← All races147km mountain ultra
Slate Trail Ultra Pacing Calculator
A run through the abandoned quarries of Snowdonia, eight stations, thirty-six hours.
Distance
147 km / 91 mi
147km
Total climb
3900m
official D+
Total descent
3900m
official D−
High / low
518m
low 6m
200m400m
Llanberis
Nantlle
Beddgelert
Blaenau Ffestiniog
Cwm Penmachno
Betws-y-Coed
Gwern Gof Uchaf (Ogwen Valley)
0km25km50km75km100km125km147.0km
Your goal
Goal type
:
hrsmin
Pacing strategy
Constant effort start to finish.
Pacing splits · Even effort
| Section | Length | Target pace | VAM | Vert | GAP | Elapsed |
|---|---|---|---|---|---|---|
| 0m–3.1km | 3.1km | 11:34/km | 83m/hr | +49m | 10:33/km | 35:35 |
| 3.1km–11.0km | 7.9km | 11:39/km | 44m/hr | +68m | 10:33/km | 2:07:30 |
| 11.0km–13.6km | 2.6km | 14:56/km | 251m/hr | +165m | 10:33/km | 2:46:52 |
| 13.6km–18.2km | 4.6km | 11:29/km | 40m/hr | +35m | 10:33/km | 3:39:54 |
| 18.2km–21.3km | 3.0km | 8:51/km | — | −195m | 10:33/km | 4:06:55 |
1Llanberis Arrive4:06:55☀ 10:06 AM Rest 3min Leave4:09:55☀ 10:09 AM No cutoff | ||||||
| 21.3km–24.3km | 3.0km | 16:57/km | 310m/hr | +266m | 10:33/km | 5:01:29 |
| 24.3km–28.4km | 4.1km | 8:06/km | — | −246m | 10:33/km | 5:34:44 |
| 28.4km–36.9km | 8.5km | 11:28/km | — | — | 10:33/km | 7:12:08 |
2Nantlle Arrive7:12:08☀ 1:12 PM Rest 3min Leave7:15:08☀ 1:15 PM No cutoff | ||||||
| 36.9km–52.6km | 15.8km | 10:55/km | — | −10m | 10:33/km | 10:07:24 |
| 52.6km–55.3km | 2.6km | 9:25/km | — | −70m | 10:33/km | 10:32:22 |
3Beddgelert Arrive10:32:22☀ 4:32 PM Rest 3min Leave10:35:22☀ 4:35 PM No cutoff | ||||||
| 55.3km–65.8km | 10.5km | 14:22/km | 182m/hr | +457m | 10:33/km | 13:05:56 |
| 65.8km–78.1km | 12.4km | 9:44/km | — | −438m | 10:33/km | 15:09:12 |
4Blaenau Ffestiniog Arrive14:24:06☀ 8:24 PM Rest 3min Leave14:27:06☀ 8:27 PM No cutoff | ||||||
| 78.1km–92.0km | 13.9km | 13:36/km | 135m/hr | +426m | 10:33/km | 18:18:34 |
5Cwm Penmachno Arrive18:18:34☾ 12:18 AM +1d Rest 3min Leave18:21:34☾ 12:21 AM +1d No cutoff | ||||||
| 92.0km–96.7km | 4.6km | 9:23/km | — | −248m | 10:33/km | 19:05:12 |
| 96.7km–105.4km | 8.7km | 10:32/km | — | −116m | 10:33/km | 20:36:51 |
| 105.4km–109.6km | 4.2km | 9:51/km | — | −100m | 10:33/km | 21:18:26 |
6Betws-y-Coed Arrive21:18:26☾ 3:18 AM +1d Rest 3min Leave21:21:26☾ 3:21 AM +1d No cutoff | ||||||
| 109.6km–116.7km | 7.2km | 13:57/km | 160m/hr | +267m | 10:33/km | 23:01:28 |
| 116.7km–123.3km | 6.6km | 11:02/km | 6m/hr | +7m | 10:33/km | 24:14:16 |
7Gwern Gof Uchaf (Ogwen Valley) Arrive24:14:16☀ 6:14 AM +1d Rest 3min Leave24:17:16☀ 6:17 AM +1d No cutoff | ||||||
| 123.3km–138.2km | 14.8km | 10:45/km | — | −63m | 10:33/km | 26:56:53 |
| 138.2km–143.9km | 5.8km | 9:23/km | — | −180m | 10:33/km | 27:50:56 |
| 143.9km–147.0km | 3.1km | 9:47/km | — | −49m | 10:33/km | 28:21:00 |
GAP is grade-adjusted pace, the flat-equivalent pace for the effort. On an even-effort plan it stays roughly constant while your actual target pace rises on climbs and falls on descents. Switch to “By terrain” to pace the course by its climbs and descents. The highlighted rows are aid stations: edit your rest with the ± steppers and every arrival, departure and the 21:00 of total stopped time folds into the elapsed clock. The cutoff badge shows your buffer against the official cutoff at arrival. The ☀/☾ is the wall-clock hour from the official 6:00 AM start, so you know when to expect a headlamp.