BIRR Monster Mash Mile Fun Run | Fun Run Atlas | RMN
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Monday, October 5, 2026 · New Jersey

Monday, October 5, 2026 · New Jersey

BIRR Monster Mash Mile Fun Run

A Halloween-morning costumed mile in downtown Hilo's Wailoa State Park, with prizes for best costume and best stroller.

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Fun Run Atlas · Hawaii

Holiday and seasonal · Hilo, HI

BIRR Monster Mash Mile Fun Run is a holiday fun run in Hilo, Hawaii, with a verified date of October 31, 2026.

ConfirmedFamily friendlyCostumes encouraged
When
Sat, Oct 31, 2026
Start 9:00 a.m.
Halloween
Where
Wailoa State Park, Pavilion 2
Hilo, HI 96720 · Hawaii County
Directions
Entry
Free for BIRR members and kids 12 and under; $10 donation for non-members
Register
Organized by
Big Island Road Runners (with Hilo Run Club)
Second annual in 2026
Official siteDirectionsAdd to calendar

What to expect

  • costumes encouraged
  • best costume award
  • stroller division
  • kids 400-yard dash
  • free for members

2026 Confirmed

Saturday, October 31, 2026

  • Sat, Oct 31, 2026

Checked Sun, Oct 4, 2026 against the official source.

2027 Projected

Projected from the 2026 pattern (every October 31); not announced.

  • Sun, Oct 31, 2027

About the run

A 1-mile race and a 400-yard kids' dash from Pavilion 2 at Wailoa State Park, co-hosted with Hilo Run Club. Snacks provided; free for BIRR members and kids.

The run

Distances
1 mile, 400-yard kids race
Occasion
Halloween
Season
Fall

Nearby

Sources

Details checked against the race’s own pages on Sun, Oct 4, 2026.