Fox Valley Marathon
St. Charles, United States of America · Sunday 20 September 2026
Fox Valley Marathon, held on September 21, 2025, in St. Charles, Illinois, is a flat and fast event that takes runners through the scenic towns along the Fox River. The course includes towns, bridges, waterfalls, parks, river paths, and even an authentic Dutch windmill, providing a mix of urban charm and natural beauty. With its well-shaded route, runners can enjoy a cooler environment during the race.\n\nThe event features multiple distances, including a full marathon, half marathon, 5K, and Fa
Difficulty Calculator
h
:m
:s
Adjusted Time
4:06:34
Time difference: +6.6 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain0m
Elevation High223m
Elevation Low192m
Weather Forecast
High32°C
Low18°C
Chance of Rain60%
Other Marathons in United States of America
Yuengling Shamrock Marathon
Virginia Beach, United States of America
Road82m gainMar 2025
Charlottesville Marathon
Charlottesville, United States of America
Road0m gainApr 2025
Martian Invasion of Races
Dearborn, United States of America
Road119m gainApr 2025
Hogeye Marathon
Springdale, United States of America
Road200m gainApr 2025
Eisenhower Marathon
Abilene, United States of America
Road133m gainApr 2025