Immerse yourself in the rugged beauty of Oslo as you prepare for the Oslo Trail Challenge, set to take place from September 25-27, 2026. Registration opens on April 1, 2026, and remains open until September 1, with spots available on a first-come-first-served basis. The event offers four distinct distances: the grueling 200km trek, an ambitious 100km route, a scenic 55km journey, and a more manageable but still challenging 21km course. All races start and finish at Lillomarka Arena in Oslo, providing runners with easy access to amenities before they set off into the trails. Participants must navigate their way through the natural terrain without marked routes; GPS tracks or paper maps are essential tools for staying on track. The event emphasizes self-reliance and navigation skills, offering a unique challenge that tests both physical endurance and mental fortitude. For those looking to transfer their registration spot to another participant, a fee of 150 NOK applies. Detailed information regarding entry fees and available spots can be found in the Registration tab on the official website. The Oslo Trail Challenge promises an unforgettable experience for trail runners seeking adventure amidst stunning Norwegian landscapes. Whether you're tackling the full distance or choosing one of the shorter options, this event offers a chance to push your limits while enjoying the picturesque trails around Lillomarka Arena.
Races Offered
Ultra
Sep 25, 2026
straighten
Distance —
Ultra
terrain
Type —
Running
timer
83 days remaining
sell
€48.62
Oslo Trail Challenge 21K
Sep 26, 2026
straighten
Distance —
21K
terrain
Type —
Running
timer
83 days remaining
sell
€48.62
Weather History
These values represent the 3-year monthly averages for September in Oslo.
thermostatTemperature
10.2° / 16.6°
wb_sunnyFeels like
8.5° / 15.1°
light_mode
Avg sunshine hours
7h 24m
water_drop
Avg rainfall
3.7 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
9.2 km/h (Light breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (3.5)
humidity_mid
Humidity
84.4%
wb_twilight
Sunrise
06:46
nightlight
Sunset
19:36
About Oslo
Learn more about the host city, Oslo.
Oslo is Norway's capital and largest city, with 700,000 citizens in the city proper and about 1.5 million inhabitants in greater Oslo. It is in the East of the country in the Oslofjorden fjord, extending over an inlet of the Skagerrak strait. It is spaciously laid out and surrounded by green hills and mountains and includes 40 islands and 343 lakes. Oslo offers ski slopes for alpine skiing and ski trails for cross-country skiing in the winter. In the summer, the temperature in Oslo may make it comfortable to swim. There are several well-visited beach resorts. Oslo is one of the world's northernmost capitals and so gets only 6 hours of sunlight in the winter. In high summer, sunlight hours soar to 18, making its climate markedly different between seasons, with cold yet relatively dry winters.
