Climbs
Overview of all categorised climbs in Tour de l'Ain 2025.
Longest
| Pos. | Climb | Length (km) | Steepness (%) | Top (m) | Top at KM before finish |
|---|---|---|---|---|---|
| 1 | Col du Grand Colombier | 15.3 | 7.8 | 1488 | 40 |
| 2 | Col de Portes | 14.6 | 5.5 | 993 | 26 |
| 3 | Col de Menthières | 9.1 | 6.3 | 1117 | 21 |
| 4 | Col de Montgriffon | 8.3 | 4.9 | 765 | 103 |
| 5 | Côte de Giron | 8 | 6 | 996 | 47 |
| 6 | Col de Richemond | 6 | 5 | 968 | 85 |
| 7 | Col de la Biche | 6 | 9.2 | 1306 | 75 |
| 8 | Côte d'Ambronay | 4.3 | 5.2 | 481 | 114 |
| 9 | Marignieu | 2.9 | 3.8 | 347 | 7 |
Follow-up links
Steepest
| # | Climb | Stage | Steepness (%) | Length (km) |
|---|---|---|---|---|
| 1 | Col de la Biche | Stage 3 | 9.2 | 6 |
| 2 | Col du Grand Colombier | Stage 3 | 7.8 | 15.3 |
| 3 | Col de Menthières | Stage 2 | 6.3 | 9.1 |
| 4 | Côte de Giron | Stage 2 | 6 | 8 |
| 5 | Col de Portes | Stage 1 | 5.5 | 14.6 |
| 6 | Côte d'Ambronay | Stage 2 | 5.2 | 4.3 |
| 7 | Col de Richemond | Stage 3 | 5 | 6 |
| 8 | Col de Montgriffon | Stage 2 | 4.9 | 8.3 |
| 9 | Marignieu | Stage 3 | 3.8 | 2.9 |
Hardest
For each climb we compute the climb profileScore. Instead of the average steepness, the climb profileScore looks at each 200 meter segment in the climb.
| # | Climb | Stage | Steepness (%) | Length (km) | profileScore |
|---|