Start here
Every ultra starts somewhere.
A few clear answers, a race that fits, and a little practical preparation. Start with the question that brought you here.
The basics
How far is an ultramarathon?
An ultramarathon is longer than 42.195 km. Here is how 50K, 50 miles, 100K and 100 miles compare, and how to read a race distance without overlooking the terrain or format.
Read the guide02Your first race
How to choose your first ultramarathon.
Find a race you can prepare for, afford and look forward to. Compare the terrain, cutoffs and support, work through three real event examples, then build your own shortlist.
Read the guide03Choosing a race
How a place on the start list is actually won.
Open entry, a qualifier, a ballot and a charity bib are different doors. The examples are from organiser pages checked on 3 October 2026.
Read the guide04Training & preparation
Your first 50K: get the preparation straight.
Build a preparation plan around the course, your recent running and the time you have. Includes a race brief, practical rehearsals and a printable checklist for your first 50K.
Read the guide05Race formats
Ultra race formats: one long day, or several?
Compare continuous, stage, timed and backyard ultras. Understand what stops the clock, how support works and which questions matter before you choose a format.
Read the guide06Running for a cause
Volunteer before you think you understand the day.
Marshalling, aid stations and course sweeping are how a race stays standing. The jobs below are from organiser pages, and they are not the same as crewing a friend.
Read the guideMake it your own
A good race starts with a good fit.
Compare the course, the support and the practical details.