
Spearfish, United States of America · Sunday 17 August 2025
The Leading Ladies' Marathon, held on August 16-17, 2025, in Spearfish, South Dakota, is a unique event that starts at an elevation of 6,000 feet and runs downhill into Spearfish, losing 2,400 feet to a finishing elevation of 3,600 feet. The course offers a fast and scenic route, making it ideal for runners seeking personal bests. With a PR Score of 99.88, it ranks as the 34th fastest marathon in the U.S. and the 2nd fastest in South Dakota.\n\nThe event features a full marathon, half marathon,
Adjusted Time
1:50:22
Time difference: +5.4 minutes compared to a flat, road, temperate course.
Leading Ladies' Marathon & Half Marathon is a half marathon held in Spearfish, United States of America, scheduled for Sunday 17 August 2025. The course is run on road surface with 107m of total elevation gain, reaching a maximum altitude of 1849m above sea level. For registration and full race details, visit the official Leading Ladies' Marathon & Half Marathon website.
With 107m of elevation gain, this is a moderately undulating course. The route ranges from 1118m to 1849m above sea level (731m total range). While not completely flat, the elevation changes are manageable for most runners and shouldn't significantly impact pacing strategy.
Based on historical weather data for August, the expected race day conditions are as follows. Hot conditions are expected, with temperatures between 17°C and 30°C. Heat is one of the biggest performance factors in marathon running — research shows that for every degree above 15°C, marathon times slow by approximately 1-2%. Extra hydration and a conservative start are strongly recommended. There is a low chance of rain (0%), so dry conditions are likely.
Leading Ladies' Marathon & Half Marathon is run on road surfaces, which provide the fastest and most predictable conditions for marathon running. Road courses allow for consistent pacing and are typically the best choice for runners targeting a personal best time.
Our difficulty rating for Leading Ladies' Marathon & Half Marathon is calculated using a model that combines elevation gain, temperature impact, and surface type. Use the difficulty calculator above to enter your target finish time and see exactly how many minutes this course would add or subtract compared to a perfectly flat, cool, road-based half marathon. Faster runners and slower runners are affected differently by the same course conditions, so the difficulty is personalised to your pace.
Looking for an easier marathon or a tougher challenge? You can also compare Leading Ladies' Marathon & Half Marathon against other half marathons to find the right race for your goals.
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