Welcome to the Ultrarunning World UK & Ireland Ultrarunning Calendar 2018.
If you would like to add your UK or Ireland ultramarathon event please go to the Add Event page and fill in your events details.
For non-UK & Ireland ultramarathons please add to the Multidays.com calendar.
No events shorter than 27 miles in a single stage.
No events shorter than 6 hours in duration.
If you would like to advertise on the site please use the contact form.