Access from A71 from Paris or A75 from Montpellier:
Exit 16, follow ClermontFd Center, 3 kms Bridge station, under the bridge to fire at 3rd Street and then left to right. 
 
Access from A72 from Lyon / St-Etienne:
After toll Clermont South, follow ClermontFd Center, 3 kms Bridge station, under the bridge to fire at 3rd Street and then left to right.

For a specific plan and your calculations of routes up to the Hotel de la Gare