Route des Grandes Alpes: Thonon les Bains to Col de l Iseran
Plan this ride
Recorded distance
236 km
Riding-time estimate
4 h 46
Journey
One way; return travel is separate
Distance and timing basis
Ordered leg totals agree within rounding. Stop distances are approximate sums of rounded legs. Stops, delays, approach and any separate return travel add time. Basis: producer-declared routed record.
Reading history stays on this device. My road watch requires a separate selection; opening it does not subscribe this ride.
Distance and riding time are measured on the routed road. Check local closures and conditions before you ride.
A 236 km one-way ride from near Thonon-les-Bains, about 4 h 46 of riding. It goes by way of Col des Gets, Col des Aravis and Col du Cormet de Roselend. The highest point is about 2,750 m. Cormet de Roselend is subject to seasonal closure - check it is open before you set off. It suits an unhurried touring pace.
Scenic road chapters
Route des Grandes Alpes
The ground tilts up and stays tilted for 37 km. 1172 m of it, taken steadily rather than in one wall. A steady rhythm suits this better than bursts. The height arrives whether you hurry or not.
Chapter facts
Length
37 km
Climb
1172 m
Average gradient
3.4%
High point
1172 m
Col des Gets → Col des Aravis
This is where a day makes up time without anyone trying. Third and fourth, and very little else. 47 km that neither climbs nor drops much. The road settles into the ground rather than fighting it.
Chapter facts
Length
65 km
Climb
314 m
High point
1486 m
Route des Grandes Alpes
The last of the trees go and the road runs out onto open ground. The summit sits at 1967 m, and what surrounds it is rock, weather and distance — cold comes early up here and stays late. Ride it with something in reserve: the summit is not the end of the work, only the middle of it.
Rider note
Check the pass is open before you commit to it.
Chapter facts
Length
62 km
Climb
481 m
High point
1967 m
Named road
Route des Grandes Alpes
Waypoint introductions and full write-ups
1. Thonon les Bains
Thonon-les-Bains sits on the southern shore of Lake Geneva, facing Switzerland across about ten kilometres of water, and it is where the Route des Grandes Alpes officially starts. This was the first great tourist road of France, planned in the early twentieth century by the Touring Club de France to link the lake with the Mediterranean via the highest passes of the French Alps, and the road runs for about seven hundred kilometres over a series of cols, ending in Menton. The fine promenade along the lake, with its views of the Swiss shore and the Jura, and the fish restaurants serving perch fillets, are a gentle prelude.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Thonon les Bains is where the day begins. Next is Col des Gets.
2. Col des Gets
The Col des Gets is a gentle pass of 1,172 metres between the Giffre and Dranse valleys in the Haute-Savoie, linking the villages of Les Gets and Morzine, and it sits on the old Route des Grandes Alpes, the long road from Lake Geneva to the Mediterranean. It is not a high or wild pass, but it is a handsome one, with rolling meadows, fir forests and wooden chalets, and the crest of the hills above it holds ski lifts that turn into mountain bike routes in summer.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Col des Gets comes up about 37 km into the recorded legs. Next is Col des Aravis, climbing 314 m.
3. Col des Aravis
The Col des Aravis, at 1,486 metres, joins the Arve and Thônes valleys across the Aravis range, and it is one of the most scenic of the middle-height passes in the northern French Alps. The view from the pass looks across to the Mont Blanc massif, dominating the skyline on a clear day, with the white dome and glaciers above dark forests, and in front of it stretch the green pastures of the Aravis. A handful of chalets and a small café stand near the summit, and several farms sell cheese directly from their barns.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
about 102 km into the recorded legs you reach Col des Aravis. The road climbs 314 m on the way up to it, steadily. Next is Col du Cormet de Roselend, climbing 481 m.
4. Col du Cormet de Roselend
The Cormet de Roselend is the pass of cheese and water. It lies in the Beaufortain massif, between the town of Beaufort and the valley of the Isère, and for much of the climb you are riding through the pastures where the cows that make Beaufort cheese spend their summers, wearing bells and grazing on alpine flowers. The cheese, which is aged in the valley, is one of the most prized in France, and it is the reason this valley is prosperous and well kept. A wheel, with its distinctive concave edge, is sold in nearly every village.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Col du Cormet de Roselend, late in the day at 1967 m. The road climbs 481 m on the way up to it, steadily. Next is Col de l Iseran, climbing 797 m.
5. Col de l Iseran
The Iseran is the roof of the Alps, as far as paved passes go. At 2,764 metres, it is the highest of the great Alpine passes, a shade above the Stelvio, and the road over it was opened in 1937 to link the Tarentaise valley with the Maurienne, a feat of engineering that took years of work in short summers. It goes through the heart of the Vanoise National Park, France's first, created in 1963 to protect the ibex, which had been almost wiped out by hunters, and the park's work has been a success, as there are thousands now.
May refer to an earlier itinerary; verify against your selected route before riding.
Planning note
Finish at Col de l Iseran. That is the ride. The road climbs 797 m on the way up to it, steadily. Nothing on this route is higher.
Leg by leg
Thonon les Bains to Col des Gets
Thonon les Bains → Col des Gets climbs about 1172 m in 37 km. This is the part worth slowing down for - look through the bends and use the pull-offs.
Col des Gets to Col des Aravis
Col des Gets → Col des Aravis is 65 km of rhythm rather than effort. Let it flow and let the view breathe.
Col des Aravis to Col du Cormet de Roselend
Col des Aravis → Col du Cormet de Roselend climbs about 481 m in 62 km. This is the part worth slowing down for - look through the bends and use the pull-offs.
Col du Cormet de Roselend to Col de l Iseran
Col du Cormet de Roselend → Col de l Iseran climbs about 797 m in 72 km. This is the part worth slowing down for - look through the bends and use the pull-offs.