BIRR Monster Mash Mile Fun Run

Get ready for a ghoulishly good time at the BIRR Monster Mash Mile Fun Run, returning for its second annual event on Saturday, October 31, 2026, in scenic Hilo, HI! This Halloween-themed fun run invites participants of all ages and abilities to Wailoa State Park in Downtown Hilo. Whether you're aiming for a fast mile or simply enjoying a morning stroll with a festive twist, this event promises a memorable experience on a course ideal for speed and leisure alike. The 1-mile event kicks off at 9:00 AM, with a special 400-yard kids' race for those 12 and under starting at 9:30 AM.

The race course winds through Wailoa State Park, offering a picturesque backdrop for your costumed dash. Typical race day conditions in late October often see comfortable highs around 82°F and lows around 69°F, with a 35% chance of precipitation, making for pleasant running weather. Participants can look forward to provided snacks and water to refuel.

What truly sets the BIRR Monster Mash Mile apart is its vibrant Halloween spirit. Runners are highly encouraged to don their most creative costumes, with awards not just for the top three male and female mile times, but also for the best male and female costumes, and even the top stroller participant. Kids aged 12 and under participate for free and will receive a prize, ensuring everyone leaves with a treat. This community-focused event, co-sponsored with the Hilo Run Club, offers a fantastic way to celebrate Halloween while enjoying the beautiful surroundings of Hilo.