Nightleg
For ultrarunners and the people who crew them

Know where your runner is. Know where you need to be.

We've got race-day logistics covered, so you and your crew can focus on getting you to the finish line. The crew sees when to be at the next stop, pacers see their handoff, and family follows along from home. It keeps working when the runner's phone doesn't.

Works on any phone today. Crew and family just open a link.

First race: Virginia Trail Running Festival 100, October 2026

Joel ran 100 miles. His phone went silent at mile 6.

The crew still knew when to be at every stop. This is what Nightleg did that day.

23:09
his finish, 51 minutes under a 24 hour goal
2 min
how close Nightleg's estimate was at mile 28, after four hours with no GPS
13
checkpoint times recorded across the race, 4 of them by GPS alone
3
pacers through the night, every handoff planned in Nightleg
7:00 AM, mile 6

The phone stops reporting. A dot on a map would just freeze. Nightleg said so plainly and started estimating from his pace.

11:19 AM, mile 28

"Probably at Aid Station 5." The crew logged him in at 11:21. Every later ETA tightened around that real time.

Afternoon

He slowed, and Nightleg slowed with him. It projects from the most recent stretch run, not the morning's average, so the times the crew drove to stayed believable.

How it works

Set up in an evening. Share two links.

1

Add your race

Upload the course GPX from the race website and the aid stations fill themselves in. Set your goal, planned stops and who is pacing which stretch.

2

Invite your people

One link for crew and pacers, one read-only link for family. Nobody creates an account or installs anything to follow along.

3

Run

Your phone reports from your pocket. Nightleg checks you in at aid stations by GPS, updates every ETA, and tells the crew where to drive next.

Built for where races actually happen

No signal is the normal case, not the edge case.

Honest estimates when GPS goes quiet

Nightleg walks the runner down the course at the pace they were holding, waits the planned minutes at each aid station, and labels every number that is a guess.

Nobody has to log anything

Crews miss stops and forget to tap. Position, next stop and ETAs work from GPS when there is any and from the clock when there isn't. A logged time is a correction, never a requirement.

A pacer's phone counts

When a pacer is running their stretch, their phone can stand in for the runner's, so tracking picks back up at the handoff.

Made for tired people on phones

Big buttons, directions to the right parking spot, the next crew stop always on top. It keeps opening when signal drops and sends what you logged once it's back.

Coming to iPhone · in testing

Race day, in your pocket.

Open Nightleg and you know three things at a glance: where your runner is, when they'll reach your stop, and how to drive there. It tracks from the runner's pocket with the phone locked, checks them in at every aid station on its own, and taps the crew on the shoulder when it's time to move.

A map that says what it knowsReal position when there is one, a marked estimate when there isn't.
Tracking built inOne switch on the runner's phone, and a check days before the race that it works.
Alerts when it's time to moveThe crew doesn't have to watch a screen all day to catch the ten minutes that matter.

These screens are a preview. The iPhone app is in testing; until it ships, your crew opens Nightleg from a link.

For everyone who can't be on the course

Family follows every mile. Your runner hears them.

A 100-miler is a long day to spend refreshing a text thread. Family gets their own link, and a way to be part of the race from the couch.

Their own view of the race

Where the runner is, the next aid station and the projected finish, updating on its own. The family link is read-only, so nobody at home can change the plan by accident.

Cheers from anywhere

Family and friends send cheers that the crew and pacers see right away and can read out at the next stop. The crew can reply, so home hears back.

A voice at mile 70

Record a voice note for a chosen aid station. When the runner gets there, the crew or pacer plays it. It lands when it's needed most, in the middle of the night.

Photos from the course

The crew posts photos from the aid stations as the day goes, so family sees the race and not just a dot. Afterwards there's a recap of the whole run to share.

Pricing

One race, or the whole year.

You pay when you set a race up. Your crew, pacers and family never pay and never need an account.

One race
Race
$29
per race
  • Live tracking for crew, pacers and family
  • Course map, ETAs and crew stop directions
  • Tracking from the runner's phone
  • Cheers and voice notes from home
  • A recap page to share afterwards
  • The Nightleg app and alerts, when they ship
Set up your race
More than two races this year?
Year
$59
one payment, 12 months
  • Everything in Race
  • Every race you set up for a year
  • Keep each race's recap and stats in one place
Set up your race
Add-on · coming soon
Satellite tracker
+ $89
per race, added at checkout
  • A satellite tracker shipped to you, already linked to your race
  • Reports with no cell signal at all
  • Send it back after the race. A refundable hold covers the tracker until it's home
In testing now. Not available to order yet.

Running a relay? A relay version, with legs, runner rotation and van exchanges, is next. It grew out of the one we ran at a 200-mile relay.

Questions

What people ask first

Who needs to install something?

Only the people who run: the runner and each pacer, so Nightleg can track them on the course from their pocket. Crew who are driving and family at home just open a link, and it can be added to a phone's home screen.

What do the runner and pacers need?

Something that reports where they are: the Nightleg app for iPhone, which tracks from a pocket with the screen locked (in testing now), or a satellite tracker such as a Garmin inReach or a SPOT linked to the race. A pacer's phone covers their stretch of the course, so the runner is still tracked if their own phone dies.

What happens when there's no cell service?

The phone keeps recording and sends its points when service returns. In between, Nightleg estimates from the runner's pace and says clearly that it is estimating. Satellite tracker support is in testing for races with no service at all.

Who can see where the runner is?

Only people you give a link to. The family link is read-only and never shows location history. A public recap page exists only if you choose to publish it, and it carries no map and no names but the runner's.

Is this a safety device?

No. Nightleg helps a crew plan and follow a race. It is not an emergency service and can't call for help. Carry what your race requires.

Got a race on the calendar?

Set your race up tonight and send your crew the link.