Head-to-head
Pick two athletes to see how the race played out between them — by actual time, head start, and checkpoint.
Athlete A
OfficialKATHERINE OBRIEN
#1159 · 1:42:01 · F31 · Group Q · DR
Wave start 8:43 AM (Q-DR)
Athlete B
OfficialJonnie A Alper
#1158 · 1:46:00 · M62 · Group L · DR
Wave start 8:39 AM (L-DR)
Comparison report
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The PDF includes the interpretation, deltas, race timeline, position-through-the-course chart, and segment-by-segment splits shown below.
Interpretation
KATHERINE (Q-DR) started at 8:43 AM; Jonnie (L-DR) started at 8:39 AM. That gave Jonnie a 4 minutes head start on KATHERINE. On foot, KATHERINE ran 1:42:01 and Jonnie ran 1:46:00 — KATHERINE was 3:59 faster than Jonnie. KATHERINE took official place 1159th (time-based 1122nd) and Jonnie took official place 1158th (time-based 1179th). Jonnie's head start was enough to flip the official order even though KATHERINE was faster on foot. Biggest swing: KATHERINE gained 3:16 from Muir Woods to Cardiac.
Deltas
ComputedWave start
Jonnie A Alper (L-DR) started 4 min earlier than KATHERINE (Q-DR).
- Overall place Δ
- +1
- Actual time Δ
- -3:59
- Section gap Δ
- ±0 (same section)
- Wave start Δ
- 4 min (Jonnie earlier)
- Finish clock Δ
- +0:01
- Section place Δ
- +45
Δ = KATHERINE − Jonnie. Negative means KATHERINE is ahead/faster.
Race timeline
Computed- Jonnie (L-DR) started at 8:39 AM.
- KATHERINE (Q-DR) started at 8:43 AM, 4:00 later.
- Actual running time: KATHERINE was 3:59 faster on foot than Jonnie.
- Finish clock: Jonnie crossed the line 0:01 ahead of KATHERINE — Jonnie wins this head-to-head.
Δ (A − B): actual -3:59 · finish clock +0:01.
Position through the course
OfficialSegment-by-segment splits
Official| Segment | KATHERINE | Jonnie | Δ |
|---|---|---|---|
| Start to Top of Stairs | 12:08 | 12:20 | -0:12 |
| Stairs to Windy Gap | 8:51 | 9:03 | -0:12 |
| Windy Gap to Muir Woods | 9:38 | 8:09 | +1:29 |
| Muir Woods to Cardiac | 37:35 | 40:51 | -3:16 |
| Cardiac to White Gate | 21:16 | 22:03 | -0:47 |
| White Gate to The Stile | 9:56 | 10:32 | -0:36 |
| The Stile to Finish | 2:37 | 3:02 | -0:25 |
Δ negative = KATHERINE ran the segment faster.