Nordmarka Skogsmaraton Halv

Nordmarka Skogsmaraton Halv 2025 Course Analysis

Nordmarka Skogsmaraton Halv is a full marathon held in Oslo, Norway, scheduled for Saturday 21 June 2025. The course is run on trail surface with 421m of total elevation gain, reaching a maximum altitude of 411m above sea level. For registration and full race details, visit the official Nordmarka Skogsmaraton Halv website.

Elevation Profile

This is a hilly course with 421m of total elevation gain. The route climbs from 175m to as high as 411m above sea level — a substantial 236m elevation range. Runners should train on hills and plan for a more conservative pacing strategy, especially on the climbs.

Expected Race Day Weather

Based on historical weather data for June, the expected race day conditions are as follows. Moderate temperatures between 15°C and 26°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.

Surface Type: Trail

Nordmarka Skogsmaraton Halv 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 Nordmarka Skogsmaraton Halv?

Our difficulty rating for Nordmarka Skogsmaraton Halv 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 Nordmarka Skogsmaraton Halv against other marathons to find the right race for your goals.