Head-to-head
Pick two athletes to see how the race played out between them — by actual time, head start, and checkpoint.
Athlete A
OfficialSally M Spitz
#1296 · 1:57:58 · F35 · 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
Sally (Q-DR) started at 8:43 AM; David (AAA-DR) started at 8:27 AM. That gave David a 16 minutes head start on Sally. On foot, Sally ran 1:57:58 and David ran 2:13:32 — Sally was 15:34 faster than David. Sally took official place 1296th (time-based 1278th) and David took official place 1293rd (time-based 1340th). David's head start was enough to flip the official order even though Sally was faster on foot. Biggest swing: Sally gained 9:23 from Muir Woods to Cardiac.
Deltas
ComputedWave start
David Rosenfeld (AAA-DR) started 16 min earlier than Sally (Q-DR).
- Overall place Δ
- +3
- Actual time Δ
- -15:34
- Section gap Δ
- ±0 (same section)
- Wave start Δ
- 16 min (David earlier)
- Finish clock Δ
- +0:26
- Section place Δ
- +68
Δ = Sally − David. Negative means Sally is ahead/faster.
Race timeline
Computed- David (AAA-DR) started at 8:27 AM.
- Sally (Q-DR) started at 8:43 AM, 16:00 later.
- Actual running time: Sally was 15:34 faster on foot than David.
- Finish clock: David crossed the line 0:26 ahead of Sally — David wins this head-to-head.
Δ (A − B): actual -15:34 · finish clock +0:26.
Position through the course
OfficialSegment-by-segment splits
Official| Segment | Sally | David | Δ |
|---|---|---|---|
| Start to Top of Stairs | 12:31 | 14:31 | -2:00 |
| Stairs to Windy Gap | 10:07 | 12:24 | -2:17 |
| Windy Gap to Muir Woods | 9:02 | 9:11 | -0:09 |
| Muir Woods to Cardiac | 44:21 | 53:44 | -9:23 |
| Cardiac to White Gate | 25:52 | 26:02 | -0:10 |
| White Gate to The Stile | 12:17 | 14:07 | -1:50 |
| The Stile to Finish | 3:48 | 3:33 | +0:15 |
Δ negative = Sally ran the segment faster.