About

Ultramarathon Database is a work in progress. Information about these races lives all over the place: organiser sites, timing platforms, old forum threads. Some of it is out of date, some of it is just wrong. This site is an attempt to get it right in one place, with data: dates, courses, cutoffs, results, live coverage on race weekends. Where we can't back a number with a real source, we leave it blank.

There is also a lot buried in results that nobody has really dug into. What heat does to finish rates. What happens to times when a course gets rerouted. How fields have changed over twenty years. We're slowly working on studies and deeper write-ups built on this data.

If something looks wrong, if a race you care about is missing, if you have an idea worth chasing, or if you want to work together on any of this, write to ultramarathondatabase@agentmail.to.