
From the Organizer
From the base of Table Mountain and Colorado's spectacular foothills, All-Out Multicourse presents our 15th annual Kooky-Spooky from Jefferson County's NAAC Stadium… easily accessible from several nearby highways. Along with its Endless Series sidekick in March, Spring Fever, these 5K, 10K & Half Marathon courses will hug the shores of Arvada's Blunn Reservoir via the Ralston Creek Trail and will challenge the beginner and veteran athlete alike! Of course, we'll still be celebrating the Halloween spirit so re-use your Halloween costume for our official costume contest. And especially revel in the extra hour of sleep you get as Nov. 1 is the end of daylight savings time!
Events
Weather
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
57°
Typical Low
32°
Chance of Rain
16%
Based on US Climate Normals data from Lakewood, 6 mi from the venue.
Host City
Elevation
7,216 ft
Nearest Airport
BJC
Rocky Mountain Metropolitan Airport · 15 mi
Major Hub
DEN
Denver International Airport · 31 mi
Time Zone
Mountain Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at All-Out Kooky-Spooky, put it on the calendar, and turn “someday” into a start date.
Coming Up
All-Out Summer Breeze
10 miles away
The Triple Bypass
9 miles away
Spirit of the West 5K Run/Walk
Less than a mile away
All-Out Runapalooza
10 miles away
From Endurance Grid
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.
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)
All-Out Kooky-Spooky
Nov 1, 2026