- From Boston, Massachusetts.
- Formed in 2014 by Evan Murphy (guitar), Bronwyn Keith-Hynes (fiddle), Nate Sabat (bass), BB Bowness (banjo) and David Benedict (mandolin).
- Their name comes from a 12-mile marker that the band passes on the highway at the city limits of Boston. “It has become a signpost for our musical adventures when we’re leaving town or coming home.”
- Murphy is the only Boston native (from Milton, Massachusetts).
- 2017, released their first album Onward (no label). produced by Stephen Mougin.
- 2017, won the IBMA’s Momentum Award for Band of the Year.
- 2019, released City on a Hill album (Delores the Taurus), produced by Bryan Sutton.
- 2019, banjo player and native New Zealander BB Bowness became a naturalized citizen of the United States.
- 2020, won the IBMA Award for New Artist of the Year.
- 2021, fiddler Keith-Hynes won the IBMA Award for Fiddle Player of the Year.
- 2021, Benedict and Keith-Hynes left the band and were replaced by Ella Jordan (fiddle) and Korey Brodsky (mandolin).
- 2024, released Instant Lonesome and the Twinkle Brigade album (Don Giovanni) with singer/songwriter Jody Stecher.