BOSTON - America's marquee marathon is ready for its close-up.

The first feature-length documentary film about the 120-year-old Boston Marathon is in the works. Its creators say "Boston" will go well beyond the 2013 bombings to retrace the iconic footrace's first steps in 1897.

Two feature films (one starring Mark Wahlberg), a stage play and an HBO special also are in production. But those projects are all about the 2013 finish line attacks that killed three spectators and wounded more than 260 others.

The makers of "Boston" say it won't ignore the dark events of 2013, but will focus more on how the city and its namesake race bounced back.

Producer Megan Williams, an Oscar-nominated filmmaker, says the documentary tentatively is set to premiere in April 2017.