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BOSTON MARATHON 2023

Jessica Li

Bib: 14756•F

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0:00
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Overall
#0 / 26622
Top 38%
Gender (Female)
#0 / 11423
Top 19%
Division (F18-39)
#0 / 4884
Top 34%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:02
Rank: #11784
Start → 5K
24:02 | 7:44/mi
10K· 6.21 mi
48:04
Rank: #12149 (-365)
5K → 10K
24:02 | 7:44/mi
15K· 9.32 mi
1:12:13
Rank: #12208 (-59)
10K → 15K
24:09 | 7:46/mi
20K· 12.43 mi
1:36:22
Rank: #12001 (+207)
15K → 20K
24:09 | 7:46/mi
Half· 13.11 mi
1:41:35
Rank: #11982 (+19)
20K → Half
5:13 | 7:39/mi
25K· 15.53 mi
2:00:15
Rank: #11631 (+351)
Half → 25K
18:40 | 7:42/mi
30K· 18.64 mi
2:24:16
Rank: #11079 (+552)
25K → 30K
24:01 | 7:44/mi
20M
2:34:47
Rank: #10838 (+241)
30K → 20M
10:31 | 7:44/mi
21M
2:43:06
Rank: #10753 (+85)
20M → 21M
8:19 | 8:19/mi
35K· 21.75 mi
2:48:55
Rank: #10710 (+43)
21M → 35K
5:49 | 7:46/mi
23M
2:58:38
Rank: #10542 (+168)
35K → 23M
9:43 | 7:46/mi
24M
3:06:02
Rank: #10354 (+188)
23M → 24M
7:24 | 7:24/mi
40K· 24.85 mi
3:12:50
Rank: #10299 (+55)
24M → 40K
6:48 | 7:57/mi
25.2M
3:15:34
Rank: #10210 (+89)
40K → 25.2M
2:44 | 7:57/mi
Finish· 26.22 mi
3:23:24
Rank: #10173 (+37)
25.2M → Finish
7:50 | 7:41/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:41:35
Pace7:45 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:41:49
Pace7:46 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:1424:027:4424:02
7:44
-
10K
6.21 mi11:17:1648:047:4424:02
7:44
0:00
15K
9.32 mi11:41:251:12:137:4524:09
7:46
+0:02
20K
12.43 mi12:05:341:36:227:4524:09
7:46
0:00
Half
13.11 mi12:10:471:41:357:455:13
7:39
-0:07
25K
15.53 mi12:29:272:00:157:4418:40
7:42
+0:03
30K
18.64 mi12:53:282:24:167:4424:01
7:44
+0:02
20M
20.00 mi13:03:592:34:477:4410:31
7:44
0:00
21M
21.00 mi13:12:182:43:067:468:19
8:19
+0:35
35K
21.75 mi13:18:072:48:557:465:49
7:46
-0:33
23M
23.00 mi13:27:502:58:387:469:43
7:46
0:00
24M
24.00 mi13:35:143:06:027:457:24
7:24
-0:22
40K
24.85 mi13:42:023:12:507:456:48
7:57
+0:33
25.2M
25.20 mi13:44:463:15:347:462:44
7:57
0:00
Finish
26.22 mi13:52:363:23:247:467:50
7:41
-0:16

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

7:24 /mi

Average Pace

7:46 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:15:05

96% of race

Time at Steady Pace

8:19

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:45 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨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.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:53:1424:027:4424:02
7:44
#11784
10K
6.21 mi11:17:1648:047:4424:02
7:44
#12149
15K
9.32 mi11:41:251:12:137:4524:09
7:46
#12208
20K
12.43 mi12:05:341:36:227:4524:09
7:46
#12001
Half
13.11 mi12:10:471:41:357:455:13
7:39
#11982
25K
15.53 mi12:29:272:00:157:4418:40
7:42
#11631
30K
18.64 mi12:53:282:24:167:4424:01
7:44
#11079
20M
20.00 mi13:03:592:34:477:4410:31
7:44
#10838
21M
21.00 mi13:12:182:43:067:468:19
8:19
#10753
35K
21.75 mi13:18:072:48:557:465:49
7:46
#10710
23M
23.00 mi13:27:502:58:387:469:43
7:46
#10542
24M
24.00 mi13:35:143:06:027:457:24
7:24
#10354
40K
24.85 mi13:42:023:12:507:456:48
7:57
#10299
25.2M
25.20 mi13:44:463:15:347:462:44
7:57
#10210
Finish
26.22 mi13:52:363:23:247:467:50
7:41
#10173
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi117842740274012493(Top 47%)3176(Top 28%)3176(Top 65%)
10K6.21 mi3.10 mi12149-3652942-2022942-20212556(Top 47%)3176(Top 28%)3176(Top 65%)
15K9.32 mi3.11 mi12208-593012-703012-7012493(Top 47%)3176(Top 28%)3176(Top 65%)
20K12.43 mi3.11 mi12001+2072911+1012911+10111510(Top 43%)2685(Top 24%)2685(Top 55%)
Half13.11 mi0.68 mi11982+192906+52906+511435(Top 43%)2576(Top 23%)2576(Top 53%)
25K15.53 mi2.42 mi11631+3512715+1912715+19110299(Top 39%)2133(Top 19%)2133(Top 44%)
30K18.64 mi3.11 mi11079+5522449+2662449+2668880(Top 33%)1664(Top 15%)1664(Top 34%)
20M20.00 mi1.36 mi10838+2412350+992350+998404(Top 32%)1566(Top 14%)1566(Top 32%)
21M21.00 mi1.00 mi10753+852328+222328+229353(Top 35%)2078(Top 18%)2078(Top 43%)
35K21.75 mi0.75 mi10710+432330-22330-210397(Top 39%)2582(Top 23%)2582(Top 53%)
23M23.00 mi1.25 mi10542+1682270+602270+608187(Top 31%)1677(Top 15%)1677(Top 34%)
24M24.00 mi1.00 mi10354+1882199+712199+717107(Top 27%)1336(Top 12%)1336(Top 27%)
40K24.85 mi0.85 mi10299+552201-22201-29666(Top 36%)2509(Top 22%)2509(Top 51%)
25.2M25.20 mi0.35 mi10210+892165+362165+366211(Top 23%)1158(Top 10%)1158(Top 24%)
Finish26.22 mi1.02 mi10173+372185-202185-209914(Top 37%)2661(Top 23%)2661(Top 54%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21stories
+97ft-345ft

Overall

12493

Females

3176

F18-39

3176

5K→10K

3.1 - 6.2 mi

Top 47%
×5stories
+79ft-138ft

Overall

12556

Females

3176

F18-39

3176

10K→15K

6.2 - 9.3 mi

Top 47%
×3stories
+67ft-78ft

Overall

12493

Females

3176

F18-39

3176

15K→20K

9.3 - 12.4 mi

Top 43%
×5stories
+106ft-86ft

Overall

11510

Females

2685

F18-39

2685

20K→Half

12.4 - 13.1 mi

Top 43%
×2stories
+19ft-37ft

Overall

11435

Females

2576

F18-39

2576

Half→25K

13.1 - 15.5 mi

Top 39%
×4stories
+66ft-88ft

Overall

10299

Females

2133

F18-39

2133

25K→30K

15.5 - 18.6 mi

Top 33%
×9stories
+181ft-148ft

Overall

8880

Females

1664

F18-39

1664

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

8404

Females

1566

F18-39

1566

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9353

Females

2078

F18-39

2078

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

10397

Females

2582

F18-39

2582

35K→23M

21.8 - 23.0 mi

Top 31%
×5stories
+23ft-63ft

Overall

8187

Females

1677

F18-39

1677

23M→24M

23.0 - 24.0 mi

Top 27%
×6stories
+12ft-82ft

Overall

7107

Females

1336

F18-39

1336

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9666

Females

2509

F18-39

2509

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6211

Females

1158

F18-39

1158

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2stories
+22ft-21ft

Overall

9914

Females

2661

F18-39

2661

Passing Analysis

Category:
Athletes Passed
2657*
Passed By
1046
Net Change
+1611
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11784
5K → 10K149514-365#11784#12149
10K → 15K172231-59#12149#12208
15K → 20K27366+207#12208#12001
20K → Half3819+19#12001#11982
Half → 25K36615+351#11982#11631
25K → 30K5597+552#11631#11079
30K → 20M251*10+241#11079#10838
20M → 21M11530+85#10838#10753
21M → 35K7431+43#10753#10710
35K → 23M18214+168#10710#10542
23M → 24M1935+188#10542#10354
24M → 40K9742+55#10354#10299
40K → 25.2M94*5+89#10299#10210
25.2M → Finish9457+37#10210#10173
TOTALS2657*1046+1611

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing