Peña del Oso and Montón de Trigo Loop

This circular jogging route starts from Dehesas de Cercedilla. This area is a well-known recreational spot and serves as a popular starting point for many trails in the Sierra de Guadarrama National Park. You'll find parking facilities available there, though it's advisable to arrive early, especially on weekends, as it can get busy.

This is a challenging route, covering a distance of approximately 27.7 km (17.2 miles) with significant elevation gain. For a jogger, it's estimated to take around 4 hours and 39 minutes to complete, depending on your fitness level and how often you stop to enjoy the views.

The terrain is quite varied and can be demanding. You'll encounter extensive Scots pine forests, oak, and ash groves. While some sections might follow forest tracks or even paved surfaces in lower areas, as you gain elevation, the terrain becomes more technical. Expect uneven, rocky, and rooted surfaces, loose gravel, and steep inclines, especially closer to the summits of Montón de Trigo Summit and Peña del Oso (2,196 m).

No, this route is classified as difficult. With a distance of nearly 28 km and over 1200 meters of elevation gain, it requires very good fitness, sure-footedness, and sturdy shoes. It's best suited for experienced joggers who are comfortable with mountain terrain and significant ascents.

You can expect breathtaking scenery throughout the route. You'll ascend through lush pine forests and valleys, offering panoramic views of the Sierra de Guadarrama. From higher vantage points, you'll see the main peaks of the Sierra and the plains of Madrid and Segovia. The route passes by significant highlights like Montón de Trigo Summit, Tirobarra Pass, and Peña del Oso (2,196 m), providing stunning vistas.

Yes, the Sierra de Guadarrama National Park generally allows dogs on trails, but they must be kept on a leash at all times to protect wildlife and ensure the safety of other trail users. Always clean up after your pet.

The best times to jog this route are typically spring and autumn. In spring, the weather is milder, and the landscape is vibrant. Autumn offers particularly stunning colors in the forests, making for a beautiful experience. Summer can be very hot, especially at lower elevations, and winter can bring snow and ice, making the high-altitude sections challenging and potentially dangerous without proper gear and experience.

Generally, there are no entrance fees or specific permits required for day use of the trails within the Sierra de Guadarrama National Park, including this route. However, it's always good practice to check the official park regulations before your visit, especially for any specific activities or if you plan to stay overnight.

Yes, this route integrates with several other trails in the area. You'll find sections that overlap with paths like Senda Herreros, Camino Schmidt, and the Calzada romana de la Fuenfría, which adds to the historical and natural richness of the experience.

Yes, Dehesas de Cercedilla is a recreational area and a convenient starting point. You'll find some amenities there, and the nearby town of Cercedilla offers a wider range of facilities, including cafes, restaurants, and pubs, perfect for a post-jog refreshment.

Given the route's difficulty and varied terrain, you should wear appropriate trail running shoes with good grip and ankle support. Dress in layers, as temperatures can change significantly with elevation. Always carry enough water, high-energy snacks, a map or GPS device (like komoot), a first-aid kit, and sun protection. A lightweight windbreaker or waterproof jacket is also recommended, even on clear days, as mountain weather can be unpredictable.