ITRA Distance Categories

ITRA distance categories are based on typical and popular distances of trail races. They range from 2 km (Vertical) to distances over 190 km or 100 miles (Endurance).

  • Vertical
  • 10 km
  • Half marathon (21 km)
  • Marathon (42 km)
  • 50 km
  • 50 miles (80 km)
  • 100 km
  • 100 miles (166 km)
  • Endurance (>100 miles)

ITRA is the International Trail Running Association.

In reality, the exact distance of a trail race usually differs from the distance categories listed. A sufficiently large distance tolerance range is used for each race category. In this way, a race result always falls into a category.

Category

lower limit
(equal to or greater than)

upper limit
(less than)

Vertical*

2

12

10K

5

15

Half Marathon

15

35

Marathon

35

45

50K

45

65

50M

65

90

100K

90

130

100M

130

190

Endurance

190+

 
*Vertical races need an up to down ratio
of 10:1 and a minimum of 5km-effort.
This table shows the lower and upper limits per distance category. A race distance must be within the specified range to be counted in that category. Source ITRA.

Reference: ITRA.RUN (click here) – retrieved Oct 2021, English version.