Mont-Blanc 90K

90 km Distance

6,140 m Climbing

10.0 Grit · Elite / extreme

45.9237° N, 6.8694° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 68 m / km Mountain. Significant climbing. Steep sections will require power hiking.

Time limit 24 hours 16:00 min/km average. Generous. Room to walk the climbs and stop at aid. Among the most forgiving 50 mi cut-offs we track. Measured against 472 races of the same distance. Cut-off calculator →

Typical conditions, June

Daytime high 16°C

Night low 7°C

Rainfall Showers likely

Regional 2001-2020 average for June — NASA POWER, grid elevation 1714 m. Not a forecast.

Course notes

terrain This is a mountain course. Poles are highly recommended for the sustained climbs.
gear With mountain terrain, choose a shoe with aggressive lugs (5mm+) for optimal performance.

Gear for this race

Chosen for 90 km of mountain with 6,140 m of ascent.

Trail Running Shoes 68 m of climb per kilometre — grip and rock protection before cushioning.
Race Nutrition 90 km of self-supported fuelling between aid stations.
Hydration Vests Pole attachment and chest-strap stability on steep ground.
Trekking Poles 6,140 m of ascent to walk up.
Headlamps A 24 h limit puts you out there after dark.