10 of the Most Toughest Treks in the World

1. Everest Base Camp Trek, Nepal

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2. K2 Base Camp Trek, Pakistan

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3. Annapurna Circuit, Nepal

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4. Huayhuash Circuit, Peru

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5. Mount Kilimanjaro, Tanzania

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6. The Snowman Trek, Bhutan

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7. GR20, Corsica, France

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8. Cordillera Huayhuash Trek, Peru

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9. Fitz Roy Trek, Patagonia, Argentina

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10. The Haute Route, France and Switzerland

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