Grand Rapids 5K
Race Day Weather
Cool start — fast day potential, warming through the race
A cool 45°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 58°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 67% is worth noting for effort level, especially in later miles.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Grand Rapids 5K
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized Grand Rapids 5K race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
Race Info
The Run Thru The Rapids 5K is held on the Sunday of Grand Rapids Marathon weekend and starts and finishes by the David D. Hunting YMCA. It is a flat out-and-back on Seward Avenue Northwest, running north along the west side of the Grand River to a turnaround just south of Leonard Street and returning to the finish on Fulton Street.
