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Two participants in the E250 UNESCO Jungfrau-Aletsch Trail walk next to the Swiss Aletsch glacier, the longest glacier in Europe, next to Bettmeralp, Switzerland, Friday, July 15, 2022. The course E250 UNESCO Jungfrau-Aletsch Trail, with a distance of 250 kilometers as well as 20,000 meters of altitude, is a competition being part of Eiger Ultra Trail. She start on Wednesday 13 July 2022 at Grindelwald and finish Sunday, 17 July 2022 (Time limit 100 hrs) at Grindelwald. She pass by Sefinafurgga, Hohtuerli next to Blueemlisalphuette, Gasterental and Loetschepass, Suonenwege im Wallis, Blatten-Belalp, Aletschgletscher, Fieschergletscher, Goms, Grimselpass, Haslital and Rosenlaui. The competition takes place in partial autonomy. . The Aletsch Glacier, a river of ice that stretches over 23 km from its formation in the Jungfrau region (at 4000 m) down to the Massa Gorge in Valais, around 2500 m below. (KEYSTONE/Anthony Anex)