Ultra Marathon Introduction
Move beyond the marathon distance. An introduction to ultra running — covering 50K training principles, gear, nutrition, and mindset.
Overview
An ultra marathon is any race longer than 26.2 miles (42.2 km). The most common entry-level distance is 50K (31 miles) — just 5 miles further than a marathon, but a completely different experience. Ultra running isn't about speed — it's about endurance, problem-solving, and resilience.
Golden Rule: In an ultra, the race doesn't start until the marathon distance. Everything before that is a warm-up.
Are You Ready?
Before attempting an ultra, you should be able to tick most of these:
| Prerequisite | Why |
|---|---|
| Completed at least one marathon | You need to know what 42 km feels like |
| Comfortable running 50+ km per week | Your body needs to handle the mileage |
| Experience with back-to-back long runs | Ultras require running on tired legs |
| Good nutrition and fuelling strategy | You'll be eating and drinking for hours |
| Mental resilience | There will be low points — you need to push through them |
Ultra Distances
| Distance | Miles | Typical Finish Time (First-Timer) | Notes |
|---|---|---|---|
| 50K | 31 mi | 5–7 hours | Great first ultra — only 9 km further than a marathon |
| 50 miles | 50 mi | 9–14 hours | A proper test of endurance |
| 100K | 62 mi | 12–20 hours | Serious undertaking — requires night running |
| 100 miles | 100 mi | 24–36 hours | The pinnacle — requires sleep strategy and crew |
The rest of this plan is for supporters
You’ve read the overview. The full Advanced programme — the week-by-week schedule, the sessions, the progressions and the numbers — unlocks with an access code, from £0.67 a month. Every Beginner and Intermediate guide on the site stays free.