In 17 days · Sat, Oct 24, 2026
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Saturday, October 24th, 2026
Ann Morrison Park, 1000 S Americana Blvd, Boise ID
5K · 1 Mile
40–60°F · low rain risk
See last 10 years
On this date: rain 2 of the last 10 years
2025
39–69°F
dry
2024
32–51°F
dry
2023
40–63°F
dry
2022
31–48°F
dry
2021
47–54°F
rain
2020
36–52°F
dry
2019
31–56°F
dry
2018
47–67°F
dry
2017
39–61°F
dry
2016
54–64°F
rain
Best months to race in Idaho →
Race-day forecast says layers
40°F at the start.
Gloves, ear warmers, throwaway layers, hand warmers — delivered before race day.
About this race
YMCA Halloween Run presented by Micron
Ready, Set, Glow! Trick Out Your Costume and Treat Yourself To A Fun Run! Choose from either the Monster Mile or Freaky 5k.
Event Details
- Date: 2026-10-24
- Location: Ann Morrison Park, 1000 S Americana Blvd, Boise, ID
- URL: Sign Up Here
Course Information
- Start/Finish: Ann Morrison Park
- Race Options: Choose between the Monster Mile or Freaky 5k
Costume Fun
- Dress Code: Wear your costumes, neon, or fluorescent clothing, glowsticks, lights, and more!
- Contest: We’ll have a pre-race costume contest with prizes for the winners!
- Creativity: Have fun and be creative!
Course map
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