We always take the ferry down to Santander, then come back up through France
it seems dear on the face of it, but when you take off a thousand miles riding, hotel, tyre wear, petrol, autoroute tolls etc, it works out pretty much the same.
A good itinerary is - Ferry, 2 nights & a day in the Picos,
Then head over to the Pyrenees on the Spanish side over towards Pamplona - midway overnight stop in or near Jaca.
Then take the N260 under Andorra (go there if you like, but it's a shithole) up onto the Cerdagne - head for Puigcerda - then overnight in St.Louis or Font Romeu.
Next day, head for Carcassone via Axat & Quillan ( I could give you dozens of fantastic roads around here, but time will be against you)
Then head North towards Albi - catch the Tarn & go up the gorges to Millau (Take pics under the bridge)
From Millau, head East & take the Ardeche Gorges - into the Cevennes
Then carry on East into Provence & on to the Gorge de Verdon.
Bit further East to Grasse, then up the Route Napoleon to Grenoble (if you've made good time, then a detour into the Maritime Alps.
If you're short on time - head North for an overnighter in Reims, then home.
If you fancy it, I can give you a few hotels & places to stop - but it won't be for a couple of weeks
Am on the Santander ferry myself on Tuesday night 


The older I get, the better I was
96 MkII in yellow & silver with bluespots, braided lines, Remus 2 into 1, Hagon rear shock & fork springs, bashplate, heated grips,Motech pannier racks, Road Attacks, Jockoiler, Baglux tank cover & bag. Gone to a far better place - hasn't it Remo?
Another 96 Mk2 in yellow & silver - absolutely standard & pristine ( apart from a butchered rear mudguard - but I'm looking for a new one
'76 Suzuki GT500 Stroker in need of a rebuild
'80 Yamaha XT250 mudplugger
another '81 XT250
'91 BMW R80GS - this one really will do a RTW trip
'05 BMW K1200S - inline four with a shaft
'10 BMW R1200GSA Anniversary Edition
'02 Fazer 1000 - 4 carbs are better than 2 ! - water pump rebuilt by Mr Ramrod Engineering
'00 Triumph Adventurer - Cruiser with a difference - British & a triple
Gary's Bathtub - '99 BMW K1200RS in luvverly pillarbox red . Now been Waspycycled to Nuneaton
And the Latest Addition - a nice BMW G650 XCountry greenlaner - on long term loan to Boy Wonder
1996 Kawasaki KH125 Stroker
2000 TDM Mk2A - nicely Studleyfied - Modified by Masterbrewer, but we've fixed that now !
BMW K1300R
2004 TDM 900 in Silver/Blue - heated grips, MRA vary screen, Wilbers rear shock & engine bars to fit
BMW S1000XR in white