
START 5K & 10K is a running race on August 15 – October 24, 2026 in Saint Louis, MO.
From the Organizer
START is a FREE, welcoming 5K and 10K training program for beginning to novice runners.
START 5K is geared for people new to running or getting back into the routine after some time off, looking for a structured, fun and friendly entry into fitness. The program starts slowly, gradually working our way to the goal of continuously running a 5k. Along the way you’ll learn important information on injury prevention, nutrition, stretching, proper running form, and many other topics. There is no pressure here, just positive support to help you achieve your goals! For more information visit https://www.bigriverrunning.com/run/start-5k/
START 10k is for beginning to novice runners. This program is geared for people who have previously run a 5k and would like to try a new distance or anyone who has taken some time off running and is seeking motivation and accountability! It is a great option for runners who have graduated from Big River’s START 5k program. We recommend being able to move (run/walk) continuously for 45 minutes at the start of the program, and being capable of completing a 5K in under 45 minutes. Additional program information can be found at https://www.bigriverrunning.com/run/start-10k/
Both the 5K and 10K training plan will be shared with registered participants. And the 5K and 10K groups will both train at the same locations on Wednesdays and Saturdays. So if you're undecided about which distance to train for, you can switch between 5K and 10K mid-season.
*We recommend that START 10K participants be able to complete a 5K in under 45 minutes. If you'd like to get faster at the 5K distance, then START 5K might be a better choice.
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
88°
Typical Low
68°
Chance of Rain
23%
Based on US Climate Normals data from St Charles 7 Ssw, 6 mi from the venue.
Host City
Population
293,109
as of 2023
City Elevation
471 ft
Nearest Airport
STL
St. Louis Lambert International Airport · 9 mi
Time Zone
Central Time
From Endurance Grid
A big city race. Expect multiple lodging options and plenty to do the day before.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at START 5K & 10K, put it on the calendar, and turn “someday” into a start date.
16
Days to train
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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
Big River Training Team
4 miles away
Ballwin Days 5K and 1 Mile Family Fun Run
Less than a mile away
Moonlight Howl 5K Run/Walk
Less than a mile away
The SKIPPO Trail Race
3 miles away
Plan your trip
Coming from out of town? There's more to Saint Louis than race day. We'll help you line up nearby lodging, flights, a rental car, and things to do so you can make the most of your racecation.
Plan your trip to Saint LouisFrequently Asked Questions (FAQs)
START 5K & 10K
Aug 15, 2026