Head-to-head
Pick two athletes to see how the race played out between them — by actual time, head start, and checkpoint.
Athlete A
OfficialDavid A Greenblat
#1252 · 1:58:23 · M67 · Group G · DR
Wave start 8:35 AM (G-DR)
Athlete B
OfficialSonia Collins
#1251 · 1:53:21 · F45 · Group M · DR
Wave start 8:40 AM (M-DR)
Interpretation
David (G-DR) started at 8:35 AM; Sonia (M-DR) started at 8:40 AM. That gave David a 5 minutes head start on Sonia. On foot, David ran 1:58:23 and Sonia ran 1:53:21 — Sonia was 5:02 faster than David. David took official place 1252nd (time-based 1281st) and Sonia took official place 1251st (time-based 1251st). Sonia was faster on foot and finished ahead on the official clock too. Biggest swing: Sonia gained 3:32 from Muir Woods to Cardiac.
Deltas
ComputedWave start
David A Greenblat (G-DR) started 5 min earlier than Sonia (M-DR).
- Overall place Δ
- +1
- Actual time Δ
- +5:02
- Section gap Δ
- ±0 (same section)
- Wave start Δ
- 5 min (David earlier)
- Finish clock Δ
- +0:02
- Section place Δ
- -34
Δ = David − Sonia. Negative means David is ahead/faster.
Race timeline
Computed- David (G-DR) started at 8:35 AM.
- Sonia (M-DR) started at 8:40 AM, 5:00 later.
- Actual running time: Sonia was 5:02 faster on foot than David.
- Finish clock: Sonia crossed the line 0:02 ahead of David — Sonia wins this head-to-head.
Δ (A − B): actual +5:02 · finish clock +0:02.
Position through the course
OfficialSegment-by-segment splits
Official| Segment | David | Sonia | Δ |
|---|---|---|---|
| Start to Top of Stairs | 11:44 | 11:36 | +0:08 |
| Stairs to Windy Gap | 9:29 | 10:07 | -0:38 |
| Windy Gap to Muir Woods | 9:07 | 9:43 | -0:36 |
| Muir Woods to Cardiac | 45:17 | 41:45 | +3:32 |
| Cardiac to White Gate | 25:24 | 25:15 | +0:09 |
| White Gate to The Stile | 13:33 | 12:08 | +1:25 |
| The Stile to Finish | 3:49 | 2:47 | +1:02 |
Δ negative = David ran the segment faster.