The mountain pass of Serranillos Nature · Serranillos, Burgohondo - El Tiemblo - Cebreros, Ávila The pass linking the upper Alberche with the Tiétar valley opens at 1,575 metres of altitude, in the heart of the Sierra de Gredos, amid pine forests, oak groves and chestnut groves, with high-altitude pastures and numerous springs. Its northern side is reached from the town of Serranillos, after an 18-kilometre climb with a 721-metre elevation gain; from the south, from San Esteban del Valle, via the puerto del Pico, with 16 kilometres and an 811-metre elevation gain. The pass gained great media attention in the 1983 Vuelta a España, when the Frenchman Bernard Hinault launched on its ramps the attack with which he eliminated his main rivals, especially Julián Gorospe, and sealed the race. Photo: Asqueladd (CC BY-SA 3.0) What to see and do in Serranillos