The cost of repairing paths in the Lake District has been put at around £300,000.
The National Trust has set up an appeal to raise the money after years of traditional lakeland weather and heavy footfall have taken their toll.
2000 metres of paths need replacing over the next two years.
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The historic event always takes place on the last Friday in July.
Early enquiries suggest the men may have taken the drug Blue Valium. Two of them remain in hospital with breathing problems.
More than 8,000 people are expected to attend over the three day event, which starts at 7pm tonight.