Who was the first person to reach the top of mt carrantuohill?

The first recorded ascent of Carrauntoohil, Ireland's highest peak, was made by Sir John O'Donovan in 1833. However, it's important to note that local knowledge suggests that people may have climbed the mountain long before this documented ascent. O'Donovan's climb was significant for its time, as it helped to map the area more accurately.