Ultramarathon race-day command center
Your runner runs the race.You run the crew.
Ultra Crew Chief turns an ultramarathon plan into a live race-day command center for runners and the family and friends helping them finish — first 50K or fifth hundred.
Free during early access · No card needed · Crew never need an account
Crew view
Blackpine Ridge 55
Runner status
12 min behind plan
Left Miller's Bend (mile 23.6) at 11:42
Next crew stop
Foxglove Meadow · mile 35.5
- Expected
- 2:35 – 3:05 pm
- Cutoff
- 3:25 pm
- Margin
- +48 min
- Crew leaves
- 1:20 pm
9 Meadow Access Trail — roadside parking only
Have ready
- Refill bottles + cold drink
- Hot soup, salted potatoes
- Fresh socks and blister kit
- Headlamp charged
Estimates update as arrivals are recorded. Sample data.
The crew screen, on one phone, at the aid station.
Crewing is a job. This is the job sheet.
Know when your runner is coming
An arrival window for every checkpoint, built from the pace and stops you planned.
Know where the crew needs to be
Addresses, parking notes, drive times and the time the crew should leave for the next stop.
Know what to have ready
Checklists per checkpoint: bottles, food, socks, warm layers, headlamp before dark.
Know whether the runner is on schedule
Cutoff margin and ahead / on plan / behind, updated from real arrival times.
Adjust when race day goes sideways
Every recorded arrival re-times the rest of the race. Your original plan stays untouched beside it.
Every stop. Every minute.
Rest Stops Under Control
Every minute matters during an ultra. Ultra Crew Chief automatically tracks how long your runner spends at each rest stop, helping your crew stay on schedule without constantly watching the clock.
- Automatic count-up timer when your runner arrives.
- A large display your crew can read at a glance.
- Gentle yellow, orange and red alerts as stops run overtime.
- Warnings matched to each checkpoint’s planned stop duration.
- A final stop time when your runner departs.
Demo · Sample data
Willow Spring
Planned Stop: 5:00
On Schedule
How it works
Four steps to race morning
01
Enter the race
Distance, start time, checkpoints, cutoffs and which stops the crew can reach.
02
Build the plan
Running and walking pace, run/walk intervals, aid-station stop times, and slower paces for the back half.
03
Send crew links
Each crew member opens one link on their phone. No accounts, no training, no access to your setup.
04
Run race day
Tap Arrived and Departed. Everything downstream re-times itself, with or without signal.
Built for dead zones
Once a race has been opened, the plan, addresses and checklists stay readable offline. Taps are saved on the phone and sync when signal returns.
One link per crew member
Everyone sees the same updates as they happen. Revoke a link any time — it stops working immediately.
Facts, not advice
Times, distances, margins and the notes your crew record. No coaching conclusions and no medical interpretation.
Give your crew a plan they can actually follow
Set up your race in a few minutes, or load the demo 55-miler and look around first.