Eden Marathon
St Austell, United Kingdom · Sunday 18 October 2026
Eden Project Marathon is a challenging multi-terrain event held in Cornwall, UK. First run in 2009, the race features a full marathon and half marathon, with a course that highlights the region's unique landscapes. Runners pass through the 'Cornish Alps,' Luxulyan granite works, and the iconic Eden Project itself. With its well-organized setup and scenic route, this marathon is a must-do for trail enthusiasts seeking a memorable experience.
Difficulty Calculator
h
:m
:s
Adjusted Time
4:34:21
Time difference: +34.3 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain808m
Elevation High204m
Elevation Low5m
Weather Forecast
High16°C
Low13°C
Chance of Rain100%
How hard is Eden Marathon?
Very Difficultharder than 83% of marathons
Flattest / easiestHardest
On our difficulty model, Eden Marathon plays about 30 minutes slower than an average road marathon for a 3:30 runner. It ranks #197 hardest of 1151 marathons we analyse, and #19 of 57 in United Kingdom. Use the calculator above to see the exact adjusted time for your own goal pace.
What will you run at Eden Marathon?
Estimated finish times on this course versus the same effort on an average road marathon, based on its elevation, surface, and expected race-day temperature.
| Average-course time | On Eden Marathon | Difference |
|---|---|---|
| 3:00:00 | 3:16:27 | +16:27 |
| 3:30:00 | 3:54:55 | +24:55 |
| 4:00:00 | 4:34:21 | +34:21 |
| 4:30:00 | 5:14:40 | +44:40 |
| 5:00:00 | 5:55:49 | +55:49 |
| 5:30:00 | 6:37:44 | +1:07:44 |
| 6:00:00 | 7:20:24 | +1:20:24 |
Use the calculator above for your exact goal time. Want a prediction from your own training? Try the marathon time predictor.
Eden Marathon 2026 Course Analysis
Eden Marathon is a full marathon held in St Austell, United Kingdom. It is scheduled for Sunday 18 October 2026. The course is run on road surface with 808m of total climbing, with its high point near 204m above sea level. For registration and full race details, visit the official Eden Marathon website.
Elevation Profile
This is a very challenging course with 808m of total climbing - well above the average road marathon - topping out around 204m above sea level. Hill training is essential, and you should expect a slower finish time than on a flat course.
Expected Race Day Weather
Based on historical weather data for October, the expected race day conditions are as follows. Near-ideal running temperatures are expected, ranging from 13°C to 16°C. This temperature range is widely considered optimal for marathon performance, allowing efficient heat dissipation without cold-related issues. There is a high chance of rain (100%). Runners should prepare for wet conditions, including appropriate footwear and clothing choices.
Surface Type: Road
Eden Marathon is run on road surfaces, which provide the fastest and most predictable conditions for racing. Road courses allow for consistent pacing and are typically the best choice for a personal best.
Looking for an easier marathon or a tougher challenge? You can also compare Eden Marathon against other marathons to find the right race for your goals.
Marathons of similar difficulty
If Eden Marathon fits your goal, these courses play out about the same on our difficulty model.
Other Marathons in United Kingdom
MBNA Chester Marathon
Chester, United Kingdom
Road86m gainOct 2026
Chelmsford Marathon & Half Marathon
Chelmsford, United Kingdom
Road183m gainOct 2026
Abingdon Marathon
Abingdon, United Kingdom
Road85m gainOct 2026
The Yorkshire Marathon
York, United Kingdom
Road188m gainOct 2026
Eryri Marathon
Llanberis, United Kingdom
Road0m gainOct 2026
Endurancelife North York Moors
Ravenscar, United Kingdom
Trail1313m gainOct 2026