8. Polojska ultra

Competitors in the 100km race run 21 laps, with the first lap being 3km, including a turnaround at 1.3km. The main lap is 4.85km, and there are 20 laps in total.

Competitors in the 50km race run 11 laps, with the first lap being 1.45km, including a turnaround at 520m. The main lap is 4.85km, and there are 10 laps in total.

The 50km relay consists of 2 members, and the 100km relay consists of 2 or 4 members. Each relay member runs 25km or 50km, depending on the number of members. Exchanges take place in the start-finish area.

The 50km relay consists of 2 members, and the 100km relay consists of 2 or 4 members. Each relay member runs 25km or 50km, depending on the number of members. Exchanges take place in the start-finish area.