The A591 is a major road in Cumbria, which lies almost entirely within the Lake District national park. A 2009 poll by satellite navigation firm Garmin named the stretch of the road between Windermere and Keswick as the most popular road in Britain. The 29.8 mile stretch between Kendal and Keswick was also named the UK's best driving road, according to a specially devised driving ratio formulated by car rental firm Avis.