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START 5K & 10K

START 5K & 10K is a running race on August 15 – October 24, 2026 in Saint Louis, MO.

Date
August 15 – October 24, 2026 (16 days to go)
Sport
Running
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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

START 5K
START 10K

Weather

Typical Conditions

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.

Sunrise 6:16 AMSunset 7:56 PMDaylight 13h 40m

Host City

About Saint Louis, MO

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

What Are You
Waiting For?

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

Race
START 5K & 10K
Date
August 15 – October 24, 2026

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From Endurance Grid

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.

Read the Guide

Running

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.

Plan your trip

Make it a Racecation

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 Louis
Lodging
Flights
Rental Car
Activities

Frequently Asked Questions (FAQs)

What is the START 5K & 10K?+
START 5K & 10K is a running race held in Saint Louis, Missouri on August 15, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
When and where is the START 5K & 10K?+
Saturday, August 15, 2026 in Saint Louis, Missouri at Big River Running. Check the event page for exact start times and wave schedules.
How do I register for the START 5K & 10K?+
Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.

START 5K & 10K

Aug 15, 2026

Register →