Toughest Oslo is the most dramatic finish in the series. The 8 km main race works through varied forest and hill terrain in the Holmenkollen area above the city, then sends you straight up the Holmenkollen ski slope itself to the finish. It is a brutal, entirely legitimate closing obstacle, and it is the reason Oslo has a reputation among Nordic OCR regulars.
Race weekend follows the standard Toughest pattern: main race plus the Double Distance add-on (two laps, about 16 km) on the Saturday, then Xplore (4 km, untimed, no penalty rounds) and Family (2 km) on the Sunday. All three run from the same arena, so mixed-ability groups can all race the same weekend.
Holmenkollen sits at the end of Oslo's metro line 1, about 25 minutes from the city centre, so this is the rare mountain-terrain OCR you can reach on public transport from a downtown hotel. Prices are in NOK.
| Race | Start | Distance | Training plan |
|---|---|---|---|
| Main | — | 8.0 km | Training Plan |
| Double DistanceDoubles | — | 16.0 km | Training Plan |
| Race | Start | Distance | Training plan |
|---|---|---|---|
| FamilyKids | — | 2.0 km | Training Plan |
| Xplore | — | 4.0 km | Training Plan |
Fly into one of these airports within 250km of the race venue.
Actual weather data for this date over the past 5 years.
| Year | High | Low | Wind | Rain |
|---|---|---|---|---|
| 2025 | 16°C | 13°C | 12 km/h | 4.9mm |
| 2024 | 23°C | 14°C | 10 km/h | — |
| 2023 | 22°C | 12°C | 15 km/h | — |
| 2022 | 17°C | 8°C | 8 km/h | — |
| 2021 | 18°C | 7°C | 16 km/h | — |
Planning a multi-race trip? These races are within 500km and 4 weeks of this event.
Data source: Official race page