Arnelle Chang
San Francisco, CA
Bib: 21755 F 29
⏱️ Race Timeline
The Course
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A one-of-a-kind AI Race Performance Report that reads your race like a coach. A plain-English story of how you raced, where you surged and faded, and what it all means. Emailed to you, free.
Checkpoint Splits
| Checkpoint | Distance | Time of Day | Time | Avg Pace | Segment Time | Segment Pace | Diff |
|---|---|---|---|---|---|---|---|
1.2M | 1.20 mi | 08:49:31 | 11:06 | 9:15 | 11:06 | 9:15 | - |
4.9M | 4.90 mi | 09:22:52 | 44:27 | 9:04 | 33:21 | 9:01 | -0:14 |
11.9M | 11.90 mi | 10:34:14 | 1:55:49 | 9:44 | 1:11:22 | 10:12 | +1:11 |
Finish | 13.11 mi | 10:47:00 | 2:08:35 | 9:49 | 12:46 | 10:33 | +0:21 |
Checkpoints & Pacing
📈Pace Line
Pace Progression
Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.
Fastest Pace
9:01 /mi
Average Pace
9:49 /mi
Slowest Pace
10:33 /mi
📊Segments
Segment Time Comparison
Time at Faster Pace
44:27
35% of race
Time at Steady Pace
1:24:08
65% of race
Time at Slower Pace
0:00
0% of race
Average Pace: 9:48 /mi
🎨Heatmap
Pace Heatmap
Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.
Click or hover over segments to see details
✨Sparklines
Checkpoint Splits with Pace Trends
Overall Pace Trend
| Checkpoint | Distance | Time of Day | Time | Avg Pace | Segment | Pace | Trend | Rank |
|---|---|---|---|---|---|---|---|---|
1.2M | 1.20 mi | 08:49:31 | 11:06 | 9:15 | 11:06 | 9:15 | #919 | |
4.9M | 4.90 mi | 09:22:52 | 44:27 | 9:04 | 33:21 | 9:01 | #1376 | |
11.9M | 11.90 mi | 10:34:14 | 1:55:49 | 9:44 | 1:11:22 | 10:12 | #1678 | |
Finish | 13.11 mi | 10:47:00 | 2:08:35 | 9:49 | 12:46 | 10:33 | #1683 |
Checkpoint and Segment Rankings
| Checkpoint | Distance | Seg. Dist | Overall | Females | F25-29 | Seg. Overall | Seg. Females | Seg. F25-29 |
|---|---|---|---|---|---|---|---|---|
| 1.2M | 1.20 mi | 1.20 mi | 919 | 244 | 61 | 919(Top 25%) | 244(Top 15%) | 61(Top 13%) |
| 4.9M | 4.90 mi | 3.70 mi | 1376-457 | 406-162 | 110-49 | 1527(Top 42%) | 480(Top 29%) | 134(Top 29%) |
| 11.9M | 11.90 mi | 7.00 mi | 1678-302 | 557-151 | 165-55 | 1884(Top 52%) | 676(Top 41%) | 199(Top 43%) |
| Finish | 13.11 mi | 1.21 mi | 1683-5 | 567-10 | 169-4 | 1844(Top 51%) | 677(Top 41%) | 210(Top 46%) |
Segment Performance Analysis
Start → 1.2M
0.0 - 1.2 mi
Overall
919
Females
244
F25-29
61
1.2M→4.9M
1.2 - 4.9 mi
Overall
1527
Females
480
F25-29
135
4.9M→11.9M
4.9 - 11.9 mi
Overall
1884
Females
676
F25-29
199
11.9M→Finish
11.9 - 13.1 mi
Overall
1844
Females
677
F25-29
210
Passing Analysis
| Segment | Athletes Passed | Passed By | Net Change | Start Rank | End Rank |
|---|---|---|---|---|---|
| Start → 1.2M | - | - | - | - | #919 |
| 1.2M → 4.9M | 6* | 463 | -457 | #919 | #1376 |
| 4.9M → 11.9M | 33* | 335 | -302 | #1376 | #1678 |
| 11.9M → Finish | 19* | 24 | -5 | #1678 | #1683 |
| TOTALS | 58* | 822 | -764 |
* Includes athletes who did not complete a segment (DNF/DNQ).
Passing Visuals
🔄Passing Circle
🌊Position Flow
🏃Race Lanes
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Official Timing Data
Enhanced athlete results built from official timing data.
Race managed by
The San Francisco Marathon
