Fuelling, hydration & pacing for ultras

Get your fuel, salts and pace right, all the way to the line.

Sub24 plans your carbs, fluid, sodium and caffeine hour by hour, paces you over every climb and descent (not just the flat bits), and keeps your aid stations, drop bags and crew in sync. Chasing a sub-24 finish is one goal it can help with, mostly it just gets you to the line in one piece.

Not invited yet? Join the waitlist →
Crew join by share link, no account needed.
Pace the real route

Ultra Scotland 50

91 km2,477 m climb6 crew points

Every climb and descent modelled from the real GPX, with a pace for each leg and your aid stations and crew points marked. Hover the line to read it off.

Aid 3 · Sanquhar42 km
80g carbs/hr
500ml fluid/hr
700mg sodium/hr
200mg caffeine
3× Energy gel1 gel · 22 g carbs
66g carbs · 90mg sodium · 0ml fluid
2× Drink mix 320500 ml bottle
80g carbs · 600mg sodium · 1000ml fluid
1× Caffeine gel1 gel · 100 mg
22g carbs · 40mg sodium · 0ml fluid · 100mg caffeine
1× Salt cap1 capsule
0g carbs · 300mg sodium · 0ml fluid
Fuelling & hydration

Carbs, salt, caffeine

Hourly carbs, fluid, sodium and caffeine, turned into exactly what to eat and drink at each aid station.

Poleskeoch Bothy28 km · ETA 11:40
crewdrop bag
Sanquhar Town Hall42 km · ETA 13:55
crew
Wanlockhead55 km · ETA 16:10
crewdrop bag
Aid, drop bags & crew

Everyone in sync

What's at each aid station, where your drop bags are, and when your crew need to be there.

ON TRACK82
Race readiness

Know you're ready

One honest number that folds in your training, the route's climbs, and your fuelling plan.

Route data is real (Ultra Scotland 50); other figures are illustrative.

How it works
1

Add your race

Drop a GPX or search the route. We read the climbs, distance, cutoffs and aid stations.

2

Get your plan

An hour-by-hour fuelling and hydration plan, plus a pace for every climb and descent.

3

Run it with your crew

Tick off aid stations, watch the buffer, and share a live sheet with your crew and pacers.

Your next ultra, planned today

A couple of minutes to add a race and see your fuelling, hydration and pacing plan.

Not invited yet? Join the waitlist →
Sub24, the coach and crew in your pocket