Mary Isabella Charlet-Straton (née Straton; 1838 – 12 April 1918)[1] was a British female mountain climber.

When she was eight years old she moved to Kingston upon Hull and relocated again at the age of seventeen to London in pursuit of a better education.

Following the deaths of her parents and sisters, she inherited the Straton family fortune in her twenties,[2] becoming financially independent with an income of roughly £4,000 per year.

[6] They climbed a new peak in the Aiguilles Rouges in 1881, which they named Pointe de la Persévérance in honour of "the perseverance that they had shown before they had dared to confess their affection for one another".

[1] Straton and Charlet married in November 1876, both adopting the surname Charlet-Straton, and settled in Argentière, Chamonix.