The Oner Ultra Trail Run

Isle of Portland, United Kingdom • 6-7 Jun 2026

The ONER Ultra Trail Run

The ONER is a long distance coastal foot race along the Jurassic Coast. The route covers approximately 140KM (about 85 miles) and is intended to be completed within 30 hours. The event typically attracts around 100 runners and follows coastal footpath, beaches and tracks, including the full circumnavigation of Portland. The course crosses exposed cliff areas and includes sections run during hours of darkness. If access to parts of the planned route is restricted an alternative route such as an out and back may be used.

Event headquarters and registration are at Masonic Lodge Portland, Victoria Square, Portland, Dorset, DT5 1AL. Checkpoints are located at roughly 10 KM intervals. Each checkpoint logs times, offers energy bars, jelly babies, salty snacks, filled rolls, water, squash and coke; the halfway point serves hot food and the finish point offers hot homemade soup. Medical cover and event medics are available at checkpoints and at registration.

Entry fee is £210 and includes a GPS tracker, event branded t-shirt, food and drink at checkpoints, transport between the event HQ and the start and finish, a bespoke finisher medal, free parking at HQ, medical cover, on-course support and mini bus pick up for retired participants, and an event information pack.

Participants must carry mandatory kit including a means of navigation, actions on sheet, whistle, compass, waterproof top, long trousers or tights, gloves, hat, emergency nutrition, torch with spare batteries, more than 400 ml of drink, a lightweight warm layer, a charged mobile phone and a waterproofed notepad and pencil. Checkpoint cut off times enforce a minimum pace; runners outside the required pace will be asked to retire and will be transported back to HQ. Visit the organization's website for the most recent information.

Race information

140 km
The Oner
85 mi
The Oner 85 Miler
Visit the organization's website for the most recent information.
Trail runs nearby

An obstacle 5k at Baiter Park in Poole on 30 May 2026, the Pretty Muddy event combines climbing, crawling and sliding while raising funds for Cancer Research UK. Waves run every 15 minutes and participants must be 13 or older.

Midweek chip timed trail races at the Blue Pool nature reserve in Dorset with 7 mile and 3 mile routes through woodland and ridge views. Race entry includes access for one adult and up to two children.

Water themed trail running on the Isle of Purbeck with four single lap distances from half marathon to 54k. Routes run along coastal cliffs and Purbeck hills and include well stocked aid stations and GPX navigation advice.

A trail running event at Wilkswood Farm near Swanage with 23 km, 13 km and 7 km routes along the Jurassic Coast. The courses include rocky technical sections, outposts on the longer routes and a reusable cup policy.

Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.