555 - Isles of Scilly

555 - Isles of Scilly, 4–8 October 2026

The 555 is a multi-day trail running event across the Isles of Scilly that takes place from 4 to 8 October 2026. It offers entrants the choice to run on a single day or across all five days, with each day held on a different island. The islands included are St Martin’s, Tresco, Bryher, St Agnes and St Mary’s; the final running order may change because of weather.

Distances available

• Marathon on each island, total 211 km
• Half Marathon on each island, total 106 km
• Island Loop single loop per island, approx total 55 km

Each day uses clearly marked island loops. The event provides a dry indoor venue on each island for start and finish, with access to toilets, hot and cold water, and shelter. Entrant tickets include daily boat transfers to and from each island; transfers do not include spectators. Participants who register for all five days receive a framed jigsaw background for their medals, with an optional upgrade to a personalised engraved frame, and free celebratory food at the after party.

Pricing is tiered: early bird, standard, and late entry rates apply per day or for all five days. Registration for the event is open and closes on Thursday, October 8, 2026. Current registration numbers are shown on the event page. Visit the organization's website for the most recent information.