Short answers, pulled from the story.
Petrarch climbed to the top of Mont Ventoux on the 26th of April 1336 with his brother and two servants. He performed this ascent for recreation rather than necessity as described in a celebrated letter to Dionigi di Borgo San Sepolcro.
Antoine de Ville became the first person to officially verify an ascent of technical difficulty on the 26th of June 1492. He used ropes, ladders, and iron hooks to ascend Mont Aiguille during this historic event.
Abel Crawford and his son Ethan cleared a trail to Mount Washington New Hampshire in 1819. This eight point five mile path remains the oldest continually used hiking trail in the United States today.
The Jordan Trail spans 650 kilometers or 400 miles established in 2015 by the Jordan Trail Association. It connects various points across Jordan as part of a recognized long-distance walking route.
Benton MacKaye conceived the idea of the Appalachian Trail in 1921 and it completed its route from Maine to Georgia in August 1937. The National Park Service was created in 1916 to protect national parks and monuments before this completion.