Kalyn Heffernan is tireless. She's performed inside prisons, on Native American reservations and in community centers, rapping about gentrification, police brutality and disability rights. As if that weren't enough, the MC is now running in a heated mayoral race and forcing politicians to talk about many of the issues she's spent years writing songs about. She's foul-mouthed, tough as nails and, most of all, a champion of up-and-coming musicians, including those she mentors at the music education nonprofit Youth on Record. Heffernan and her band, Wheelchair Sports Camp, represent the best of Denver's music scene: They're creative, optimistic, boldly original, and they engage with their community.