How it works
Everything on this board comes from the timing mats at the checkpoints. When a racer crosses a mat, Zone4 records the time and this board picks it up. Between mats, the board knows nothing. That one fact explains most of what you will see.
Start times
The 108 km, 54 km, and both relays start at 8:00 a.m. Mountain time. The half marathon starts at 8:30. Start times are taken as given: nobody is placed by how they crossed the start line, so nobody appears on the leaderboard until they reach the first checkpoint, about an hour in for the leaders. Until then the board says the race has started and roughly when the first data is expected.
The leaderboard
Places come only from checkpoints. A racer is ranked by the last checkpoint they crossed and their time there. Anyone deeper into the course is ahead; at the same checkpoint, the earlier time is ahead. The board never guesses where somebody is between checkpoints, and it never uses pace to rank anyone.
The number beside a name is their elapsed time at their last checkpoint. The gap is measured against the leader at the same checkpoint. Tap a row to see every crossing recorded for that racer.
If a racer misses a mat
Sometimes a chip is not read at a checkpoint. When that happens the racer stays ranked at the last checkpoint that did read them. As other racers reach the checkpoint they missed, those racers move ahead on the leaderboard, so the racer who missed the mat will slide down the list for a while. That is not a judgement about how they are running; the board simply has no read to place them by. When they cross the next mat, they are ranked from that read and their place is restored.
There is no way around this. Between checkpoints the board cannot tell whether a racer is running strongly, taking a rest, or has left the course, so it does not pretend to know.
Timing under review
Occasionally a read arrives that the board cannot square with the reads before it, for example a checkpoint time with no read at the checkpoint before, or a time that would need an impossible pace. That racer keeps their place from their last clean read and the row says the later timing is under review. Once more reads come in that make sense of it, or the timing crew corrects it, the review clears.
DNS and DNF
DNS means the racer did not start; DNF means they have left the race. Both come from the timing crew, not from this board. Until the crew marks a racer DNF, a racer who is no longer moving will simply show no new checkpoint, and after a few hours the row says there has been no recent timing data.
The progress tracker
The tracker shows each race on its own course profile, with a count of how many racers are through every checkpoint. The leaders, and any racer you add by name or bib, are marked at the last checkpoint they crossed.
From that mark, a dashed line shows where their own average pace so far would put them right now. This is the only place on the board that estimates anything, and it is drawn dashed for that reason. The estimate slows down as it nears the next checkpoint and never reaches it on its own; only a real read moves the racer to the next mat. It keeps running until one of two things happens: the racer crosses the next mat, at which point the estimate starts fresh from that read, or the timing crew marks them DNF, at which point it stops. If a racer's timing is under review, no estimate is drawn for them until it clears.
Delays
Timing can run behind the race. Mats upload in batches, and a mat in a poor signal spot can be late by minutes or occasionally longer. The board always shows the latest data it has; it never changes or hides anything because it is late. Every page carries a line saying the time of that latest data, and if nothing new has arrived for a few minutes the line says the board may be behind the race. That is the only signal: the standings you see are the last ones received.
Relays
Relay teams are ranked as one racer, by the team's last checkpoint. The board does not know which team member is running each leg.
Official results
The official results are Zone4's. This is a companion board built from their public timing; nothing here is estimated unless it says so, and nothing here changes a result. Visit the Black Spur Ultra race page for official results and updates.