
Windsor, United Kingdom · Saturday 16 May 2026
The Windsor Half Marathon is a scenic race set in the royal town of Windsor, home to Windsor Castle, one of the official residences of the British monarch. The course offers runners a unique opportunity to race through the Royal Parks, past historic landmarks, and along the River Thames. Starting near the Windsor Great Park, runners enjoy stunning views of the castle and the surrounding countryside. The course is relatively flat, with a few gentle inclines, making it accessible for participants
Adjusted Time
1:48:12
Time difference: +3.2 minutes compared to a flat, road, temperate course.
Windsor Half Marathon is a half marathon held in Windsor, United Kingdom, scheduled for Saturday 16 May 2026. The course is run on road surface with 208m of total elevation gain, reaching a maximum altitude of 88m above sea level. For registration and full race details, visit the official Windsor Half Marathon website.
With 208m of elevation gain, this is a moderately undulating course. The route ranges from 24m to 88m above sea level (64m 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 May, the expected race day conditions are as follows. Moderate temperatures between 12°C and 29°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 moderate chance of rain (26%). Runners may want to prepare for wet conditions but shouldn't expect persistent rainfall.
Windsor 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 Windsor 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 Windsor Half Marathon against other half marathons to find the right race for your goals.
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