Ultra · trail · skyrunning

The mountain demands
a plan.

Upload your course GPX and instantly generate a complete race strategy. We calculate terrain-adjusted pacing, personalized fueling schedules, and drop bag logistics — before you cross the start line.

How we calculate
NO ACCOUNT · FULL ANALYSIS OF ANY RACE
Finish forecast
Zegama-Aizkorri · 42.2 km · 2,736 D+
5:356:12
80% confidence interval
UTMB 171K -12 min vs planZEGAMA 42K ±0:48 on splitsELBRUS SKYRACE negative splitMADEIRA 115K drop bags on planTRANSVULCANIA aid ETAs ±2 min4,812 RACES ANALYZED
Preparation is a discipline
06 TOOLS

Everything you can plan before the start line — in one place. No spreadsheets, no screenshots of the race rules buried in your camera roll.

01
Rules & checkpoints

Aid stations, intermediate cutoffs, and the overall time limit — laid out along the distance, not buried in a 40-page PDF.

02
Fuel & drop bags

Gels, water, drop bags — tied to your ETA at every aid station. Carbs per hour, not guesswork.

03
Mandatory kit

A checklist built from this specific race's rules. Zero surprises at gear check.

04
Races worldwide

A database of races with profiles, terrain, and rules — pick your next start from data.

05
Course plan

Segments, grade and surface — pace computed for every climb and descent.

06
Watch widgets

Garmin: planned pace, distance to the next aid station, and your gap to plan — right on your wrist.

Pacevine live pacing screen on a Garmin watch
Suunto Vertical 2 watch — coming soon on Pacevine
HOVER — SWITCH PLATFORM
Garmin widget · Suunto soon
The plan runs with you — on your wrist

The course is split into climb, descent, and runnable flat segments, each with its own grade and surface. The screen always shows six key metrics:

PACE · TARGET
5:45 / 6:41
HEART RATE
147 BPM
GRADE
2%
TO NEXT AID
0.54 KM
VERT TO NEXT
12 M
FINISH · ETA
11:02

Plus a plan for every checkpoint from the race rules: what to eat, what to grab from your drop bag, how many minutes to stop — your watch reminds you when you get there.

Finish forecast
Finish isn't hope. It's a calculation.

The model accounts for how every percent of grade affects pace, the surface type, and the fatigue drift in the late kilometers. The forecast isn't one number — it's a confidence interval that narrows as the race goes on. And crucially: the model reads your own past races and training — the forecast is calibrated to your profile, not an "average runner."

GRADESURFACEFATIGUEYOUR TRACKS±4.1% MEDIAN ERROR
Zegama-Aizkorri · 42.2 km · 2,736 D+ · 26 segments
5:52median
5:3580% confidence interval6:12

Recalculated at every checkpoint — on this course (Zegama), the window is already ±6 minutes by km 30.

On an ultra, one mistake costs more
CANCEL ANYTIME · NO FINE PRINT
Free
$0
Full course analysis
Segments, grade, forecast
No account needed
Racer Pro
$5.99/mo
$71.88 billed once a year
All races this season · watch widgets
Checkpoint plan, fuel and drop bags
Kit checklist from race rules
One race
$13.99
Everything in Pro — for one start
Lifetime access to this plan
No subscription
Your next race already has a plan.
GPX → plan → watch. Start free.