09/04/2026
You know the feeling.
You roll up to a trail system you’ve never ridden before, look at the map, and start trying to decipher what the colors actually mean.
How hard is that blue? Is that black comparable to the black trails you ride at home? And how much confidence should you really put in that little colored symbol?
Trail ratings are supposed to help riders understand what lies ahead. But when those ratings vary from one trail system, region, or country to another, things get complicated.
That’s the problem the International Trail Rating System, or ITRS, is trying to solve.
For our latest Trail Builder Mag article, we spoke with ITRS architects Mischa Crumbach and Edoardo Melchiori about their effort to create a common language for mountain bike trails.
Can mountain bike trail ratings mean the same thing everywhere? ITRS founders Mischa Crumbach and Edoardo Melchiori explain their push for a global trail rating system.