Single Track Spirits in Cody, Wyoming, takes the term “microdistillery” to a new level. That word gets thrown around a lot in today’s whiskey landscape, with countless small (and large) businesses eager to cash in on consumers’ mania for small-batch and artisanal everything­—and all too often, it gets slapped on bottles of mass-produced MGP juice and bottled by a purveyor more interested in branding than distilling.

Not so with Single Track; this is literally a one-man operation out of a barn. Distiller Tom Pettinger, a radiologist by trade, learned distilling while living in Switzerland and Ireland, and spent years…