By car
From Lyon:
Two possible routes:
> Route via the Fréjus Tunnel (toll): follow the A43, then take the N543. At the Fréjus Tunnel, take T4, D1T and D994G towards Le Rosier in Val-des-Prés.
> Route to avoid the Fréjus Tunnel: go via Grenoble and take the Col du Lautaret via the D1091. Please note the traffic restrictions for the Chambon Tunnel: the tunnel is open during the day (5am–9pm) from 24 July to 21 August at 12:00pm; then the emergency road opens from 22 August, accessible by car only — not suitable for motorhomes or caravans.
From Annecy:
Take the A43 then the N6, follow Valloire then take the D902.
From the South-East:
Head to Gap, then take the direction of Briançon via the N94.