
Waitsfield, United States of America · Sunday 12 July 2026
The Mad Marathon is an annual marathon event held in the Mad River Valley of Central Vermont, first established in 2011. It consistently attracts participants from all 50 U.S. states, various territories, and over 34 countries, reflecting its international appeal and community focus. The event includes a full marathon, half marathon (Mad Half), team relays, and, more recently, 5K and 10K races to accommodate families and runners of varying abilities.\n\nThe route is noted for its scenic and chal
Adjusted Time
5:04:52
Time difference: +64.9 minutes compared to a flat, road, temperate course.
Mad Marathon is a full marathon held in Waitsfield, United States of America, scheduled for Sunday 12 July 2026. The course is run on trail surface with 650m of total elevation gain, reaching a maximum altitude of 461m above sea level. For registration and full race details, visit the official Mad Marathon website.
This is a very challenging course with 650m of total elevation gain — significantly more than the average trail marathon. The route ranges from 195m to 461m above sea level (266m range). Hill training is essential, and runners should expect a significantly slower time compared to a flat course.
Based on historical weather data for July, the expected race day conditions are as follows. Moderate temperatures between 17°C and 27°C are expected. While comfortable for most runners, those targeting fast times should pay attention to hydration, as these temperatures can impact performance over the full distance. There is a low chance of rain (0%), so dry conditions are likely.
Mad Marathon is a trail race, meaning the course includes unpaved surfaces such as dirt, gravel, or forest paths. Trail surfaces are inherently slower than road courses due to uneven footing, technical sections, and often steeper gradients. Trail-specific shoes with good grip are recommended, and runners should expect a finish time 10-20% slower than their equivalent road marathon time.
Our difficulty rating for Mad 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 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 Mad Marathon against other marathons to find the right race for your goals.
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