Missoula, Montana’s Lil Smokies burn through revved-up bluegrass with abundant energy. Acoustic instrumentation—including upright bass, Dobro, banjo, and fiddle—ties the quintet to Appalachian roots, while their electrifying intensity and contemporary storytelling pushes them into progressive bluegrass territory. On 2017’s Changing Shades, the Smokies’ vivid vocal harmonies duel with perspicacious picking. Fiddler Jake Simpson patterns his breaks on rock guitar solos, and songs like “Ms. Marie” chug along with country-rock flair. Michigan Rattlers open.