Bizkaiko Bira Trail (GR 123)

This route is classified as a difficult or 'Hard run' and requires very good fitness due to its length of 20.1 kilometers and varied terrain. It's best suited for experienced joggers looking for a significant workout.

The route primarily features paved surfaces, offering a generally smooth experience for jogging. You'll be running along coastal and riverside landscapes, with extraordinary views around the mouth of the Nervión River.

The trail offers several notable sights. You'll start near the iconic Puente Bizkaia, a UNESCO World Heritage site. Other highlights include Evaristo Churruca Park, Ereaga Beach, Punta Galea Lighthouse, and the Graffiti Bunker at Liencres Cliffs.

As the route connects Portugalete and Getxo via the Puente Bizkaia, you can find parking in either town. Look for public parking areas near the bridge on either side to begin your run.

While specific regulations for this exact route are not detailed, many coastal paths in the region are dog-friendly, often requiring dogs to be on a leash. It's advisable to check local signage in Portugalete and Getxo for any specific restrictions.

No, there are no permits or entrance fees required to jog the Puente Bizkaia al Búnker route itself. Access to the general area and the paths is free. However, if you wish to ascend the panoramic walkway of the Puente Bizkaia, there is a separate fee.

The coastal nature of the route means it can be enjoyed for much of the year. Spring and autumn generally offer pleasant temperatures and fewer crowds. Summer can be warm, while winter might bring cooler, windier conditions, but the paved surfaces make it accessible.

Yes, the route intersects with several other paths. You will find yourself on sections of the Bizkaiko bira, Areetako kaia, and Azkorri bidea, among others, as you navigate the area.

You'll be treated to extraordinary views throughout your run. Expect panoramic vistas of the mouth of the Nervión River, the Port of Bilbao, the surrounding mountains, and the charming towns of Portugalete and Getxo.

The estimated duration for this 20.1-kilometer jogging route is approximately 2 hours and 11 minutes (7887 seconds), depending on your pace and any stops you make along the way.

Given its classification as a 'difficult' and 'Hard run' requiring 'very good fitness' due to its length, the full 20.1 km route is generally not recommended for jogging with children. Shorter, more accessible sections near the Puente Bizkaia or Ereaga Beach might be more suitable for families.