Head-to-head
Pick two athletes to see how the race played out between them — by actual time, head start, and checkpoint.
Athlete A
OfficialIvy Chen
#1291 · 1:59:15 · F44 · Group N · DR
Wave start 8:41 AM (N-DR)
Athlete B
OfficialDavid Rosenfeld
#1293 · 2:13:32 · M74 · Group AAA · DR
Wave start 8:27 AM (AAA-DR)
Interpretation
Ivy (N-DR) started at 8:41 AM; David (AAA-DR) started at 8:27 AM. That gave David a 14 minutes head start on Ivy. On foot, Ivy ran 1:59:15 and David ran 2:13:32 — Ivy was 14:17 faster than David. Ivy took official place 1291st (time-based 1284th) and David took official place 1293rd (time-based 1340th). Ivy was faster on foot and finished ahead on the official clock too. Biggest swing: Ivy gained 10:06 from Muir Woods to Cardiac.
Deltas
ComputedWave start
David Rosenfeld (AAA-DR) started 14 min earlier than Ivy (N-DR).
- Overall place Δ
- -2
- Actual time Δ
- -14:17
- Section gap Δ
- ±0 (same section)
- Wave start Δ
- 14 min (David earlier)
- Finish clock Δ
- -0:17
- Section place Δ
- +21
Δ = Ivy − David. Negative means Ivy is ahead/faster.
Race timeline
Computed- David (AAA-DR) started at 8:27 AM.
- Ivy (N-DR) started at 8:41 AM, 14:00 later.
- Actual running time: Ivy was 14:17 faster on foot than David.
- Finish clock: Ivy crossed the line 0:17 ahead of David — Ivy wins this head-to-head.
Δ (A − B): actual -14:17 · finish clock -0:17.
Position through the course
OfficialSegment-by-segment splits
Official| Segment | Ivy | David | Δ |
|---|---|---|---|
| Start to Top of Stairs | 12:24 | 14:31 | -2:07 |
| Stairs to Windy Gap | 9:59 | 12:24 | -2:25 |
| Windy Gap to Muir Woods | 10:57 | 9:11 | +1:46 |
| Muir Woods to Cardiac | 43:38 | 53:44 | -10:06 |
| Cardiac to White Gate | 27:49 | 26:02 | +1:47 |
| White Gate to The Stile | 11:38 | 14:07 | -2:29 |
| The Stile to Finish | 2:50 | 3:33 | -0:43 |
Δ negative = Ivy ran the segment faster.