The Rectory and Castleton Tower, about 400 feet above the ground. Here are some images acquired from my residence with my big 500 mm lens, about 2.2 miles away.
Look close for the dark speck - nearly at the middle of the image - that’s the slackliner at the midpoint between The Rectory (left) and Castleton Tower (right).
First slackliner approaching the Tower.
Second slackliner resting before the final chug as sunset approaches.
Sister Superior group, at sunset, a bit further down the ridge. Two rescues occurred here on two successive days this last week.