In 17 days · Sat, Oct 24, 2026
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Saturday, October 24th, 2026
Ann Morrison Park, 1000 S Americana Blvd, Boise ID
Half · 1 Mile · 5K
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
Get ready for a frightfully fun time at the YMCA Halloween Run!
Choose between the Half Marathon, Freaky 5K, or Monster Mile and show off your spookiest costume. This event is packed with festive energy, music, and plenty of great Halloween fun along the way.
Stay after for the Micron Trunk or Treat
Start Times:
Half Marathon - 9:00am
Monster Mile – 9:45 am
Freaky 5K – 10:00am
Courses start and finish in Ann Morrison Park near the Old Timer's Shelter
Wear your costumes, neon, or fluorescent clothing, glowsticks, lights, and more...have fun and be creative!
We'll have a pre-race costume contest with prizes for the winners!
Course map
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