To reach the eastern section of the party's route, the climbers will cross the Strahlegg Pass, making a two and a half hour detour to ascend the Strahlegghorn.
During a crossing of the pass in 1859, a well-known Grindelwald guide is said to have carelessly thrown one end of his party's rope loosely over his shoulder in order to have a free hand to carry the folded crinoline of his female employer.
Making a dogleg from the Strahlegg Glacier onto the Finsteraar Glacier, the swissinfo party will follow the ice field to its juncture with the Unteraar Glacier.
With peaks named for pioneering scientists, the area was the site of groundbreaking glacier research in the first half of the 19th century. The first permanent accommodation was built above the Unteraar Glacier in 1843.