Head-to-head
Pick two athletes to see how the race played out between them — by actual time, head start, and checkpoint.
Athlete A
OfficialMarshall Allen boyd
#619 · 1:10:38 · M46 · Group W · DR
Wave start 8:48 AM (W-DR)
Athlete B
OfficialJackson Sell
#617 · 1:07:34 · M26 · Group Z · DR
Wave start 8:51 AM (Z-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
Marshall (W-DR) started at 8:48 AM; Jackson (Z-DR) started at 8:51 AM. That gave Marshall a 3 minutes head start on Jackson. On foot, Marshall ran 1:10:38 and Jackson ran 1:07:34 — Jackson was 3:04 faster than Marshall. Marshall took official place 619th (time-based 343rd) and Jackson took official place 617th (time-based 251st). Jackson was faster on foot and finished ahead on the official clock too. Biggest swing: Jackson gained 1:58 from Muir Woods to Cardiac.
Deltas
ComputedWave start
Marshall Allen boyd (W-DR) started 3 min earlier than Jackson (Z-DR).
- Overall place Δ
- +2
- Actual time Δ
- +3:04
- Section gap Δ
- ±0 (same section)
- Wave start Δ
- 3 min (Marshall earlier)
- Finish clock Δ
- +0:04
- Section place Δ
- -3
Δ = Marshall − Jackson. Negative means Marshall is ahead/faster.
Race timeline
Computed- Marshall (W-DR) started at 8:48 AM.
- Jackson (Z-DR) started at 8:51 AM, 3:00 later.
- Actual running time: Jackson was 3:04 faster on foot than Marshall.
- Finish clock: Jackson crossed the line 0:04 ahead of Marshall — Jackson wins this head-to-head.
Δ (A − B): actual +3:04 · finish clock +0:04.
Position through the course
OfficialSegment-by-segment splits
Official| Segment | Marshall | Jackson | Δ |
|---|---|---|---|
| Start to Top of Stairs | 7:50 | 8:06 | -0:16 |
| Stairs to Windy Gap | 6:27 | 6:00 | +0:27 |
| Windy Gap to Muir Woods | 6:01 | 5:52 | +0:09 |
| Muir Woods to Cardiac | 27:35 | 25:37 | +1:58 |
| Cardiac to White Gate | 14:07 | 13:24 | +0:43 |
| White Gate to The Stile | 6:53 | 6:43 | +0:10 |
| The Stile to Finish | 1:45 | 1:52 | -0:07 |
Δ negative = Marshall ran the segment faster.