Alto de Agiña and Aritxulegi Pass Loop

This challenging racebike route, covering approximately 53.3 km with significant elevation gain, typically takes around 3 hours and 8 minutes to complete. However, your actual time may vary depending on your fitness level and how often you stop to enjoy the views.

No, this route is rated as 'difficult' and is best suited for cyclists with a very good fitness level. It features two notable climbs, Collado de Aritxulegi and Alto Agiña, with average gradients often exceeding 6% and some sections reaching up to 12%.

As this is a circular route starting and ending in Irún, you can look for public parking options within the city. Specific parking details for cyclists are not provided, but Irún offers various parking facilities where you can leave your vehicle before beginning your ride.

The route features mostly well-paved surfaces, making it ideal for road bikes. Both the Collado de Aritxulegi and Alto Agiña climbs are known for good road conditions and very little traffic, especially on the ascents themselves. You'll encounter tight hairpin bends on Aritxulegi and looping hairpin bends on Alto Agiña.

You'll experience pleasant scenery with a mix of dense woodland, forest, and pastures. While some sections are primarily forested, the landscape opens up at various points, offering expansive views of the valley, particularly upon reaching the pass of Aritxulegi from Oiartzun, which is within the Aiako Harria Natural Park.

This route is accessible year-round. However, for the most comfortable experience, consider cycling during spring or autumn when temperatures are milder. Always check the weather forecast before you go, especially for conditions on the higher passes.

Key highlights include the challenging Ascent to Laza and Rifugio (Bentas), the unique Aritxulegi Tunnel (remember a light!), the serene Endara-San Anton Reservoir, and the iconic Alto de Agiña. You'll also ride along a scenic Concrete Path Through the Forest.

No, there are no specific permits or entrance fees required to cycle this route or to access the Aiako Harria Natural Park through which parts of the route pass. However, always respect local regulations and natural park guidelines.

This route is designed for racebiking on paved roads and involves significant climbs and descents. It is generally not considered suitable for cycling with dogs, especially given the challenging nature and potential for traffic, even if low.

Yes, this route intersects with several other paths. You'll find sections that overlap with trails like Bidasoko Bide Berdea / Vía Verde del Bidasoa, Senda Pirenaica - E37, and Arditurriko bidegorria, among others. This offers opportunities to explore further if you wish.

This route is notable for its connection to professional cycling; Alto Agiña has been featured as a climb in the prestigious Tour of the Basque Country stage race. This, combined with well-maintained, low-traffic roads, challenging climbs, and picturesque Basque Country scenery, makes it a highly regarded ride for enthusiasts.