SGRAIL78 Silvaplana: Course, Elevation & Route Profile

Course & Elevation

The start is at 9:30 at Camping Silvaplana. The 1,500 metres in the Silvaplanersee are swum at around 1,790 metres of altitude, wetsuits are mandatory, and the swim may be skipped entirely, a rule that says a good deal about the water temperature and the target field.

The bike is a single gravel loop of 64 kilometres with 1,307 metres of climbing; tyres of 40 millimetres and wider are recommended. It begins without warning: at kilometre 1.18 comes 1.45 kilometres averaging 9.8 percent and pitching to 19.8: cold, straight out of transition. The course then drops through a long valley section to 1,664 metres. The real backbone sits in the final third: from kilometre 45 four climbs follow in series, including 1.15 kilometres at 8.6 percent, then the main ascent of 3.5 kilometres at 9.2 percent with ramps to 18.6 up to the high point at 2,148 metres, and immediately afterwards another 1.48 kilometres at 9.4. Almost ten percent of the route is steeply uphill and a further nine steeply down. Aid stations sit at kilometre 22, 46 and 56.

The run is an alpine trail of 12.2 kilometres around Surlej with 312 metres of climbing between 1,790 and 1,933. At kilometre 2.7 comes a kilometre at 10.3 percent with pitches to 25.2, followed by a long 2.53 kilometre rise. Only a fifth of the trail is flat. The cut-offs (59 minutes for the swim, six hours on the bike, two hours running, race end at 18:00) show how long this day can become.

Pacing Strategy

The first climb is the hardest pacing decision of the race. One and a half kilometres at almost ten percent, ridden 1,180 metres after mounting, on legs cold from an alpine lake and at 1,800 metres of altitude: you can ruin the whole race here in five minutes. Take your smallest gear, stay seated and accept being passed.

Afterwards the long valley section to kilometre 45 invites the opposite: it rolls, it is fast, and it feels like gaining time. But it is only the approach to the actual race. SGRAIL78 is decided between kilometre 48 and 57, where four climbs and 320 continuous metres of ascent lead to the high point. Ride the 3.5 kilometres at 9.2 percent at an intensity you can hold at 2,100 metres. At that altitude your available power sits noticeably below your lowland figure, and the short 18 percent ramps on loose ground demand traction rather than force.

On the trail the trap is the climb at kilometre 2.7. A kilometre at over ten percent with sections touching 25, run after 64 gravel kilometres, is a hiking section and not a running one; try to run it and you lose the 2.5 kilometre rise that follows as well. Walking at high cadence here is not capitulation but the faster option.

Training plan for SGRAIL78 Silvaplana: 12-week build

SGRAIL78 takes roughly 4:30 to 7 hours depending on level; the cut-offs allow for up to nine. The demand is a long aerobic effort with pronounced spikes: almost ten percent of the bike course is steeply uphill and over 40 percent of the trail rises. On top of that comes permanently reduced oxygen availability above 1,700 metres.

The block of climbs from bike kilometre 45 and the steep trail rise at run kilometre 2.7 decide it. Both ask for climbing strength on already tired legs, both on loose ground, both at altitudes around 2,000 metres.

Bike training therefore needs long gravel climbs: repetitions of 10 to 25 minutes at eight to ten percent on unsurfaced ground, at least two per session and deliberately placed at the end of a long ride. Practise seated traction on steep loose ramps while you do: 18 percent on gravel is a question of technique, not of force. Add descending work, because almost nine percent of the course drops steeply.

For the run, uphill running and fast hiking with poles or hands on the thighs count, 60 to 150 seconds at ten percent and steeper, plus technical downhill trail work. And then the conditions, which are decisive here: early September in the Upper Engadine means cold mornings, an alpine lake with mandatory wetsuits, possible snow above 2,000 metres and intense sun at altitude. Plan at least a few days of altitude adaptation, a clothing strategy for a day that runs from frost to sun, and test your equipment. 40 millimetre tyres and gearing for 18 percent ramps are not refinements here.