Starting in Lourdes..... Route options....

First post here and I hope I've placed it correctly....

I'm a US Peace Corps volunteer serving in rural Romania and there's a small group of volunteers who want to complete our years of service by walking the camino. There's some interest in starting the camino at Lourdes and join up with the Camino Frances down that line.

Can anyone give us insight into our options for routes if we start at Lourdes? Is there just one or several?

Thanks in advance for your insights!