Head-to-head
Pick two athletes to see how the race played out between them — by actual time, head start, and checkpoint.
Athlete A
OfficialRobb Briggs
#1290 · 1:57:08 · M57 · Group Q · DR
Wave start 8:43 AM (Q-DR)
Athlete B
OfficialDavid Rosenfeld
#1293 · 2:13:32 · M74 · Group AAA · DR
Wave start 8:27 AM (AAA-DR)
Interpretation
Robb (Q-DR) started at 8:43 AM; David (AAA-DR) started at 8:27 AM. That gave David a 16 minutes head start on Robb. On foot, Robb ran 1:57:08 and David ran 2:13:32 — Robb was 16:24 faster than David. Robb took official place 1290th (time-based 1274th) and David took official place 1293rd (time-based 1340th). Robb was faster on foot and finished ahead on the official clock too. Biggest swing: Robb gained 7:35 from Muir Woods to Cardiac.
Deltas
ComputedWave start
David Rosenfeld (AAA-DR) started 16 min earlier than Robb (Q-DR).
- Overall place Δ
- -3
- Actual time Δ
- -16:24
- Section gap Δ
- ±0 (same section)
- Wave start Δ
- 16 min (David earlier)
- Finish clock Δ
- -0:24
- Section place Δ
- +67
Δ = Robb − David. Negative means Robb is ahead/faster.
Race timeline
Computed- David (AAA-DR) started at 8:27 AM.
- Robb (Q-DR) started at 8:43 AM, 16:00 later.
- Actual running time: Robb was 16:24 faster on foot than David.
- Finish clock: Robb crossed the line 0:24 ahead of David — Robb wins this head-to-head.
Δ (A − B): actual -16:24 · finish clock -0:24.
Position through the course
OfficialSegment-by-segment splits
Official| Segment | Robb | David | Δ |
|---|---|---|---|
| Start to Top of Stairs | 12:53 | 14:31 | -1:38 |
| Stairs to Windy Gap | 10:25 | 12:24 | -1:59 |
| Windy Gap to Muir Woods | 9:07 | 9:11 | -0:04 |
| Muir Woods to Cardiac | 46:09 | 53:44 | -7:35 |
| Cardiac to White Gate | 22:49 | 26:02 | -3:13 |
| White Gate to The Stile | 12:36 | 14:07 | -1:31 |
| The Stile to Finish | 3:09 | 3:33 | -0:24 |
Δ negative = Robb ran the segment faster.