Cerro Puerco Trenches, Monk's Cave, and King's Chair Loop

The route starts and ends at La Pradera de Navalhorno. You'll find parking available there, which serves as a convenient starting point for this circular trail.

No, this is a difficult mountain bike route, rated for advanced riders. It demands good fitness and advanced riding skills, with technical sections rated between STS S3 and S6, meaning you'll encounter challenging obstacles, steep gradients, and potentially exposed sections. Some parts may even require pushing your bike.

This challenging route usually takes around 3 hours and 10 minutes to complete by mountain bike. However, your actual time may vary depending on your fitness level, technical skills, and how often you stop to enjoy the scenery or points of interest.

Expect a mix of demanding climbs and descents on varied natural terrain. The trail is rated difficult, with technical sections involving larger rocks, roots, and steep gradients. Given its STS S3-S6 rating, you should be prepared for challenging obstacles and potentially exposed sections that require advanced riding skills.

The route is rich in points of interest. You'll pass through the scenic Boca del Asno, encounter the historical Trincheras de Cerro Puerco, and discover the intriguing Monk's Cave (Cueva del Monje). You'll also reach the King's Chair (Silla del Rey) which offers impressive views, and cross the Anzolero Bridge.

The Sierra de Guadarrama National Park offers beautiful scenery year-round, but for mountain biking, spring and autumn generally provide the most pleasant conditions with milder temperatures and vibrant landscapes. Summer can be hot, and winter may bring snow and ice, making some sections impassable or more challenging.

As this route is located within the Sierra de Guadarrama National Park, dogs are generally allowed but must be kept on a leash at all times to protect wildlife and ensure the safety of other visitors. Always check the latest park regulations before your visit.

Generally, there are no entrance fees or specific permits required for mountain biking on established trails within the Sierra de Guadarrama National Park. However, always respect park regulations, stay on marked paths, and be aware of any temporary restrictions or specific rules that might apply to certain areas or seasons.

You can expect breathtaking scenery throughout the ride. The route traverses the Valsaín Valley, featuring immense forests of pines, oaks, and holm oaks. You'll also enjoy panoramic views of the surrounding Sierra de Guadarrama Mountain Range, especially from viewpoints like Silla del Rey and Cerro del Puerco.

Yes, the route incorporates sections of several other named trails. You'll find yourself on parts of the Sendero de los Reales Sitios, Camino de la Máquina, and Vereda de Alfonso X El Sabio, among others, as you navigate this circular mountain bike adventure.

Given the route's difficulty and length, it's crucial to be well-prepared. Pack plenty of water and snacks, a repair kit for your bike, appropriate protective gear (helmet, gloves, knee pads), and layers of clothing suitable for changing mountain weather. A first-aid kit and a fully charged phone are also highly recommended.