PaleoTrail Loarre 2026

In 2019 geologist and trail runner José Manuel Gasca was out running in the Sierra de Loarre when he came across dinosaur eggshell. The site, Santa Marina, turned out to hold more than 100 dinosaur eggs from the late Cretaceous, about 70 million years old. It led to a scientific project, a palaeontology lab in the village, and in 2025 a race along the route where it all began. The Paleotrail Loarre is back for its second edition on Saturday 14 November 2026.

Two routes, both through the castle

	Distance	Climb	Entry
Quebrantahuevos	21 km	+1,000 m	€30
Trepadinos	13 km	+600 m	€25

The names are puns: Quebrantahuevos (“egg-breaker”) plays on quebrantahuesos, the bearded vulture of the Pyrenees, and Trepadinos mixes trepar (to climb) with dinosaurs. Both routes pass through the inside of Loarre Castle, the Romanesque fortress above the village, which opens its doors for the race. Both also pass the Santa Marina egg site. The long route adds the summit of Puchilibro (1,596 m), and the terrain includes technical trails.

What the first edition was like

The 2025 debut drew more than 400 runners. Abraham Blánquez won the Quebrantahuevos in 1:54 and Ania Hernández in 2:14. The winners’ prizes were life-size chocolate dinosaur eggs made by the Ascaso pastry shop in Huesca.

Practical details

• Start: 9:00 in Loarre, a village of about 300 people.
• Entries: on RockTheSport until 7 November, with a Dorsal 0 option for donations.
• Organisers: the Laboratorio Paleontológico de Loarre and the Peña Guara mountain club, with Loarre town council.
• In 2025, runners also got free visits to the palaeontology lab and museum over the weekend.