Can You Climb a Mountain?

In 1250, you'd be too busy plowing your field and staving off death to go for a hike in the mountains. You're only working two thirds of the days of the year on the on the 13th century liturgical calendar. Those other thirds are hiking Mount Rainier. All of the other days are fast days or festival days. So on a festival day, can you climb a mountain? I tend to agree with Grant.