Here are plenty of ideas from the easy going to the stamina smashers...
Mountain Col tours
Geneva Alps Provence Grand and Petite St. Bernard passes, Madeleine, Glandon 7 days +Geneva Monte Carlo Latauret, Vars, La Bonette
7 days +
Pyrenees Tourmalet, Aubisque, les Landes, Canal Latéral, Bordeaux 10 days +
Mittenwald Milan Stelvio 5 days +
Annecy Nice Télégraphe, Galibier, Izoard, Agnel, Tende 6 days +
Hilly tours
Toulouse Barcelona Canal du Midi, foothills of Pyrenees, cliff-hugging road into Spain 5 days +Le Mans Marseilles Loire and Indre valleys, Puy de Dôme, Gorges de l'Ardèche 7 days +
Cevennes and Ventoux Tarn Valley, Millau, Florac, Avignon, Bédoin, Mont Ventoux, Robion 7 days +
Short flat trips
Calais Dieppe Course, Canche valleys, Amiens2 days +
Western Front Ypres, Arras, Albert 3 days +
Calais Vimy Neuve-Chappelle, Vimy, Ypres 3 days +
Ypres Holland Ypres, Tyne Cot, Cadzand,
Dunkerque 3 days +
Dieppe Dunkerque two day dash 2 days
Hook of Holland Over Zealand then south-east to Antwerp; south-west to Ypres 3 days +Hook of Holland Dunkerque North Sea Coast Route - the Zeeland sea defences 3 days +
Somme Albert 3 days +
Dieppe Caen east Normandy 3 days +
safe cycling!