Climbing "Letecká" (grade 6) in Pinnacle is a memorable experience. The route, aptly named "Aviation," likely features airy and exposed sections, demanding a good head for heights. Grade 6 indicates a moderate level of difficulty, requiring solid technique, good footwork, and the ability to read the rock. Expect sustained climbing with potentially tricky holds and sequences. The views from Pinnacle must be stunning, adding another layer of reward to the physical challenge of the climb. It's a route that would test your skills and provide a satisfying sense of accomplishment upon reaching the top.