Perseløpet 10K - Pollen and Air Quality Forecast for Today

Perseløpet 10K is held on a flat, fast, AIMS-certified loop course in the residential neighbourhood around Ås school in Eidsvoll, Norway. Runners complete multiple laps of a roughly 2.6-kilometer circuit, mostly along pedestrian and cycle paths with a short stretch on quiet residential road, and with virtually no elevation change throughout. This closed, traffic-free layout makes it a popular choice for runners chasing a personal best. Perseløpet is run as part of a broader race series that also offers 3K, 5K, half marathon and marathon distances across multiple dates throughout the year, making it a flexible option for runners at every level.

Because Perseløpet is held at different times of year — from early summer through autumn — the conditions along the 2.6-kilometer loop shift with the seasons. In spring and early summer, tree and grass pollen tend to be the main factor as the course winds through park paths and open nature areas around Ås skole. Later in summer, grass pollen typically takes over as the dominant allergen. By autumn, pollen levels generally ease off, though weeds and mould can still linger in the greener stretches. Since the route runs mostly through park, nature fields and quiet residential neighbourhoods rather than heavy urban streets, traffic pollution plays a smaller role here than on typical city-centre courses — vegetation and seasonal pollen are usually the bigger factor to plan around. Because air quality and pollen levels change from day to day, the Airmine forecast along the route updates continuously and can be followed in the days leading up to your race, so you always know what to expect before you toe the start line. Push limits, not lungs!