Col de Portet d'Aspet and Col de Larrieu Loop

This route is rated as difficult for racebiking. It features significant climbs, including the classic Tour de France ascent of Portet-d'Aspet pass, which has sections up to 15-17% gradient, especially in its final 4km from Aspet. The descent from Portet d'Aspet towards Aspet is also known to be quite dangerous with tight hairpins and shaded woods.

The route takes you over two notable mountain passes: the historic Portet-d'Aspet pass and Col de Larrieu (704 m). While the climbs themselves offer pleasant forested scenery, spectacular panoramic views are somewhat limited, even at the summits. You'll also pass the Pont Vieux de Saint-Girons. A significant landmark on the Portet d'Aspet descent (4km from the summit on the Aspet side) is the memorial to cyclist Fabio Casartelli.

While specific parking areas aren't detailed, common starting points for routes incorporating these cols include towns like Aspet or Salies-du-Salat. Look for public parking in these villages, which serve as good bases for exploring the area.

The best time to cycle this route is generally during the warmer months, from late spring to early autumn. Be aware that summer resurfacing on the Portet-d'Aspet pass can lead to patches of loose gravel, which requires extra caution, especially on descents.

Given its difficult rating, significant elevation gain (1339m), and challenging gradients (up to 17% on Portet d'Aspet), this route is generally not recommended for beginners or families with young children. It's best suited for experienced road cyclists looking for a demanding ride.

As this is primarily a road cycling route on public roads, dogs are generally permitted. However, they must be kept under control and on a leash if you stop in populated areas or near livestock. Always be mindful of local regulations and other road users.

Yes, sections of this route overlap with several other paths. Notably, it covers about 13% of the Véloroute du Piémont Pyrénéen 05 (Roquefort-sur-Garonne - Saint-Lizier), 9% of the Chemin du Piémont Pyrénéen, and 3% of the Ancienne Ligne de Chemin de Fer Boussens - Saint-Girons.

No, there are no specific permits or entrance fees required to cycle this route. The trail is located within the Parc naturel régional des Pyrénées ariégeoises, which is a protected area. While there are no fees, visitors are expected to respect the natural environment and local regulations, such as staying on marked paths and not disturbing wildlife.

The road surface is generally good, but summer resurfacing can occasionally leave patches of loose gravel, particularly on the Portet-d'Aspet pass. Traffic is typically light, but always remain vigilant, especially on descents which can be dangerous with tight hairpins and shaded sections.

The route passes through or near several small towns and villages, such as Aspet and Saint-Girons. These places typically offer cafes, restaurants, and various accommodation options where you can refuel and rest. It's always a good idea to check opening hours, especially outside peak season.

The Portet-d'Aspet pass is known for its two-part ascent, particularly from the Aspet side. It starts calmly but becomes much more complicated, with the last 4km featuring long sections of double-digit gradients, some signed at up to 17%. This makes it a significant test of endurance and climbing ability.