Concrete and Grass Lowertown Music Festival returns to Mears Park for three days of music, rain or shine. Celebrating the diversity in people’s musical tastes, this free festival includes a range of genres including jazz, opera, chamber music, rock, dance, roots, and world music. Headlining the festival this year are Halloween Alaska and Lucy Michele. For the full lineup, visit www.concreteandgrass.com. Food, wine, and beer from restaurants in the Lowertown Entertainment District will be available in the park all weekend.