Claim: The first ascent on Zinalrothorn in 1864, the climbers left Zinal at 1 a.m and reached the shoulder from the ridge connecting the Blanc de Moming which is mountain of the Pennine Alps.
Evidence: The first ascent was made on 22 August 1864 via the north ridge by Leslie Stephen and Florence Crauford Grove with guides Jakob Anderegg and Melchior Anderegg (AD). They left Zinal at 1 a.m. and ascended the Zinal Glacier. They reached the shoulder from the ridge connecting the Blanc de Moming at the base of the northern ridge at 9 a.m. The Blanc de Moming is a mountain of the Pennine Alps, located south of Zinal in the canton of Valais.