// Proven in the Field

Built for the Hardest Races.
Proven at 200 Miles.

Four days and nights, five events, two loop lengths, aid stations miles from the finish — every lap timed and every runner live on the web, start to finish.

200 mi
Longest race timed, every lap live from the first step to the last
100 hrs
Of continuous live timing in a single race
7,570
Race miles timed at one event
766
Aid-station check-ins from volunteers' phones in one race
6
Events running side by side in one race, each with its own start, cutoff and places
48 hr
Fixed-time loops, with 12 and 24 hour events running alongside
161 mi
Covered by a 48-hour winner, every lap on the board
72:35
Winning 200-mile time, tracked start to finish

Oct 28 – Nov 1, 2026 · 100 hours

Dia De Los Muertos Ultramarathon

Machete Trail Madness · Lake Perris, CA

164Entrants
5Events
7,570Miles timed
3Aid stations
  • 10M to 200M in one race — five events, two loop lengths (10 and 20 mile), staggered starts two days apart.
  • Aid stations on volunteers' phones — no extra hardware. Crews saw "last seen at" for every runner.
  • Ran through the time change — the clock fell back mid-race; every time stayed correct.
  • TV runner board at the start/finish showed each crossing as it happened.
See the results →

Oct 22 – 24, 2026 · 50 hours

Weekend at Burney

Intermountain Endurance · Cassel, CA

57Entrants
6Events
2,075Miles timed
451Laps
  • Six events on one 4.6-mile loop — 48, 24 and 12 hour, a 4.6-mile race, and 12-hour and 4.6-mile burro divisions.
  • Every event on its own clock — each started on its own gun, with its own time limit and its own overall, gender and age-group places.
  • Last loop counts — a loop started before the time limit was credited when it finished after, per the race director's rules.
  • Official results on UltraSignup — overall, gender and age-group places for every event, in their exact upload format.
See the results →

// Timing Solutions

Two Ways to Time.
Both Deliver Live Results.

Whether your event has chip infrastructure or you need a fast, flexible manual solution — Relentless Timing has you covered either way.

Automated

Chip Timing

RFID chip technology automatically captures split times as athletes cross timing mats at the start, checkpoints, and finish line. Zero manual entry — fully automated, fully accurate, built for high-volume events.

  • Automated RFID detection at timing mats
  • Instant time capture at every checkpoint
  • Handles hundreds of simultaneous finishers
  • Start-line and finish-line splits
  • Guntime and chiptime both recorded
  • Live results push the moment chips are read
Flexible

Manual Bib Tracking App

Our mobile and tablet app lets volunteers at any checkpoint enter a bib number and instantly log the athlete's split time. Perfect for loop races, backyard ultras, and aid-station check-ins where chip infrastructure isn't practical.

  • Pre-load all athlete names & bib numbers before race day
  • Volunteer scans or types bib — time is auto-stamped
  • Works from any phone or tablet, no special hardware
  • Multiple checkpoints running simultaneously
  • Results go live instantly as bibs are entered
  • Perfect for loop, backyard ultra, and multi-aid formats

// Race Day Process

Simple for Race Directors.
Instant for Athletes.

From setup to results in a few straightforward steps — so you can focus on putting on a great event.

Register Your Event

Share your race details — date, format, number of athletes, checkpoints. We configure the timing system to match your course layout exactly.

Load Athlete Roster

Upload your participant list with names, bib numbers, and any other details. Everything is pre-loaded into the system before the start gun fires.

Go Live on Race Day

Chip mats activate automatically. For bib tracking, volunteers open the app on any phone or tablet and start logging numbers at their checkpoint.

Fans Follow in Real Time

Family, crew, and friends visit your race's live results page — updated the moment each athlete passes through. No refresh needed.

Official Results Published

When the last finisher crosses the line, official results are complete — sorted by finish time, category, gender, and age group, ready to share.

// Live Results

Your Race.
Live on the Web.

Every event gets a dedicated live results page that updates in real time as athletes hit each checkpoint. Family and friends can watch the progress of every runner from anywhere in the world.

The results page shows current checkpoint, elapsed time, and position — updated the instant a bib is entered or a chip is read. No app download required for spectators. Just a link.

For loop races and backyard ultras, the page tracks completed loops, current lap count, and cumulative mileage — exactly what crew and pacers need to know.

// Platform Features

Everything Your Race Needs,
Nothing It Doesn't.

Built by an engineer who has run 100-mile races — so every feature solves a real problem race directors and athletes actually face.

Live Within Seconds

Every lap and checkpoint reaches the live results page within seconds of the chip read or bib entry. Spectators never hit refresh — the page updates itself.

Aid Stations on a Phone

Volunteers open a link, type a bib, and the check-in lands on the live page. No app, no extra hardware. It warns them about wrong-station or out-of-order entries before they submit.

"Last Seen" for Crews

Every runner's row shows where they were last seen and when — the lap line or an aid station — so crews know where to drive and when to be there.

Keeps Timing Offline

Timing runs on-site, not in the cloud. If the internet drops in the mountains, nothing stops — every update queues and the live page catches up on its own when the connection returns.

Loops, Fixed-Time & Multi-Day

12, 24 and 48 hour loops, backyard formats, and 200-mile races over four days. Several events and loop lengths in one race, each with its own start, cutoff and lap cap.

Runner Board at the Finish

A TV at the start/finish shows each runner as they cross — name, lap, time — plus a chip check before the start so every runner knows their bib reads.

Start List Before the Gun

Runners and families find their names on the race page days before the start. The same link becomes live results the moment the race begins.

Age Group & Gender Awards

Overall, gender and age-group places for every event, calculated live. Winners are ready for the podium the moment they finish.

UltraSignup-Ready Results

Official results export in UltraSignup's exact upload format, per event, with every runner's full split history kept on the live page.

DNF, DNS & Drop Tracking

Mark a runner DNF, DNS or done in one click, with the reason recorded. The live page updates so crews and volunteers always know who's still out there.

A Page for Every Race

Each race gets its own link and QR code. Put it in the confirmation email and on a sign at check-in so friends and family are ready before race day.

Nothing Lost

Every crossing is written to disk the instant it happens. If the laptop restarts mid-race, the race picks up exactly where it left off.

// Perfect For

Every Race Format, Covered.

From your neighborhood fun run to a multi-day 100-mile sufferfest deep in the mountains.

Fun Runs

Community events, charity runs

5K & 10K

Road and trail formats

Half & Full Marathon

Point-to-point or out-and-back

Trail Ultras

50K, 50 Mile, 100K, 100 Mile

Loop Races

Fixed-time, timed-distance loops

Backyard Ultras

Hourly loops until one stands

// Race Schedule

Upcoming Races.
Past Results.

Races we're timing next, live results while they run, and every past result in one place.

// Book Your Race

Ready to Time Your Event?

Tell us about your race — format, date, number of athletes, and course layout — and we'll put together the right timing solution for you.

Get a Quote ✉  801endurance@gmail.com