Valle de Iruelas and Puerto de Casillas Loop

The estimated riding time for this challenging mountain bike route is approximately 4 hours and 22 minutes. However, this can vary depending on your fitness level, technical skills, and how often you stop to enjoy the views.

No, this trail is classified as difficult and requires very good fitness and advanced riding skills. It features significant elevation gains, technical sections, and some parts may even require you to push your bike.

The terrain is highly varied, combining stretches of forest tracks (pista forestal) with more technical singletracks (senderos trialeros). You can expect a mix of unpaved, bumpy, and rocky segments, along with numerous 'sube y baja' (up and down) sections throughout the route.

You'll encounter several stunning features, including the beautiful El Burguillo Reservoir, panoramic views from Puerto de Casillas – Entrance to the Valle de Iruelas Nature Reserve, and the enchanting El Castañar Forest. The route also passes by the Charco del Cura reservoir and offers vistas of the Sierra del Valle.

Autumn is highly recommended for this trail, especially when the El Castañar Forest transforms with vibrant seasonal colors. The weather is also generally more pleasant for challenging rides during this time.

Yes, the route briefly intersects with sections of other trails such as Valle del Tiétar, Senda del Enebral, Camino de la Artezuela, Camino de Casillas, and Ruta El Pozo de la Nieve PR-AV 21.

While dogs are generally allowed in the Valle de Iruelas Natural Reserve, it's crucial to keep them on a leash to protect the local wildlife, especially during nesting seasons. Given the trail's difficulty and technical sections, consider if it's suitable for your dog's fitness and paw safety.

Typically, there are no general entrance fees or permits required for hiking or mountain biking within the Valle de Iruelas Natural Reserve. However, it's always a good idea to check the official website of the reserve or local tourism offices for any updated regulations or specific restrictions, especially concerning vehicle access or protected areas.

This is a circular route starting and ending in El Tiemblo. You can usually find parking in or around the town of El Tiemblo, which serves as a convenient base for accessing the trail.

Given the trail's length and difficulty, you should bring plenty of water, energy snacks, a repair kit for your bike, a first-aid kit, and appropriate protective gear. A GPS device with the route loaded is also highly recommended due to the varied terrain and potential for technical sections.

Yes, the climb towards Puerto de Casillas is described as a 'long and somewhat tedious climb on a track'. Additionally, the section leading to Portacho del Pozo is noted as the 'most strenuous part of the route', demanding significant effort and advanced riding skills.