Bon Deblois, a tour guide leading another hiking group, told GMA News television they heard a loud explosion before visibility was reduced.

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When he called, Bauer told him the group had awakened early and continued hiking on the same trial.

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Best regarded in the hiking community are walks organised by the volunteer group Ramblers, which runs outings along slices of the path throughout the UK. Most outings are in the summer.

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