From the Organizer
The 26th Annual Atomic Days Blast Off Fun Run is a community celebration event held in Arco, Idaho to kick off the Atomic Days festivities. It’s designed for all ages and fitness levels, offering a fun, family-friendly atmosphere with multiple race options.
Events
Race Location
About This Sport
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.
Coming Up
Saint Alphonsus Capitol Classic Kids Run
Boise Marathon
Christmas 5K/10K/Half Marathon in July - Idaho Falls
Great Futures 5K & 10K
Frequently Asked Questions (FAQs)
26th Atomic Days Blast Off Fun Run
Jul 18, 2026