Bola de Mundo, also known as Alto de las Guarramillas, is an iconic high-altitude climb in Madrid’s Sierra de Guadarrama. Renowned among cycling enthusiasts, this challenging route is famous for its steep gradients and spectacular views. The climb starts from the town of Navacerrada and ascends to an elevation of 2,265 meters, making it one of the most demanding cycling routes in Spain.

The journey begins with a moderate ascent through picturesque pine forests, offering a scenic introduction to the climb. As cyclists approach the final 3 kilometers, the gradient intensifies, with inclines reaching up to 20%. This section, known for its red and white telecommunications antennas, marks the most challenging part of the ride. The road surface changes from asphalt to concrete, adding to the climb’s difficulty.

Reaching the summit of Bola de Mundo is a rewarding experience. Cyclists are greeted with panoramic views of the surrounding mountains and valleys, providing a stunning backdrop for this demanding climb. The descent offers an exhilarating ride back down, allowing cyclists to fully appreciate the landscape they conquered.

Bola de Mundo cycling is a must-try for those seeking a true test of endurance and a memorable experience in the heart of Spain. Whether you’re an experienced cyclist looking for a challenge or a traveler eager to explore Madrid’s natural beauty, this route delivers an unforgettable adventure.