Bygdøymila is an October trail race on Bygdøy, featuring routes through paths and woodland instead of a city course limited to roads. Families can participate together, choosing from different distances: 1 km for the youngest children, an unranked 3 km within Bygdøyskogen, a 6 km option, or the classic measured Bygdøymila distance.
The event is designed for residents on and around Bygdøy, functioning as a local running day as much as a competitive race. The 3 km course remains low-pressure by omitting rankings, while the measured classic course offers a defined objective for more competitive runners. All finishers receive a prize for completing their selected distance.