Desafío Ultra El Cainejo

Saturday, May 23, 2026

Desafío Ultra 52K

52km D+ 5500m

Cainejo 35K

35.7km D+ 3200m

Cainejín 19K

19.5km D+ 1800m

Desafío Ultra El Cainejo 2026: Registration

Desafío Ultra El Cainejo is one of Spain's most technical and demanding trail races. Held in Caín de Valdeón (León), in the heart of Picos de Europa National Park, it offers three distances — 52K, 35K and 19K — along ancient shepherd paths through limestone channels, exposed sections with ropes and chains, and brutal elevation gains across the most vertical massifs of the Cantabrian Mountains.

Registration open

Registration opens: December 5, 2025

Registration closes: May 18, 2026

Entry fees by distance

Distance	Elevation	Price	Time limit
Desafío Ultra 52K 52K	5,500m D+	104 EUR	16h	Sign up
Cainejo 35K 35.7K	3,200m D+	72 EUR	12h	Sign up
Cainejín 19K 19.5K	1,800m D+	53 EUR	6h	Sign up

Registration timeline

Registration opens

Dec 5

→

Registration closes

May 18

How to register

1
Go to the official race website using the registration button.
2
Select the distance you want to run.
3
Fill in the form with your personal details and federation license (if required).
4
Complete the payment and save your registration confirmation.

What's included in your entry?

Race bib with timing chip, aid stations along the course, accident insurance during the race, access to finish line services (physiotherapy, showers, finisher meal) and an event t-shirt or memento.

Go to registration

Official website →

See full Pack 360 guide