The Mill Race Marathon & Half Marathon 2026 returns to Columbus, Indiana on September 26th. This annual event attracts runners from across the region with its diverse distances including a marathon, half marathon, and 5K run/walk. Race morning in early autumn finds participants gathering at Centennial Park. The park's picturesque setting offers scenic views of mature trees lining the streets, creating a serene atmosphere for racers and spectators alike. As temperatures hover around an average high of 26.8°C with minimal humidity, it promises to be comfortable weather for running. The event has been held annually since its inception in 1990, making it one of Columbus's most cherished traditions. Over the years, thousands have participated, contributing significantly to local charities and scholarships supporting young athletes from high schools and below through their Student 5K race specifically designed for them. The course winds through bustling neighborhoods like Downtown Columbus before turning onto Centennial Park, where the finish line is located. The marathon route takes runners on a challenging but rewarding journey with its hard and dry surface, ensuring fast times while maintaining safety. Notable features include several water stations strategically placed to aid participants throughout their run. Starting at 7:00 AM sharp, the race offers breathtaking views of the city as runners complete either 42K for marathoners or half that distance in a half-marathon. A 5K walk/run is also available for all ages and fitness levels. The weather on race day will feel comfortable with temperatures ranging from 15.4°C to 26.8°C, mild winds of about 8 kilometers per hour, and only slight rainfall expected.
5K Run/Walk 5K • Start: 07:30:00 • Fee: $31.95
Half Marathon 21K • Start: 07:30:00 • Fee: $79.88
Marathon 42K • Start: 07:30:00 • Fee: $90.53
Student 5K (High School or younger) 5K • Start: 07:30:00 • Fee: $12.78
Registration can be done online at https://raceroster.com/events/2026/118934/mill-race-marathon-and-half-marathon-2026. The cost is $31.95 for the 5K, which includes a guaranteed shirt size through September 17th; after that date, sizes are first come-first served. Half marathon and marathon registrations each cost $79.88 and $90.53 respectively. Bibs will be available for pickup on race day from 6:00 AM to 7:45 AM at the same location as the start of the event. Participants should bring a photo ID, proof of age if under 18, and any necessary medications or personal items they might need during the run. The start line is located in Centennial Park on West Main Street near the intersection with Jefferson Avenue. The race requires participants to be at least 13 years old; anyone younger must have a guardian present for registration and participation. This event matters because it not only showcases Columbus, Indiana's vibrant community spirit but also supports local youth through scholarships and charity efforts. Whether you're a seasoned runner or simply looking for an engaging morning activity in beautiful surroundings, the Mill Race Marathon & Half Marathon 2026 is worth your time.
Races Offered
5K Run/Walk
Sep 26, 2026
straighten
Distance —
5K
terrain
Type —
Running
timer
07:30
sell
$31.95
Half Marathon
Sep 26, 2026
straighten
Distance —
21K
terrain
Type —
Running
timer
07:30
sell
$79.88
Marathon
Sep 26, 2026
straighten
Distance —
42K
terrain
Type —
Running
timer
07:30
sell
$90.53
Student 5K (High School or younger)
Sep 26, 2026
straighten
Distance —
5K
terrain
Type —
Running
timer
07:30
sell
$12.78
Weather History
These values represent the 3-year monthly averages for September in Columbus.
thermostatTemperature
15.4° / 26.8°
wb_sunnyFeels like
15.0° / 26.4°
light_mode
Avg sunshine hours
10h 31m
water_drop
Avg rainfall
2.0 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
8.0 km/h (Light breeze)
opacity
Sweat loss rate
High
terrain
Course conditions
Hard and dry surface
sunny
Max UV Index
Moderate (5.0)
humidity_mid
Humidity
67.9%
wb_twilight
Sunrise
07:25
nightlight
Sunset
19:50
About Columbus
Learn more about the host city, Columbus.
Columbus is a city in Southern Indiana and the seat of Bartholomew county.
