Borneo International Marathon
Kota Kinabalu, Malaysia · Sunday 11 May 2025
The Borneo International Marathon takes place in May 2025 in Kota Kinabalu on a flat to gently rolling trail course with minimal elevation change, making it a solid option if you want a fast time without fighting significant climbing. This is a well-established event that's been running since 2008 and operates as a community affair with over 1,000 volunteers supporting the race, so you can expect decent organization and atmosphere. The race sells out regularly, so if you're interested you'll need to register early rather than waiting until closer to the date. The trail surface means you'll want to do some of your training on similar terrain to prepare your legs for the impact and footing differences compared to road running. Weather in Borneo during May will be hot and humid, so expect heat management to be a significant part of your race strategy rather than just fitness.
Difficulty Calculator
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:m
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Adjusted Time
4:34:52
Time difference: +34.9 minutes compared to a flat, road, temperate course.
Course Details
Elevation Gain133m
Elevation High38m
Elevation Low2m
Borneo International Marathon 2025 Course Analysis
Borneo International Marathon is a full marathon held in Kota Kinabalu, Malaysia, scheduled for Sunday 11 May 2025. The course is run on trail surface with 133m of total elevation gain, reaching a maximum altitude of 38m above sea level. For registration and full race details, visit the official Borneo International Marathon website.
Elevation Profile
With 133m of elevation gain, this is a moderately undulating course. The route ranges from 2m to 38m above sea level (36m total range). While not completely flat, the elevation changes are manageable for most runners and shouldn't significantly impact pacing strategy.
Surface Type: Trail
Borneo International 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.
How Difficult Is Borneo International Marathon?
Our difficulty rating for Borneo International 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 Borneo International Marathon against other marathons to find the right race for your goals.