All the cycling data and info you'll need to climb Honister Pass - Seatoller

Cycling Honister Pass from Seatoller

Ride 2.3 kilometers gaining 251 meters at 10.9% average grade.

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This climb is in the Lake District and included annually in the Fred Whitton Saddle Back Challenge, one of the most popular sportives in the UK.  PJAMM Fred Whitton Challenge Climb Page

Honister Pass - East

Steepest ½ kilometer begins at km 3.1 (15.1%)

Wikipedia:  

“Honister Pass is a mountain pass in the English Lake District. It is located on the B5289 road, linking Seatoller, in the valley of Borrowdale, to Gatesgarth at the southern end of Buttermere. The pass reaches an altitude of 1,167 feet (356 m), making it one of the highest in the region, and also one of the steepest, with gradients of up to 1-in-4 (25%). The saddle at the watershed is known as Honister Hause, using the Cumbrian word hause for such a feature.

Honister Pass is one of three passes that link the tourist area around Keswick, including Derwent Water and Borrowdale, with the valley of the River Cocker, including the lakes of Buttermere, Crummock Water and Loweswater. From north to south these passes are Whinlatter Pass, Newlands Pass and Honister Pass.

Honister Slate Mine and Honister Hause Youth Hostel are located at the summit of the pass.

Footpaths lead from the summit of the pass to Fleetwith Pike to the west, Grey Knotts to the south, and Dale Head to the north.

Honister Pass holds the UK 24-hour rainfall record; in the 24 hours to 6 pm on 5 December 2015, 341.4 mm of rain fell there..”  Wikipedia - Honister Pass

This climb is within Lake District National Park, 236,200 hectare (583,663 acres) established in 1951:

“The Lake District, also known as the Lakes or Lakeland, is a mountainous region in North West England. A popular holiday destination, it is famous for its lakes, forests and mountains (or fells) and its associations with the early 19th century writings of William Wordsworth and the other Lake Poets, Beatrix Potter, and John Ruskin. A National Park was established in 1951 and, following a minor extension in 2016, now covers an area of approximately 2,362 square kilometres. It was designated as a UNESCO World Heritage Site in 2017.

It is located entirely within the county of Cumbria, and all the land in England higher than 3,000 feet (914 m) above sea level lies within the National Park, including Scafell Pike, the highest mountain in England. It also contains the deepest and longest bodies of water in England, respectively Wast Water and Windermere.”  Wikipedia - Lake District National Park