The roads of the Tour Auvergne-Rhône-Alpes — the race that the cycling world still instinctively calls the Critérium du Dauphiné — represent some of the finest cycling terrain on the European continent. This is not hyperbole. The region covers the western Alps south of Grenoble: the Chartreuse massif with its limestone walls and dark forests, the Vercors plateau with its vertiginous cliff-top roads, the Belledonne range shimmering above the Isère valley, and beyond those, the Aravis and the first great approaches toward Mont Blanc. Professional cycling discovered this region early and has returned faithfully for decades because the roads are simply extraordinary.
For the amateur cyclist — the gran-fondo rider, the cycling tourist, the climber chasing altitude and views — these roads offer something even more valuable: they are largely empty outside race week, scenic beyond expectation, and entirely manageable for riders with a reasonable climbing base. The cols that the Tour Auvergne-Rhône-Alpes will traverse June 7-14 are yours to ride for the rest of the summer.
This guide covers the best climbs, how to get there, what to ride, and how to prepare.
The Great Climbs of the Dauphiné
Col de l'Arzelier: The Chartreuse Introduction
8.6km at 5.7% average — accessible via Château-Bernard from the western side, the Arzelier is a mid-tier Alpine col that provides the Chartreuse massif's most straightforward gateway. The gradient is consistent enough to allow a sustainable rhythm but honest enough to remind you that 8.6km at 5.7% in thin Alpine air is not the same as on flat terrain.
The summit at 1,154m offers views over the Vercors to the southwest and the Belledonne across the Grésivaudan valley. On a clear morning, the panorama extends to Mont Blanc. The descent west drops through limestone gorges toward the Drac river — one of the most beautiful road descents in the pre-Alps.
Recommended approach: Ride from Grenoble via the Gorges du Bruyant (D106) — an extraordinary limestone canyon road that connects the valley floor to the Chartreuse interior. The gorge road is partly tunnelled through cliff faces and opens dramatically onto the plateau above.
Côte de Quaix-en-Chartreuse: The Short Sharp Shock
2.3km at 9.2% average — this small-town côte north of Grenoble is the route's wildcard: short enough to underestimate, steep enough to punish that error. The average masks pitches above 11% in the upper section. Its brevity is its cruelty — there's no time to settle into a rhythm before it ends, and the effort required, relative to duration, is genuinely punishing.
As a standalone training climb from Grenoble (easily accessible from the northern suburbs), Quaix-en-Chartreuse offers the ideal threshold effort — 10-14 minutes at maximal sustainable power. Local Grenoble cyclists use it as a benchmark test.
Col de Vence: The Limestone Belvedere
5.1km at 6% — the Col de Vence isn't the most famous climb in the Dauphiné, but it offers exceptional views over the Trièves basin and the Dévoluy mountains to the south. The road quality is excellent, gradients are consistent, and the summit — at 1,057m — sits in extraordinary open country where the sky feels larger than elsewhere.
Combined with the Côte de Rousset in the same day, this gives a 35-45km loop from Saint-Jean-en-Royans that covers over 1,500m of vertical gain. An outstanding half-day ride.
Côte de Rousset: The Stage's Defining Climb
8.2km at 7.6% average — today's queen stage ascent, and the hardest climb on this year's Stage 1. The Rousset climbs from the Drôme valley through forest and limestone outcrop terrain, with gradient variations that prevent any true relaxation. The steepest pitches reach 10-11% in the middle third. With 21km to the Stage 1 finish, this is where the general classification was shaped today.
For amateur cyclists, the Rousset is a proper day out from the valley. Start from Saint-Jean-en-Royans or the Combe Laval and you have one of the most complete Alpine cycling experiences available in France without requiring 2,000m+ altitude.
The Cols of the Wider Dauphiné
The Tour Auvergne-Rhône-Alpes uses only a portion of this region's legendary road cycling inventory. Within easy range of Grenoble:
Col du Galibier (2,645m) — the highest paved pass in the Alps, and one of cycling mythology's great cathedrals. Approach from Valloire (21km at 6.9%) or the Telegraphe-Galibier combination from Saint-Michel-de-Maurienne. Allow a full day.
Col d'Ornon (1,371m) — the Belledonne range's most accessible pass from Grenoble, stunning views, moderate gradient (19km at 4.8%), limited traffic.
Col du Glandon (1,924m) — a serious Alpine col connecting the Maurienne to the Oisans. 23km at 5.1% from Saint-Étienne-de-Cuines.
Col de la Croix de Fer (2,067m) — an Alpe d'Huez-adjacent classic, 22km at 5.2% from Saint-Jean-de-Maurienne. Often combined with the Glandon in a single epic loop.
Logistics: Getting to Grenoble
By air: Grenoble-Alpes Isère Airport (GNB) receives seasonal flights from UK and Northern European cities (Ryanair, EasyJet). Lyon-Saint Exupéry (LYS) is 100km from Grenoble and handles more international routes — Flixbus and Ouibus provide direct coach connections. Paris Charles de Gaulle (CDG) connects via TGV to Grenoble in 3 hours.
By train: Grenoble is an excellent rail hub. The station is walkable from the city centre and accommodation. Most cycling infrastructure for heading to climbs is accessible directly from the city by bike.
By car: The A48/A41 motorway connects Lyon to Grenoble. N85 (Route Napoléon) provides a scenic approach from the south. Parking in the mountains is generally free and plentiful.
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Grenoble city: The most practical base, with the full range of accommodation options. Hotel Europole and Hotel Mercure Centre are reliable mid-range choices. For cyclists, Hotel les 3 Roses near the station provides dedicated bike storage.
Villard-de-Lans (Vercors): The best base for Vercors-focused riding — 35km from Grenoble, at 1,050m altitude. Several cyclist-friendly chambres d'hôtes and small hotels. The Vercors plateau views from evening dining terraces are extraordinary.
Bourg-d'Oisans (Alpe d'Huez region): If your goal extends to the greatest climbs of the Oisans — Alpe d'Huez, the Glandon, the Croix de Fer — this small town at the base of the famous hairpin road is the cyclist's capital of the Alps. La Cascade camping is beloved by cyclists from across Europe.
Gear and Bike Setup
Bike: Road bike with compact gearing (34/28 minimum for the steeper climbs). Gravel bikes with 32mm+ tyres handle the occasional rough surface on col roads perfectly and offer more comfort.
Tyres: 25-28mm for pure road, 32mm+ for gravel comfort. The Vercors plateau roads include some chaussée déformée (deformed roadway) sections.
Helmet: Always. A well-ventilated road helmet manages the summer heat. The afternoon sun at altitude is unforgiving.
Clothing: June brings warm valley temperatures but summit temperatures 10-15°C cooler. A packable wind jacket in a jersey pocket is essential. Lightweight knee warmers for descents above 1,500m.
Nutrition: Alpine climbs exceed 90-minute duration regularly. Minimum 2 bottles plus gels/bars for any serious ascent. Resupply points on popular cols have small buvettes (snack bars), but don't rely on them.
Training Plan for Alpine Cycling
6-week preparation base: - Weeks 1-2: Build to 8-10 hours weekly. Include 1 long ride (3-4 hours) and 2 moderate rides (2 hours each) - Weeks 3-4: Introduce climbing-specific work. Threshold intervals on sustained gradients — 4 × 10 minutes at RPE 8/10 with 5-minute recoveries - Week 5: Volume peak. 12 hours including two back-to-back long rides to simulate mountain touring - Week 6: Taper. Reduce volume 30%, maintain intensity. Arrive in Grenoble fresh
Key workouts: - Sweet spot intervals (88-93% FTP) simulate sustained col-climbing effort - Over-unders (alternate 1 min above / 1 min below threshold) develop resilience for gradient changes - Long endurance rides at 65-75% FTP build the aerobic base that determines your ceiling
Food and Culture
Grenoble: The place to eat in Grenoble is the Halles Sainte-Claire market (Tuesday–Sunday mornings) — charcuterie from Savoie, Saint-Marcellin cheese from the Isère valley (one of France's great washed-rind cheeses, best eaten with a spoon), Chartreuse-based liqueurs. Café de la Table Ronde on Place Saint-André is the oldest café in France (1739) and serves excellent formule lunches.
On the road: The Vercors plateau villages — Villard-de-Lans, Lans-en-Vercors, Autrans — are bicycle-touring orientated and café-rich. Order the ravioles du Dauphiné (small cheese-filled pasta, a regional signature) wherever you find them.
For today's field report from Stage 1, see Tour Auvergne-Rhône-Alpes 2026 Stage 1: The Alps Awaken at Vizille.
FAQ
Do I need a road bike or can I use a gravel bike? Both work excellently in this region. The main col roads are entirely paved. A gravel bike with 32-35mm tyres handles everything comfortably and provides better ride quality on some of the rougher mountain roads. Pure road bikes with 25-28mm tyres are faster on the climbs. Choose based on your priority: pure speed or versatile comfort.
How much climbing can I realistically do in a day? For an athletic recreational cyclist (100-150km weekly base), 2,000-2,500m of vertical gain per day is manageable and satisfying. Elite cyclists can sustain 3,500-4,500m per day. Build to your target altitude gradually — many visitors underestimate the cumulative fatigue of Alpine days.
What is the best month to ride these cols? June is exceptional — matching the race week conditions. Cols are open, temperatures are warm but not extreme, and tourist traffic on mountain roads is moderate. July-August are the busiest months. September offers beautiful conditions with lower crowds and the best light. May can bring late snow on the highest passes (Galibier, Glandon) — check opening dates.
Is Chartreuse liqueur worth buying at the monastery? Absolutely. The Chartreuse Distillery is in Voiron, 30km from Grenoble, and the tasting room at the museum is free to enter. The Verte (green, 55% ABV) and Jaune (yellow, 40% ABV) liqueurs have been produced by the Carthusian monks since 1737. Buy the 70cl bottle — it fits in a musette perfectly and makes an extraordinary souvenir from these roads.