A 48-mile anti-clockwise lap of Jersey’s coastline, starting and finishing in St Helier.
Round the Rock begins at the Steam Clock in St Helier and follows Jersey’s coastline anti-clockwise through the east, north, west and south of the island before returning to the shared finish in St Helier.
The opening miles follow flatter roads and coastal paths through Havre des Pas, Gorey and St Catherine’s. From there, the course moves onto Jersey’s rugged north coast, with steep cliff paths, steps, technical sections and long stretches between road access points.
After reaching Les Fontaines, runners continue past Grosnez and across the west of the island before joining the south coast for the final miles through St Brelade, St Aubin and back into St Helier.
The route is marked at junctions and decision points rather than continuously. Long, obvious sections may have no markings, so every runner must carry the route on a suitable watch or phone.
Read about the race ethos →The Ultra follows Jersey’s coastline anti-clockwise. Keep the sea on your right for most of the course and use the GPX alongside the race markings.
Checkpoints are deliberately simple and practical. They supplement what you carry rather than replacing your own race nutrition and hydration plan.
The first checkpoint is reached after the flatter opening section through Jersey’s east.
The halfway checkpoint and mandatory Ultra cut-off point.
Positioned near Jersey’s north-west corner before the route moves towards St Ouen’s Bay.
The final checkpoint before the last coastal section towards St Aubin and St Helier.
Carry a reusable cup, bottle or suitable drinking vessel. Disposable cups are not provided.
Bring your own supplies if you need particular products or have dietary requirements.
The race is solo and self-supported. Pacers, crews and outside assistance are not permitted.
Round the Rock is a grassroots event organised by a very small team and supported by local volunteers. Please understand what the race provides — and what it does not — before entering.
The kit is there to protect you if you become injured, cold or unable to continue. Random or visual kit checks may take place. No kit means no start.
Abuse or aggression towards volunteers, race staff, members of the public or other runners will result in disqualification and may lead to exclusion from future events.
If you value grit over glamour, challenge over comfort and community over corporate gloss, you should fit right in.
The key Ultra details are below. The Race Day Information page remains the definitive source for the latest operational information.
Read the full Race Day Information →Jersey’s cliff paths can be narrow, exposed, technical and slippery. Adjust your pace to the conditions and overtake only where it is safe.
Withdraw at a checkpoint wherever possible and always tell race staff. Do not leave the course without informing the event team. Transport may not be immediate, and runners may need to wait until checkpoint operations allow collection.
The Marathon and Half Marathon follow later sections of the same coastal route and share the finish in St Helier.
Round the Rock Ultra returns on Saturday 31 July 2027.
Questions not covered on the Race Day Information page? Email Paul.
