The tune's message is about the exhilaration of exploring the unknown. "The song really asks more questions than it has answers," Kimberly explained to The Boot
. "Sometimes when you're barreling towards your future, you have no idea what it's gonna look like or how you're gonna get there, and it can be a scary thing.
"For us, 'Pioneer' is about the journey from our first album to our second," she added, "everything that we've been thinking about and living out for the past two years. It's about putting one foot in front of the other and about the journey. We did take a literal journey from east Tennessee all the way to the southwest and Malibu to do a long songwriting trip. 'Pioneer' was written on a hilltop in Santa Fe with the skyline in the background, and it was just a beautiful, inspiring moment."