In 21 days · Sat, Oct 31, 2026
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Saturday, October 31st, 2026
Wailoa State Park, Hilo HI
1 Mile
69–79°F · rain likely
See last 10 years
On this date: rain 4 of the last 10 years
2025
67–79°F
rain
2024
69–75°F
rain
2023
71–81°F
dry
2022
70–79°F
rain
2021
69–78°F
dry
2020
72–82°F
dry
2019
71–81°F
dry
2018
69–83°F
dry
2017
71–82°F
dry
2016
68–74°F
rain
Best months to race in Hawaii →
Rain hits this date most years
It might pour. Race anyway.
Ponchos, brimmed hats, anti-chafe, dry bags — the wet-race kit, delivered fast.
About this race
Come Join us for the second Annual Monster Mash Mile Fun Run . Looking to test your speed or just enjoy a morning stroll. Then come join us for our Monster Mash Mile in Downtown Hilo at Wailoa State Park. *** Wear your best costume in celebration of Halloween:)
*Date: October 31, 2026 with a 9:00 am start for the 1 mile event and 9:30 am start for the kid’s shorter distance race.
**Location: Wailoa State Park in Downtown Hilo, Pavilion 2.
***Awards: top 3 male and female mile times. Top 1 of Best Costume male and female. Top 1 of stroller male and female. All kids will receive a prize for the kids race.
****Fees: Free for BIRR members and kids12 years and under (fee will drop off in the registration) / $10 donation for non-members.
***Note the "kids" race for those 12 and under will be a 400 yard event:)
** Snacks and water provided.
* Co-Sponsored with Hilo Run Club
Course map
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