Ben Nevis the summit only to find "fragments of earthen and glass ware, chicken bones, corks, and bits of paper". It was not until 1847 that Ben Nevis was confirmed by the Ordnance Survey as the highest mountain in Britain and Ireland, ahead of its rival Ben Macdhui. The summit observatory was built in the summer of 1883, and would remain in operation for 21 years. The first path to the summit was built at the same time as the observatory and was designed to allow ponies to carry up supplies, with a maximum gradient of one in five. The opening of
Ben Nevis races were organised until 1903, when two events were held; these were the last for 24 years, perhaps due to the closure of the summit observatory the following year. The first was from Achintee, at the foot of the Pony Track, and finished at the summit; It was won in just over an hour by Ewen MacKenzie, the observatory roadman. The second race ran from new Fort William post office, and MacKenzie lowered the record to 2 hours 10 minutes, a record he held for 34 years. The Ben Nevis Race has been run in its current form since 1937.