There are points on the Karst where the ground stops being “earth” and becomes a page of stone. It is not a meadow, it is not a beaten path: it is a natural pavement etched by lines, grooves, cracks. I carted fields. You recognise them immediately: they seem to have been traced by an ancient hand, as if someone had scratched the rock to show you the way. And instead it was nature, with patience, that wrote that drawing.
During the La Corsa della Bora you will meet them again and again. On Rilke Path, Almost at the finish, they are a last glance that brings you back to the present: after kilometres of effort, you realise that you are running (or walking) on a work sculpted by time.
In races over 21 km, You find them even in the first kilometres overlooking the sea: the horizon is there, close by, and under your shoes you feel that living, irregular rock, full of detail.
But if you really want to “understand” what carreer fields are, it is on the 57 km that the Karst shows you unsparingly: long stretches where stone dominates and the ideal line is never just one. Every lean becomes a choice, every step a micro-decision.
This year there is a special moment: only edition on this route, we will cross a stretch unmarked. No real path, just an old track following the First World War trenches. It is one of those passages that make you lower your voice even if you are alone: you feel as if you are entering a piece of history, and the landscape changes pace. Here, between stone and memory, you will see some of the most beautiful and extensive of the Karst.
Karst fields form because water, enriched with CO₂ (in the air and especially in the soil), becomes slightly acidic and dissolves limestones slowly. It does not do so uniformly: it flows and concentrates along small irregularities and fractures in the rock, deepening them over time. Thus are born grooves and grooves increasingly sharp, separated by ridges: an etched “floor”, shaped more by chemistry than by force.
Beautiful, but to be respected
They are spectacular, yes. And precisely for this reason they must be treated with care: the rock is porous, often offers good grip, but can be sharp. When you get there, change pace: you don't need to “attack”, you need to read. Slow down half a second, choose your footing, look up. It is one of those stretches where the Karst is not just the background: it is the protagonist.