Climbing "Pterodactylus" at Wasserrillen is a memorable experience. This grade 6 route (UIAA scale, likely French 6a) tests both technique and stamina over its 25-30 meters. The route likely features water grooves ("Wasserrillen" in German), which can make for interesting and often slippery holds. Expect precise footwork and good route reading to succeed. The length of the climb demands sustained effort, so pacing yourself is crucial. The satisfaction of reaching the top of "Pterodactylus" at Wasserrillen is well worth the effort.