The brutally steep (23%) paved road to Bola del Mundo

# Bola del Mundo: Spain's Brutal Mountain Challenge

Tucked on the border between Madrid and Segovia provinces, Bola del Mundo (literally "Ball of the World") sits pretty at 2,265 meters elevation. But getting to this mountain peak? That's where things get gnarly.

The 3.1km road up from Puerto de Navacerrada might not sound long, but don't let that fool you. This fully paved route—roughed-up concrete that was laid down in 2009—is wickedly steep, regularly hitting grades of 23% that'll have your heart pounding. The average climb sits around 11.64%, but it's those brutal ramps that get you: expect a punishing 16% wall just 300 meters in, another nasty one around the 1km mark, and then the real killer—a jaw-dropping 23% segment just 500 meters from the finish. You'll gain 361 meters of elevation in that short stretch, which is no joke.

This isn't your casual Sunday drive. The road is typically closed to regular traffic due to its narrowness and extreme steepness, though it opens up during summer months. Winter? Forget about it—snow closures are common. The Vuelta a España caught on to this beast in 2010, and it's been humbling cyclists ever since.

Perched at the summit of the western Long Cuerda Larga range in the Sierra de Guadarrama, the peak is bristling with broadcast antennas. Even Alberto Contador, a legend who's won every Grand Tour, called it "very difficult and dangerous," saying it's so brutal he rarely attempts it despite living nearby.