Ultra Running Hub Cut-off calculator
A time limit is a pace in disguise. Enter a distance and a cut-off to see what the clock actually asks for — and how that compares with 1,649 real limits we hold in the same distance category.
What other races allow
Every published cut-off we hold, grouped by distance category. Timed and backyard events are left out — their limit is the event rather than a target — as are races whose distance was never published. The spread inside a single category is the point: two 50Ks can ask for paces an hour apart over the same course length.
| Distance | Races | Tightest 10% | Median | Most generous 10% |
|---|---|---|---|---|
| Marathon | 43 | 9:20 | 12:16 | 18:40 |
| 50K | 926 | 9:14 | 12:00 | 17:00 |
| 50 mi | 436 | 8:51 | 11:15 | 15:35 |
| 100K | 201 | 7:12 | 10:11 | 14:24 |
| 100 mi | 30 | 5:13 | 11:47 | 17:53 |
| 200 mi + | 13 | 12:00 | 14:20 | 17:42 |
Paces are minutes per kilometre of the whole course — the average a runner must hold from the gun, including every aid station, every climb and every stop. Climbing is not in this number: on a mountain course the same pace is a far harder day. The columns are the 10th, 50th and 90th percentile rather than the extremes, because a handful of stored limits disagree with their own distance and the extremes are where they sit. Browse races to see each one's limit beside its terrain.