A relatively short ridge (that can do for a 2 day trek if combined with nearby Siriu however), the Ciucaș is an interesting mountain. It combines the wide pastures with imposing rock formations, especially in Tigăile Mari and Zăganu areas. Not the best mountains for bike riding (except for Bratocea Ridge and the foothills, as well as a few valleys), but that did not keep me from going. Details of the ride here and tracks on my GPS track page.