← 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.
Projected finish
28:21:00
Even effort · incl. 21:00 rest
Pace
11:25
avg/km
GAP
10:33
flat-equiv/km
VAM
239m
/hr on climbs
Pacing splits · Even effort
SectionLengthTarget paceVAMVertGAPElapsed
0m3.1km3.1km11:34/km83m/hr+49m10:33/km35:35
3.1km11.0km7.9km11:39/km44m/hr+68m10:33/km2:07:30
11.0km13.6km2.6km14:56/km251m/hr+165m10:33/km2:46:52
13.6km18.2km4.6km11:29/km40m/hr+35m10:33/km3:39:54
18.2km21.3km3.0km8:51/km−195m10:33/km4:06:55
1Llanberis
Arrive4:06:55 10:06 AM
Rest
3min
Leave4:09:55 10:09 AM
No cutoff
21.3km24.3km3.0km16:57/km310m/hr+266m10:33/km5:01:29
24.3km28.4km4.1km8:06/km−246m10:33/km5:34:44
28.4km36.9km8.5km11:28/km10:33/km7:12:08
2Nantlle
Arrive7:12:08 1:12 PM
Rest
3min
Leave7:15:08 1:15 PM
No cutoff
36.9km52.6km15.8km10:55/km−10m10:33/km10:07:24
52.6km55.3km2.6km9:25/km−70m10:33/km10:32:22
3Beddgelert
Arrive10:32:22 4:32 PM
Rest
3min
Leave10:35:22 4:35 PM
No cutoff
55.3km65.8km10.5km14:22/km182m/hr+457m10:33/km13:05:56
65.8km78.1km12.4km9:44/km−438m10:33/km15:09:12
4Blaenau Ffestiniog
Arrive14:24:06 8:24 PM
Rest
3min
Leave14:27:06 8:27 PM
No cutoff
78.1km92.0km13.9km13:36/km135m/hr+426m10:33/km18:18:34
5Cwm Penmachno
Arrive18:18:34 12:18 AM +1d
Rest
3min
Leave18:21:34 12:21 AM +1d
No cutoff
92.0km96.7km4.6km9:23/km−248m10:33/km19:05:12
96.7km105.4km8.7km10:32/km−116m10:33/km20:36:51
105.4km109.6km4.2km9:51/km−100m10:33/km21:18:26
6Betws-y-Coed
Arrive21:18:26 3:18 AM +1d
Rest
3min
Leave21:21:26 3:21 AM +1d
No cutoff
109.6km116.7km7.2km13:57/km160m/hr+267m10:33/km23:01:28
116.7km123.3km6.6km11:02/km6m/hr+7m10:33/km24:14:16
7Gwern Gof Uchaf (Ogwen Valley)
Arrive24:14:16 6:14 AM +1d
Rest
3min
Leave24:17:16 6:17 AM +1d
No cutoff
123.3km138.2km14.8km10:45/km−63m10:33/km26:56:53
138.2km143.9km5.8km9:23/km−180m10:33/km27:50:56
143.9km147.0km3.1km9:47/km−49m10:33/km28:21:00

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.