Bourg-d'Oisans, French Alps, France · Traditionally held in early July
Training for La Marmotte Granfondo Alpes
La Marmotte is one of the oldest and most prestigious gran fondos in the world, following a Tour de France-worthy route over the Col du Glandon, Col du Télégraphe and Col du Galibier before the legendary finish up Alpe d'Huez. Check the official site for current dates and route details.
Routes (approximate, recent editions)
- About 175 km and 5,000 m of climbing, finishing atop Alpe d'Huez
Key climbs
- Alpe d'Huez — 13.8 km at 8.2%
- Col du Galibier — 18.1 km at 6.8%
- Col du Glandon
- Col du Télégraphe
What it demands
The brutal part is arithmetic: after roughly 160 km and three major passes, you still have to climb Alpe d'Huez — 21 hairpins at over 8% — on empty legs. Long-ride durability and disciplined fuelling beat raw FTP here.
Could you handle Alpe d'Huez?
The signature climb of La Marmotte Granfondo Alpes. Enter your power and weight — a physics engine estimates your time on the gradient profile.
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See how power and weight affect your time on a real climb.
*Demo simulation uses standard road bike physics (CdA 0.32, Crr 0.004). for custom bike types, surface analysis, and detailed splits.
FAQ
How hard is La Marmotte Granfondo Alpes?
The brutal part is arithmetic: after roughly 160 km and three major passes, you still have to climb Alpe d'Huez — 21 hairpins at over 8% — on empty legs. Long-ride durability and disciplined fuelling beat raw FTP here.
What are the key climbs of La Marmotte Granfondo Alpes?
Alpe d'Huez, Col du Galibier, Col du Glandon, Col du Télégraphe. Routes can vary by edition — always check the official event site for the current course.
How should I train for La Marmotte Granfondo Alpes?
Work backwards from the event date: build aerobic endurance first, then add sustained climbing intensity (threshold and sweet spot), and practise fuelling on long rides. TrainCraft builds a structured plan around your event date and adapts it when you miss sessions, using fatigue science (CTL/ATL/TSB).
Build your La Marmotte Granfondo Alpes plan
Tell TrainCraft your event date, FTP and available hours — it builds a structured plan and adapts it when life gets in the way. Free to start.
Start Training FreeTrainCraft is not affiliated with La Marmotte Granfondo Alpes. Route figures are approximate and based on recent editions — always check the official event website for current dates, routes and entry details.
Got an event on the calendar?
A date on the calendar is the best training motivation there is. TrainCraft builds a structured plan around your event and adapts it when life gets in the way. Free to start.