Trelly is a multi-stage trail run adventure with a social twist. Over the course of 3 days you will cover a total distance of 100 km up to 100 miles. We will provide 2 or 3 options daily and after a group start, it will be up to you to pick your pace and be smart regarding your own supplies as we promote the Trelly as a self-supported event.
Is it a race ? Not really … Is it a challenge? Yes, sure!

Start: September 11th, 2026 - ~9 a.m.

Finish: September 13th, 2026 - ~3:00/4:00 p.m.

Start / Finish location: Vianden, 9401 Luxemburg (To be confirmed).

Day distances will vary between 30 & 65 km/day, to reach a total of ~100 to 160 km after 3 days.

Limited # Spots: with a small group, there is more flexibility, more social interaction, ... and we like that! We aim for around 20 participants.

Cost: 175 - 250€, depending on sleeping option etc ... We ask for an advance of 150€, which will be non-refundable ( bookings and costs made upfront)

Grelly 26

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Tickets

Grelly '26 - DUO - 3 days

Grelly '26 - SOLO - 3 Days

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