Detroit Free Press Marathon

This edition is listed as Marathon in Detroit, Michigan, USA.

Typical race-morning air at Detroit Free Press Marathon averages 9°C across the last 10 years (about 0°C to 20°C in that window). The morning can still warm as you run. Use that range for planning, not as a promise for race day.

Inside about 14 days, use the live forecast on this page. Further out, use race morning history: it averages 9°C. Treat last year's day as a warning if it was an outlier, not as a forecast.

Heat, humidity, wind or a lumpier day than you hoped all raise the chance of a late fade. If the start feels easy, don't spend it. Back off early, and hold even effort even if that means slower than the A-goal. The preview on this page is the starting point. Full personalised splits sit in Race Pass or Pro.

About 142 m of climbing and 142 m of descent. Rolling. Almost all of it sits within 2%. No steep grades over 6%. Three climbs.

It is an estimate of how the course and conditions could move your baseline. Your body still decides the rest: heat adaptation, fuelling, prep, mindset, how you race, and whether you can draft.

The free page covers conditions, course context and a finish preview. Full personalised pacing and weather-adjusted splits sit in Race Pass or Pro.