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Ain — road climbs measured by LiDAR
All 82 published climbs in Ain, ranked by their steepest 25 m and measured on IGN’s LiDAR HD 0.5 m laser surveys.
Surface: · Caveated rows: (ranks stay the true ranks) · every published row is listed here — the toggles filter this page without hiding anything from the links above.
| # | Climb | Department | Max 25 m | Length | Net rise | Overall | Surface | Evidence |
|---|---|---|---|---|---|---|---|---|
| 1 | Voie de Nouveau Cimetière | Ain | 26.3% | 339 m | 50 m | 14.8% | mixed surface | Good |
| 2 | Montée des Acacias | Ain | 25.5% | 811 m | 120 m | 14.8% | Good | |
| 3 | Discovered lane (45.9107, 5.7285) | Ain | ≈caveated25.4% | 9805 m | 956 m | 9.8% | paved | Good |
| 4 | Montée de la Petite Côte | Ain | ≈caveated24.9% | 1039 m | 58 m | 5.5% | paved | Good |
| 5 | Discovered lane (45.8060, 5.7379) | Ain | 24.9% | 441 m | 61 m | 13.8% | paved | High |
| 6 | Route de Vaux | Ain | ≈caveated24.4% | 903 m | 75 m | 8.3% | paved | Good |
| 7 | Chemin des Tryots | Ain | ≈caveated24.4% | 1653 m | 118 m | 7.1% | paved | Good |
| 8 | Chemin de la Perrolaz | Ain | 24.3% | 1432 m | 115 m | 8.0% | paved | Good |
| 9 | Discovered lane (46.1919, 5.6806) | Ain | ≈caveated24.2% | 868 m | 88 m | 10.1% | paved | Good |
| 10 | Chemin de Morillon | Ain | ≈caveated24.2% | 416 m | 40 m | 9.6% | paved | Good |
| 11 | Discovered lane (45.7807, 5.7673) | Ain | ≈caveated23.7% | 555 m | 40 m | 7.2% | paved | Good |
| 12 | Discovered lane (45.8077, 5.7383) | Ain | 23.4% | 308 m | 45 m | 14.7% | paved | High |
| 13 | Chemin de la Serraz | Ain | 23.4% | 1799 m | 81 m | 4.5% | paved | Good |
| 14 | Lhuire le Haut | Ain | ≈caveated23.3% | 1281 m | 114 m | 8.9% | mixed surface | Good |
| 15 | Discovered lane (45.9329, 5.4432) | Ain | ≈caveated23.3% | 1252 m | 150 m | 12.0% | paved | Good |
| 16 | Chemin de la Burbande | Ain | 23.2% | 321 m | 49 m | 15.3% | paved | Good |
| 17 | Discovered lane (46.0838, 5.8846) | Ain | ≈caveated22.9% | 2057 m | 167 m | 8.1% | paved | Good |
| 18 | Chemin des Écoliers | Ain | 22.5% | 248 m | 34 m | 13.6% | gravel | Good |
| 19 | Discovered lane (45.7822, 5.4969) | Ain | 22.5% | 1386 m | 102 m | 7.4% | paved | Good |
| 20 | Chemin de Gardon | Ain | ≈caveated22.4% | 869 m | 64 m | 7.3% | paved | Good |
| 21 | Montée du Roy | Ain | ≈caveated22.3% | 428 m | 52 m | 12.0% | paved | Good |
| 22 | Montée de la Grande Perrière | Ain | 22.1% | 440 m | 60 m | 13.6% | paved | High |
| 23 | Chemin de la Ville Haute | Ain | 22.0% | 460 m | 47 m | 10.2% | paved | High |
| 24 | Chemin de la Chapelle | Ain | 21.9% | 3637 m | 248 m | 6.8% | paved | Good |
| 25 | Rue des Tours | Ain | 21.8% | 755 m | 59 m | 7.9% | paved | Good |
| 26 | Discovered lane (45.7849, 5.7586) | Ain | ≈caveated21.7% | 697 m | 80 m | 11.5% | paved | Good |
| 27 | Chemin des Morènes | Ain | ≈caveated21.6% | 1908 m | 78 m | 4.1% | paved | Good |
| 28 | Montée de Saint-Valérien | Ain | ≈caveated21.6% | 1983 m | 167 m | 8.4% | paved | Good |
| 29 | Rue de Bramafan | Ain | ≈caveated21.6% | 577 m | 62 m | 10.7% | paved | Good |
| 30 | Chemin du Réservoir | Ain | 21.5% | 302 m | 50 m | 16.7% | Good | |
| 31 | Chemin sous le Molard | Ain | ≈caveated21.3% | 776 m | 51 m | 6.6% | paved | Good |
| 32 | Cote de Parallie | Ain | ≈caveated21.2% | 616 m | 60 m | 9.7% | paved | Good |
| 33 | Chemin du Pied du Mont | Ain | ≈caveated21.2% | 368 m | 51 m | 13.7% | paved | Good |
| 34 | Montée de la Grande Côte | Ain | 21.1% | 543 m | 78 m | 14.4% | paved | Good |
| 35 | Discovered lane (45.9124, 5.4237) | Ain | 21.0% | 1498 m | 102 m | 6.8% | paved | High |
| 36 | Impasse des Jardiniers | Ain | 21.0% | 1068 m | 109 m | 10.2% | mixed surface | Good |
| 37 | Route de Ouche | Ain | 21.0% | 1644 m | 141 m | 8.6% | paved | Good |
| 38 | Route d'Hauteville | Ain | 21.0% | 424 m | 47 m | 11.2% | paved | Good |
| 39 | Discovered lane (45.9920, 5.7957) | Ain | ≈caveated20.9% | 938 m | 80 m | 8.5% | paved | Good |
| 40 | Discovered lane (45.9802, 5.4222) | Ain | ≈caveated20.8% | 4142 m | 409 m | 9.9% | paved | Needs confirmation |
| 41 | Rue de la Grand Vie | Ain | ≈caveated20.8% | 1264 m | 107 m | 8.5% | paved | Good |
| 42 | Chemin de Champ Dernier | Ain | ≈caveated20.7% | 469 m | 47 m | 9.9% | paved | Good |
| 43 | Discovered lane (45.8246, 5.4660) | Ain | ≈caveated20.5% | 888 m | 66 m | 7.4% | mixed surface | Good |
| 44 | Route de Saint-Martin | Ain | ≈caveated20.5% | 1535 m | 93 m | 6.1% | paved | Good |
| 45 | Rue du Tortoillet | Ain | ≈caveated20.5% | 441 m | 37 m | 8.3% | paved | Good |
| 46 | Chemin des Gonettes | Ain | ≈caveated20.5% | 772 m | 88 m | 11.4% | paved | Good |
| 47 | Montée du Château | Ain | ≈caveated20.4% | 1565 m | 100 m | 6.4% | Good | |
| 48 | Discovered lane (46.2087, 5.7408) | Ain | ≈caveated20.2% | 1301 m | 94 m | 7.2% | paved | Good |
| 49 | Discovered lane (45.8967, 5.5383) | Ain | ≈caveated20.2% | 1775 m | 165 m | 9.3% | paved | Good |
| 50 | Chemin du Sapin | Ain | ≈caveated20.1% | 563 m | 65 m | 11.5% | mixed surface | Good |
| 51 | Chemin d'Arançon | Ain | ≈caveated20.1% | 1389 m | 70 m | 5.0% | paved | Good |
| 52 | Rue de Villard | Ain | ≈caveated20.0% | 342 m | 49 m | 14.3% | paved | Good |
| 53 | Discovered lane (45.9324, 5.7225) | Ain | ≈caveated20.0% | 2332 m | 184 m | 7.9% | paved | Good |
| 54 | Discovered lane (45.8644, 5.5657) | Ain | 19.6% | 9005 m | 545 m | 6.1% | paved | Good |
| 55 | Discovered lane (46.1902, 5.7535) | Ain | ≈caveated18.8% | 2020 m | 207 m | 10.3% | paved | Needs confirmation |
| 56 | Discovered lane (46.1759, 5.8852) | Ain | ≈caveated17.1% | 9114 m | 606 m | 6.7% | paved | Good |
| 57 | Chemin des Vignes | Ain | ≈caveated16.5% | 2629 m | 274 m | 10.4% | Good | |
| 58 | Col du Petit Pertuis from Innimond | Ain | ≈caveated16.2% | 1962 m | 153 m | 7.8% | paved | Good |
| 59 | Discovered lane (46.0796, 5.4672) | Ain | ≈caveated16.1% | 8633 m | 502 m | 5.8% | paved | Good |
| 60 | Route du Grand Colombier | Ain | ≈caveated15.6% | 14669 m | 1187 m | 8.1% | paved | Good |
| 61 | Col du Grand Colombier from Lochieu | Ain | ≈caveated15.4% | 12533 m | 866 m | 6.9% | paved | Good |
| 62 | Col de la Biche from Corbonod | Ain | 15.1% | 13237 m | 935 m | 7.1% | paved | Good |
| 63 | Route du Grand Colombier | Ain | ≈caveated14.7% | 12019 m | 949 m | 7.9% | paved | Good |
| 64 | Col du Grand Colombier from Culoz | Ain | ≈caveated14.7% | 17288 m | 1237 m | 7.2% | paved | Good |
| 65 | Croix de Famban from Brénaz | Ain | ≈caveated14.7% | 8887 m | 567 m | 6.4% | paved | Good |
| 66 | Discovered lane (45.9506, 5.6386) | Ain | ≈caveated14.4% | 6376 m | 541 m | 8.5% | paved | Good |
| 67 | Col de Portes from Souclin | Ain | ≈caveated14.2% | 8715 m | 508 m | 5.8% | paved | Needs confirmation |
| 68 | Col de Portes from Arandas | Ain | ≈caveated13.0% | 6928 m | 467 m | 6.7% | paved | Good |
| 69 | Col de Cuvillat from Le Petit-Abergement | Ain | 12.9% | 4807 m | 315 m | 6.6% | paved | Good |
| 70 | Col de Portes from Janvais | Ain | ≈caveated12.8% | 2254 m | 163 m | 7.2% | paved | Good |
| 71 | Route de l'Épery | Ain | ≈caveated12.7% | 9103 m | 543 m | 6.0% | paved | Good |
| 72 | Col de Cuvillat from Champdor | Ain | ≈caveated12.6% | 2830 m | 196 m | 6.9% | paved | Good |
| 73 | Rue de Tenay | Ain | ≈caveated12.5% | 9679 m | 585 m | 6.0% | paved | Good |
| 74 | Col de Cuvéry from Vouvray | Ain | ≈caveated12.0% | 9578 m | 547 m | 5.7% | paved | Good |
| 75 | Col de la Faucille from Gex | Ain | 10.7% | 11062 m | 662 m | 6.0% | paved | Good |
| 76 | Col de Richemond from Injoux | Ain | 10.5% | 7725 m | 462 m | 6.0% | paved | Good |
| 77 | Col de la Rochette from Ruffieu | Ain | ≈caveated9.0% | 5516 m | 347 m | 6.3% | paved | Good |
| 78 | Col de Richemond from Brénaz | Ain | 8.9% | 6806 m | 337 m | 4.9% | paved | Good |
| 79 | Col de la Rochette from Hauteville-Lompnes | Ain | 8.6% | 5143 m | 273 m | 5.3% | paved | Good |
| 80 | Col de Combe Blanche from La Vattay | Ain | 8.4% | 1477 m | 36 m | 2.4% | paved | High |
| 81 | Col de Belle Roche from Le Dombiez | Ain | ≈caveated8.1% | 4677 m | 126 m | 2.7% | paved | Needs confirmation |
| 82 | Col de Belle Roche from Les Neyrolles | Ain | ≈caveated5.7% | 2173 m | 76 m | 3.5% | paved | Good |