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 1,856 real limits we hold in the same distance category.
10:40 min / km
17:10 min / mile
Tight
Tighter than 87% of Marathon races. (46 races)
A cut-off this firm is made or missed in training — see the Marathon plan →
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 | 46 | 9:20 | 12:00 | 18:40 |
| 50K | 1047 | 9:08 | 12:00 | 17:53 |
| 50 mi | 474 | 8:58 | 11:15 | 15:41 |
| 100K | 225 | 7:12 | 10:12 | 15:00 |
| 100 mi | 45 | 5:13 | 11:56 | 17:53 |
| 200 mi + | 19 | 10:04 | 14:10 | 18:38 |
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.