused him to yield to complications from the typhoid.

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