Yorkshirewoman aims to cover 58 miles and 24 summits, including Ben Nevis, in 48 hours
Nicky Spinks will set off at midnight tonight in trying to become the first runner to complete a 116-mile Double Ramsey Round in the Scottish highlands.
The 51-year-old will take on two anti-clockwise loops of 58 miles and 24 summits, including that of Ben Nevis, Britain's highest mountain. The total ascent will be 28,500ft - almost the same height as Everest.
Of the 113 sub-24-hour completions of a Ramsey Round, Spinks has two to her name - set in 2008 and 2014, but no one has yet run in within 48 hours.
The prolific runner from Yorkshire, who is a cancer survivor, will be trying to boost funds for the charity Odyssey, for which she has already raised £15,000 - part of the reason she has been awarded with a British Empire Medal.
The woman who set a record for the Double Bob Graham Round in 2016 wrote on her blog: "After the success of the Double Bob Graham Round I needed a break for a few months but soon started to wonder about the next challenge. As I was 50 years old in 2017 I knew I wanted to attempt a Joss Naylor Challenge as near to my birthday in April as I could, so I did that. I also began to toy with the idea of a Double Ramsay Round because I love the mountains of Scotland so much and have been on the route both clockwise and anti-clockwise."
She will run in the Inov-8 G 260 Mudclaws from the first range of shoes to feature Graphene in the shoes - launched just last week.
You can follow her attempt live from midnight on this live tracker.