2027 Greater St. Louis Marathon - Apr 10 Countdown

Q: When is the 2027 Greater St. Louis Marathon and what time does it start?

The Greater St. Louis Marathon is held on a Saturday in April, though the exact weekend has moved in recent years (April 27 in 2024, April 26 in 2025, April 11 in 2026). The 2027 edition is expected around early-to-mid April 2027, but the official date has not yet been posted — confirm it on the official GO! St. Louis site. The full marathon starts at 7:00 a.m. Central Time downtown, with an optional 6:00 a.m. early start for slower walkers.

Q: Where does the Greater St. Louis Marathon course go?

It is a city tour that starts and finishes downtown near the Gateway Arch. A signature early stretch crosses the Mississippi River into East St. Louis, Illinois and returns over the city's historic bridges, before the course winds through the historic Soulard neighborhood, the Central West End, Tower Grove Park and the Missouri Botanical Garden out to Forest Park — home of the 1904 World's Fair and Olympics — in the later miles. The route has been reworked in recent years, so check the official course map for the current 2027 layout.

Q: Is the Greater St. Louis Marathon course flat or hilly?

It is best described as rolling hills, not flat. The course has about +300 m (984 ft) of total climbing with nearly equal descent, so there is no single big hill but a steady series of undulations through the city and Forest Park. It is a scenic, history-rich course rather than a dead-flat PR track — run the early downhill sections sensibly and save energy for the rolling back half.

Q: Is the Greater St. Louis Marathon a Boston qualifier?

Yes. The course is USATF-certified and a Boston-qualifying race, so a qualifying time here counts toward Boston Marathon entry. Because it rolls rather than runs flat, it is a solid BQ attempt for runners who handle undulating terrain well, but it is not an aggressive net-downhill course. Check your target on the Boston qualifying calculator.

Q: What is the time limit for the Greater St. Louis Marathon?

The full marathon has a 6.5-hour course time limit from the 7:00 a.m. start. Runners and walkers who expect to finish in roughly 6 to 7.5 hours can use the optional 6:00 a.m. early start, which effectively extends their time on course. That works out to about a 14:54 per mile (9:15 per km) pace to make the standard cutoff.

Q: How do I register for the Greater St. Louis Marathon?

Registration is handled online through RunSignup via the GO! St. Louis race page; there is no lottery — entry is first-come, first-served until distances sell out (the half marathon has sold out in recent years). Prices rise as race day approaches, so registering early saves money. The marathon, half marathon, 10K, 5K and 1-mile family fun run are all part of the same weekend.

Q: How big is the Greater St. Louis Marathon?

It is a mid-sized regional marathon. The full marathon drew about 1,400 finishers in 2026, while the full race weekend — marathon, half, 10K, 5K and fun run combined — brings around 10,000 participants downtown. Expect supportive crowds at the start, finish and through neighborhoods like Soulard, with quieter stretches on the out-and-back middle miles.

Q: Wasn't this called the GO! St. Louis Marathon?

Yes — the race was long known as the GO! St. Louis Marathon and was rebranded the Greater St. Louis Marathon when the route was redesigned to span more of the region. It is still organized by the same nonprofit, GO! St. Louis, which has run St. Louis fitness events for over two decades. Older results and reviews under the GO! St. Louis name refer to the same event.

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Race Information

Race	2027 Greater St. Louis Marathon - Apr 10
City	St. Louis
Date	2027-04-10 at 07:00
Field Size	~1,409 runners
Time Limit	6 hours 30 min
Cutoff pace	9:15/km
Timezone	America/Chicago
Official Site	GO! St. Louis
Registration	Register

Race Day Weather

Average Temperature	12.3°C / 54°F
Humidity	74%
Wind	23.2 km/h
Rain Chance	34%
Typical Conditions	Cool, often-fresh early-April St. Louis morning — spring temperatures around 48 degrees F (9 degrees C) at the 7:00 a.m. start, warming through the morning

What to Prepare: An April morning in St. Louis usually starts cool, around 48 degrees F (9 degrees C), and warms quickly once the sun is up — comfortable racing weather, but spring brings a real chance of rain or a gusty front off the Mississippi. Throwaway gloves and a long-sleeve you can shed early are smart, and check the forecast the week before for a rain layer.

Based on historical averages for race week. Use our Weather Score Calculator and What to Wear Guide for personalized advice.

Wind Impact on Race Day

Wind at 23.2 km/h can affect your marathon pace by 5-15 seconds per kilometer. Headwinds slow you down exponentially — a 20 km/h wind costs more than twice a 10 km/h wind.

Calculate your wind-adjusted pace →

Race-Week Climate

Based on 20 years of race-week weather (2005-2024), MERRA-2 reanalysis

	Cooler	Typical	Warmer
Temperature	5.1°C	12.3°C	19.2°C
Dew point	0.3°C	7.5°C	16.1°C

Wet-day chance: 34% Runnability: 71/100

Data: NASA POWER (MERRA-2 reanalysis), NASA Langley Research Center

Course Profile

Course Type	City tour
Elevation Gain	300m
Terrain	Road (paved downtown and park streets, rolling hills)
Profile	A genuine city tour rather than a flat time-trial. The race starts on Market Street downtown and finishes a few blocks away on Chestnut Street, near the Gateway Arch. Its signature stretch comes early, when runners cross the Mississippi River into East St. Louis, Illinois and return over the city's historic bridges — so you briefly run in two states. From there the redesigned course threads recognizable St. Louis sights — the historic Soulard neighborhood, the Central West End, Tower Grove Park and the Missouri Botanical Garden — before reaching Forest Park, the 1,300-acre home of the 1904 World's Fair and Olympic Games, in the later miles. It is a rolling-hills course (about +300 m / 984 ft of gain, with nearly equal loss) on paved city streets, and the route has been reworked in recent years, so confirm the current course map. It is USATF-certified and a Boston qualifier, but the rolling terrain and a relatively small full-marathon field make it more of a scenic, history-rich race than a flat PR machine — plan for the undulations rather than expecting Berlin-flat splits.
Boston Qualifier	Yes — Check your BQ time

Prepare for 2027 Greater St. Louis Marathon - Apr 10

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Featured In

Most Scenic Marathon Courses in the World (2026) Best Marathons for Spectators & Family Support in 2026 Best Marathons with Historic Routes & Heritage in 2026 Best US Marathons 2026

Frequently Asked Questions

When is the 2027 Greater St. Louis Marathon and what time does it start?

The Greater St. Louis Marathon is held on a Saturday in April, though the exact weekend has moved in recent years (April 27 in 2024, April 26 in 2025, April 11 in 2026). The 2027 edition is expected around early-to-mid April 2027, but the official date has not yet been posted — confirm it on the official GO! St. Louis site. The full marathon starts at 7:00 a.m. Central Time downtown, with an optional 6:00 a.m. early start for slower walkers.

Where does the Greater St. Louis Marathon course go?

It is a city tour that starts and finishes downtown near the Gateway Arch. A signature early stretch crosses the Mississippi River into East St. Louis, Illinois and returns over the city's historic bridges, before the course winds through the historic Soulard neighborhood, the Central West End, Tower Grove Park and the Missouri Botanical Garden out to Forest Park — home of the 1904 World's Fair and Olympics — in the later miles. The route has been reworked in recent years, so check the official course map for the current 2027 layout.

Is the Greater St. Louis Marathon course flat or hilly?

It is best described as rolling hills, not flat. The course has about +300 m (984 ft) of total climbing with nearly equal descent, so there is no single big hill but a steady series of undulations through the city and Forest Park. It is a scenic, history-rich course rather than a dead-flat PR track — run the early downhill sections sensibly and save energy for the rolling back half.

Is the Greater St. Louis Marathon a Boston qualifier?

Yes. The course is USATF-certified and a Boston-qualifying race, so a qualifying time here counts toward Boston Marathon entry. Because it rolls rather than runs flat, it is a solid BQ attempt for runners who handle undulating terrain well, but it is not an aggressive net-downhill course. Check your target on the Boston qualifying calculator.

What is the time limit for the Greater St. Louis Marathon?

The full marathon has a 6.5-hour course time limit from the 7:00 a.m. start. Runners and walkers who expect to finish in roughly 6 to 7.5 hours can use the optional 6:00 a.m. early start, which effectively extends their time on course. That works out to about a 14:54 per mile (9:15 per km) pace to make the standard cutoff.

How do I register for the Greater St. Louis Marathon?

Registration is handled online through RunSignup via the GO! St. Louis race page; there is no lottery — entry is first-come, first-served until distances sell out (the half marathon has sold out in recent years). Prices rise as race day approaches, so registering early saves money. The marathon, half marathon, 10K, 5K and 1-mile family fun run are all part of the same weekend.

How big is the Greater St. Louis Marathon?

It is a mid-sized regional marathon. The full marathon drew about 1,400 finishers in 2026, while the full race weekend — marathon, half, 10K, 5K and fun run combined — brings around 10,000 participants downtown. Expect supportive crowds at the start, finish and through neighborhoods like Soulard, with quieter stretches on the out-and-back middle miles.

Wasn't this called the GO! St. Louis Marathon?

Yes — the race was long known as the GO! St. Louis Marathon and was rebranded the Greater St. Louis Marathon when the route was redesigned to span more of the region. It is still organized by the same nonprofit, GO! St. Louis, which has run St. Louis fitness events for over two decades. Older results and reviews under the GO! St. Louis name refer to the same event.