Every upcoming Half Marathon around St. Louis, with start times, entry fees, finish-time stats from past editions, start-line maps, and the local run clubs to train with.
8 upcoming Half Marathon races found · 4 with finish-time stats
Racing a half marathon in St. Louis means you are almost certainly weaving through the city's big park and riverfront DNA. The Forest Park running scene, the Gateway Arch grounds, and the Great Rivers Greenway paths all show up in local training routes, and that same geography - flat stretches giving way to the occasional county-park climb - shapes what race day feels like here.
Fall is when the city leans into it hardest, but the calendar spreads across all four seasons, which matters in a place where August humidity and February cold are both real variables worth planning around. The run clubs around Forest Park and Tower Grove Park keep things social year-round if you want company before committing to a bib.
By the numbers
The Biggest and Longest-Running
The St. Louis races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Jul 27, 2026.
Common Questions About Running a Half Marathon in St. Louis
What does a typical St. Louis half marathon finish time look like - will I be way back in the pack?
Across the 3 RunSignup half marathon editions with published results on RunSesh, walkers and charity entrants included, the median finisher crossed in 2:10:46. The median winner ran 1:10:55 and the last finisher median was 3:30:29, so there is a genuinely wide spread. Fields here tend to be on the smaller side, which usually means a relaxed, non-competitive atmosphere where pace draws very little attention.
What is the cheapest way into a St. Louis half marathon, and does it pay to register early?
Entry fees currently run from $20 to $45. The Great GO! St. Louis Halloween Race is at $20, and most sit at $22. Four of the eight races already have a price increase scheduled, so registering early is a straightforward way to lock in the lower price before the bump hits.
Am I going to get a shirt at these races?
Seven of the eight races say they give a shirt. Every race here has published some giveaway detail, so there are no silent entries to second-guess. On medals, none of the eight have announced one - though that could change as race dates approach.
Which month should I target if I want the most options?
September has the most races, with 2 on the calendar. If you want a specific event, October has two on the same date - The Great GO! St. Louis Halloween Race and Spooky Sprint both fall on October 24, 2026 - so that weekend gives you a choice of formats and price points without any extra training weeks.
Are there run clubs in St. Louis I can train with before race day?
Yes - Achilles St. Louis, Big Hump Hash House Harriers, Big River Racing, Big River Running, BWC Run, Dogtown Running Club, Eureka Run Club, and Forest Park Track Club all operate in the area. The Forest Park and Tower Grove Park corridors are where group runs tend to concentrate, so those clubs are a natural fit if your training routes already pass through those parks.
Are there trail Half Marathon races near St. Louis?
Yes, one race around St. Louis gets you off the pavement: 1 is a trail race. Surfaces are not always published, so it is worth checking a specific race before you register.
