Engadin Radmarathon: Course, Elevation & Route Profile

Course & Elevation

Il Prolog opens the three-day Engadin Radmarathon race weekend on Friday with an uphill time trial from Zernez to Ova Spin, on the edge of the Swiss National Park. The assignment is short and unambiguous: just under 7 kilometres with around 420 metres of climbing, riders starting individually at 30-second intervals from a ramp in the finish area in Zernez. The profile points in one direction only. More than 90 percent of the course climbs, there is no meaningful descending, and barely three percent is flat.

The main feature is a 4.6-kilometre ascent at 7.2 percent average gradient, gaining 331 metres, which begins right after the start and touches ten percent in its steepest sections. After a brief easing comes a second, gentler segment of 1.4 kilometres at around six percent up to the finish at roughly 1,880 metres. As the curtain-raiser for a weekend that continues with La Cuorta on Saturday and La Svizra on Sunday, the prologue is less a question of distance than of dosage: a compact, honest climb on a scenic mountain road where power converts directly into time and tactics play no part.

Pacing Strategy

Il Prolog is a hill sprint, not an endurance race - over barely seven kilometres of near-constant climbing what counts is a high but just-sustainable climbing intensity for roughly twenty to thirty minutes. The long ascent from the start (4.6 kilometres, averaging 7.2 percent) carries most of the 419 vertical metres; meter your effort evenly, because there is no real recovery on a course this short. After a minimal easing around kilometre five comes a final six-percent ramp where seconds are won or lost.

The thin air above 1,500 metres punishes any over-hard start twice over. The main trap is setting a pace in the early euphoria that you cannot hold over the full distance - on a pure climb there is no descent to forgive the mistake.

Training plan for Engadin Radmarathon: 12-week build

An uphill time trial of just under 7 kilometres and around 420 metres of climbing means 20 to 40 minutes at full commitment for most amateur riders, an effort sitting right at functional threshold. Unlike the long stages later in the weekend, what counts here is not endurance economy but the highest power you can hold evenly for roughly half an hour.

The character is purely sustained-intensive: no drafting as in a bunch, no descent for recovery, just a climb that at 7.2 percent is steady enough to keep constant pressure on the pedals. Pacing the first two kilometres decides the result. Ride above threshold off the start ramp and you will pay in the upper half, where the gradient holds at six to seven percent and accumulated fatigue cannot be cleared.

Threshold intervals are the backbone of preparation, for example two to three repetitions of 12 to 20 minutes on a longer climb, progressively extending toward a continuous 30-to-40-minute effort. Add seated low-cadence climbing work to build the specific strength endurance the constant gradient asks for. Because the finish sits at roughly 1,880 metres, the same power feels harder near the top than in the valley, so plan a slightly negative effort distribution. And since La Cuorta and La Svizra follow on Saturday and Sunday, a proper warm-up and an easy spin afterwards belong in the plan, so the prologue sharpens the legs for the weekend rather than emptying them.