Calar Alto, situated in Andalusia’s Sierra de los Filabres, offers cyclists a demanding climb to one of Spain’s most renowned high-altitude destinations. Known for its astronomical observatory, the highest in mainland Europe, Calar Alto presents a challenging yet rewarding ascent, perfect for those looking to push their limits in a unique landscape.

The cycling route begins in the village of Gérgal and stretches over 30 kilometers, with an average gradient of 5.5%. The climb is characterized by a series of switchbacks and long, steady inclines, offering both physical challenge and breathtaking views. As cyclists ascend, they pass through varied terrain, from arid landscapes typical of southern Spain to lush pine forests as they approach the summit.

At the top of Calar Alto, cyclists are rewarded with panoramic views of the surrounding mountains and valleys. The observatory, a prominent feature at the summit, offers a glimpse into the region’s significance in astronomical research. The climb’s remote location ensures minimal traffic, allowing cyclists to fully immerse themselves in the serene environment and focus on the challenge at hand.

Calar Alto cycling is ideal for experienced riders seeking a high-altitude adventure in a less-traveled region of Spain. The combination of challenging gradients, spectacular scenery, and the unique allure of an astronomical observatory makes this climb a standout experience in Andalusia. Nearby you get access to five other Deux Mille climbs with Pico Veleta being the most notable.