Idaho Running Day
Oct 17Boise, IDMarathon, Half Marathon +2
Also a half marathon, 1 mi from YMCA Halloween Freaky 5K and Monster Mile, registration open
Half Marathon5K1 miRegistration open
YMCA Halloween Freaky 5K and Monster Mile
Boise, Idaho
- Entry from
- $35
- Days to go
- 18
At a glance
- Date
- Oct 24, 2026
- Location
- Boise, Idaho
- Distances
- Half Marathon, 5K, 1 mi
- Registration
- Registration open until Oct 24, 2026, via runsignup.com
- Official site
- ymcatvidaho.org
- Listed from
- RunSignUp
- Last checked
- Oct 5, 2026
Plan this race for free
Aid stations, cutoffs and pacing in one plan, with the timeline your crew follows. Crew invites and race-day updates come with a Race Pass.
Build my planAbout 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
Courses start and finish in Ann Morison Park
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!
Key dates
Registration opens
Mar 1, 2026
Tier 1 ends
Sep 26, 2026
Tier 2 ends
Oct 19, 2026
Registration closes
Oct 24, 2026
Race day
Oct 24, 2026
Tier 3 ends
Oct 24, 2026
Pricing
Half Marathon
Tier 2, then $80 from Oct 19, 2026
$70
Freaky 5K
Tier 2, then $45 from Oct 19, 2026
$40
Monster Mile
Tier 2, then $40 from Oct 19, 2026
$35
Email me updates about YMCA Halloween Freaky 5K and Monster Mile
Registration openings and major changes, like a new date or a cancellation.
Entry transfers
Can't race, or need an entry? Post it here so nobody has to ask if it's still available.
Similar races
City of Trees Marathon
Oct 11Boise, IDMarathon, Half Marathon +2
Also a half marathon, 1 mi from YMCA Halloween Freaky 5K and Monster Mile, registration open
Boise Half Marathon
Nov 14Boise, IDHalf Marathon
Also a half marathon, 1 mi from YMCA Halloween Freaky 5K and Monster Mile, registration open
Rush Creek Stampede
Oct 10Cambridge, IDHalf Marathon, 10K +1
Also a half marathon, 70 mi from YMCA Halloween Freaky 5K and Monster Mile, registration open
Straight-line distance
More Half Marathons in Idaho
All Half Marathons in IdahoHayden Lake Marathon
Oct 10Hayden Lake, IDMarathon, Half Marathon +2
Rush Creek Stampede
Oct 10Cambridge, IDHalf Marathon, 10K +1
City of Trees Marathon
Oct 11Boise, IDMarathon, Half Marathon +2
Idaho Running Day
Oct 17Boise, IDMarathon, Half Marathon +2
Haunted Half Marathon and 5k by Run the Undergrad
Oct 24Rexburg, IDHalf Marathon, 5K
Halloween Hustle
Oct 25Coeur d'Alene, IDHalf Marathon, 10K +1
Fall Creek Beast
Oct 31Swan Valley, ID50K, Half Marathon
Boise Half Marathon
Nov 14Boise, IDHalf Marathon
Over the Top Trail Race
May 8, 2027Pocatello, ID30K, Half Marathon +2
Races Near Boise
All races near BoiseGreek 5K
Oct 17Boise, ID5K
Toughest Alive GRIT Night — Idaho
Nov 20Meridian, IDBackyard Ultra
Toughest Alive Hourglass - Idaho
Nov 21Meridian, IDRun
River & Rails Donkey Dash
Oct 10Cambridge, ID9 mi, 6 mi +1
Endless Trails Series Registrations
Oct 31McCall, ID
Sasquatch Shuffle
Oct 10McCall, ID50K, 30K +1
Standhope Ultra Challenge
Jul 24, 2027Ketchum, ID100 mi, 60K +1
River of No Return Endurance Runs
Jun 19, 2027Challis, ID108K, 55K +1
Race planning
Plan YMCA Halloween Freaky 5K and Monster Mile with Crewable
Build your aid station plan, organize your crew, and dial in your nutrition strategy. Everything you need to finish strong.
Build my planAre you the race director for YMCA Halloween Freaky 5K and Monster Mile?
Claim this race to manage registration, volunteers, and race day.