This 100km route, planted almost exclusively with white chardonnay grapes (the name means ‘hillside of the whites’), begins along Épernay’s majestic av de Champagne and then heads south to Sézanne and beyond. Stops en route include Cramant (of giant Champagne bottle fame), Avize and Le Mesnil-sur-Oger. The gently rolling landscape is at its most attractive in late summer and autumn.