Lon Las Cymru

You will follow Sustrans cycle route 8 all the way, with the last 55 miles along the 'Taff Trail'. Mostly on road, you will be virtually self sufficient which will make this an incredibly difficult challenge. Running for 250 miles alone is a tough enough feat, but that mileage mainly on roads will be painful. In addition, there are some big climbs along some of the route of 500metre+ elevation. A time limit will be set at 88 hours, meaning that you can complete the challenge if you keep moving at around 2.9 mph. A halfway time limit will also be strictly enforced. This will be no-nonsense, basic and low key challenge designed to push you to your limits.