Colby Sandbox is a running race on September 5, 2026 in Chico, CO.
From the Organizer
Test event for timing trials
Host City
Nearest Airport
RDD
Redding Municipal Airport · 58 mi
Major Hub
SMF
Sacramento International Airport · 73 mi
Time Zone
Pacific 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 Colby Sandbox, put it on the calendar, and turn “someday” into a start date.
Today
Race day is here
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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 an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
Coming Up
Colby Sandbox
Sep 5, 2026