Backyard Ultra Live

Course

The Mackyard x 4ZERO Ultra

A 6.72 km loop, near enough the standard yard, with about 26 m of climb in it and almost nothing in the way of altitude — the whole course lives between 103 and 118 metres.

The Mackyard x 4ZERO Ultra loopA 6.72 kilometre loop drawn from its GPX, with the start and finish marked at the same point.S/F
The loop as the app draws it — a schematic trace from the course's own GPX, not a basemap. Start and finish are the same point.
Course at a glance
Lap distance6.72 km · 4.17 miles
Climb per lapabout 26 m
Low / high103 m / 118 m
ShapeClosed loop, start and finish together
24 yards161 km · 100 miles
Cut-off pace8:56 / km · 14:23 / mile

The profile

Fifteen metres of spread across nearly seven kilometres. This is a fast, flat course where lap times will be decided by legs and weather rather than by terrain.

Elevation profile of the Mackyard loopThe loop rises and falls across a fifteen metre spread between 103 and 118 metres, shown against a 60 metre minimum range so flat ground reads as flat.103 M118 M
Drawn against a 60 m minimum range. Normalised to its own high and low this profile would fill the card and look like a mountain stage — which is exactly the trap the floor exists to avoid.

What a lap earns you here

On an hourly cut-off, over 6.72 km:

Lap time, pace and rest on this course
Lapmin/km min/mileRest
44:006:3310:3316:00
46:006:5111:0214:00
48:007:0911:3112:00
50:007:2611:5910:00
52:007:4412:288:00
54:008:0212:576:00

Run the numbers for any lap time with the calculator.

Racing it

Import the course GPX into Backyard Ultra Live and the app measures this loop rather than assuming the standard yard, draws your position on the trace above, and puts your buffer against the hour on one screen. Your crew can follow from a link or a four-digit code.

Distance and climb are measured from the course GPX and may differ slightly from the race's own published figures. Underlying map data © OpenStreetMap contributors.