BIRR Monster Mash Mile Fun Run
- Date
- October 31, 2026
- Location
- Wailoa State Park, Hilo, HI
- Distance
- BIRR Monster Mash Mile Fun Run · BIRR Monster Mash Fun Run - 12 years and under.
From the Organizer
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
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
81°
Typical Low
68°
Chance of Rain
78%
Based on US Climate Normals data from Hilo Intl Ap, 3 mi from the venue.
Host City
About Hilo, HI
Elevation
149 ft
Nearest Airport
ITO
Hilo International Airport · 3 mi
Major Hub
KOA
Ellison Onizuka Kona International Airport at Keāhole · 62 mi
Time Zone
Hawaii-Aleutian Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at BIRR Monster Mash Mile Fun Run, put it on the calendar, and turn “someday” into a start date.
145
Days to train
- Race
- BIRR Monster Mash Mile Fun Run
- Date
- October 31, 2026
- Location
- Wailoa State Park, Hilo, HI
Coming Up
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5K
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Volcano's ʻŌhiʻa Lehua Run
18 miles away
Big Island International Marathon 2027
Marathon
Less than a mile away
From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
Running
From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Frequently Asked Questions (FAQs)
- What is the BIRR Monster Mash Mile Fun Run?
- BIRR Monster Mash Mile Fun Run is a running race held in Hilo, Hawaii on October 31, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the BIRR Monster Mash Mile Fun Run?
- Saturday, October 31, 2026 in Hilo, Hawaii at Wailoa State Park, Hilo, HI. Check the event page for exact start times and wave schedules.
- How do I register for the BIRR Monster Mash Mile Fun Run?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
BIRR Monster Mash Mile Fun Run
Oct 31, 2026