It seems Home Moss is quite a famous climb. Here's an extract from wikipedia:
"Holme Moss has long been considered one of England's most punishing bicycle ascents, rising some 400m from the floor of the Holme Valley at Holmbridge in about 5 km.
The climb begins up Holme Bank, before proceeding with a slight let-off through Holme village to the bridge that marks the beginning of the climb proper. From here, the only way is up, and a tough way it is at that, going initially through switchbacks that have none of the grace or gentility of their alpine counterparts, but serve merely to provide a nasty surprise when the poor rider turns the corner directly into the South-Westerly wind. The final pull is long and gruelling, passing as it does a narrowed section of road that has been under repair for many years, and that offers a nasty experience with traffic (notably motorbikes) on busy Sundays. Once the car park has been passed, however, the end is in sight, as the road flattens and the rider's gears can slowly be cranked up once more as the true summit of the climb – the sign marking entry into Derbyshire – is reached.
This explains the Moss's fearsome reputation, and it is for this reason that it has been, on many occasions, picked as part of the route of many of Britain's premier bike races. For many years the (now sadly defunct) Leeds Classic race saw world class riders (many of them, such as Bjarne Riis, veterans of the Tour de France, hence the moniker 'Le Col de Moss') toiling up its slopes, whilst 2004 and 2005 witnessed the riders of the new Tour of Britain scale the climb as part of the Yorkshire stage of the race. Needless to say, the nature of this most terrifying of hills drew a large crowd that filled the road and brought further comparison between Holme Moss and the great climbs of le Tour. Closer to home, every year at the beginning of September hundreds of suffering mountain bikers string themselves out along the length of the climb as part of the Holme Valley Mountain Bike Challenge, a 28-mile route that starts and finishes at nearby Hade Edge. As you can imagine, Holme Moss represents the hardest part of the route, and long may it continue to do so."