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BOSTON MARATHON 2023

Jennifer Chang

Bib: 22758•F

NJ

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F45-49)
#0 / 1817
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:46
Rank: #18328
Start → 5K
26:46 | 8:37/mi
10K· 6.21 mi
53:18
Rank: #18400 (-72)
5K → 10K
26:32 | 8:32/mi
15K· 9.32 mi
1:20:37
Rank: #18751 (-351)
10K → 15K
27:19 | 8:48/mi
20K· 12.43 mi
1:48:58
Rank: #19165 (-414)
15K → 20K
28:21 | 9:07/mi
Half· 13.11 mi
1:55:04
Rank: #19216 (-51)
20K → Half
6:06 | 8:56/mi
25K· 15.53 mi
2:17:06
Rank: #19230 (-14)
Half → 25K
22:02 | 9:05/mi
30K· 18.64 mi
2:46:44
Rank: #19335 (-105)
25K → 30K
29:38 | 9:32/mi
20M
3:00:00
Rank: #19363 (-28)
30K → 20M
13:16 | 9:46/mi
21M
3:09:59
Rank: #19274 (+89)
20M → 21M
9:59 | 9:59/mi
35K· 21.75 mi
3:16:37
Rank: #19198 (+76)
21M → 35K
6:38 | 8:52/mi
23M
3:28:15
Rank: #19100 (+98)
35K → 23M
11:38 | 9:17/mi
24M
3:37:18
Rank: #19025 (+75)
23M → 24M
9:03 | 9:03/mi
40K· 24.85 mi
3:45:10
Rank: #18957 (+68)
24M → 40K
7:52 | 9:12/mi
25.2M
3:48:32
Rank: #18914 (+43)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:57:34
Rank: #18873 (+41)
25.2M → Finish
9:02 | 8:52/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:04
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time2:02:30
Pace9:21 /mi
📊Positive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:4226:468:3726:46
8:37
-
10K
6.21 mi11:47:1453:188:3526:32
8:32
-0:05
15K
9.32 mi12:14:331:20:378:3927:19
8:48
+0:16
20K
12.43 mi12:42:541:48:588:4628:21
9:07
+0:19
Half
13.11 mi12:49:001:55:048:476:06
8:56
-0:11
25K
15.53 mi13:11:022:17:068:5022:02
9:05
+0:09
30K
18.64 mi13:40:402:46:448:5729:38
9:32
+0:27
20M
20.00 mi13:53:563:00:009:0013:16
9:46
+0:14
21M
21.00 mi14:03:553:09:599:039:59
9:59
+0:13
35K
21.75 mi14:10:333:16:379:026:38
8:52
-1:07
23M
23.00 mi14:22:113:28:159:0311:38
9:17
+0:25
24M
24.00 mi14:31:143:37:189:039:03
9:03
-0:14
40K
24.85 mi14:39:063:45:109:047:52
9:12
+0:09
25.2M
25.20 mi14:42:283:48:329:043:22
9:46
+0:34
Finish
26.22 mi14:51:303:57:349:049:02
8:52
-0:54

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

8:32 /mi

Average Pace

9:04 /mi

Slowest Pace

9:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:01:19

76% of race

Time at Steady Pace

56:15

24% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:04 /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 mi11:20:4226:468:3726:46
8:37
#18328
10K
6.21 mi11:47:1453:188:3526:32
8:32
#18400
15K
9.32 mi12:14:331:20:378:3927:19
8:48
#18751
20K
12.43 mi12:42:541:48:588:4628:21
9:07
#19165
Half
13.11 mi12:49:001:55:048:476:06
8:56
#19216
25K
15.53 mi13:11:022:17:068:5022:02
9:05
#19230
30K
18.64 mi13:40:402:46:448:5729:38
9:32
#19335
20M
20.00 mi13:53:563:00:009:0013:16
9:46
#19363
21M
21.00 mi14:03:553:09:599:039:59
9:59
#19274
35K
21.75 mi14:10:333:16:379:026:38
8:52
#19198
23M
23.00 mi14:22:113:28:159:0311:38
9:17
#19100
24M
24.00 mi14:31:143:37:189:039:03
9:03
#19025
40K
24.85 mi14:39:063:45:109:047:52
9:12
#18957
25.2M
25.20 mi14:42:283:48:329:043:22
9:46
#18914
Finish
26.22 mi14:51:303:57:349:049:02
8:52
#18873
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi183286764676419472(Top 73%)7378(Top 65%)7378(Top 406%)
10K6.21 mi3.10 mi18400-726762+26762+218504(Top 70%)6770(Top 59%)6770(Top 373%)
15K9.32 mi3.11 mi18751-3516977-2156977-21519472(Top 73%)7378(Top 65%)7378(Top 406%)
20K12.43 mi3.11 mi19165-4147213-2367213-23620258(Top 76%)7817(Top 68%)7817(Top 430%)
Half13.11 mi0.68 mi19216-517245-327245-3220194(Top 76%)7765(Top 68%)7765(Top 427%)
25K15.53 mi2.42 mi19230-147255-107255-1019366(Top 73%)7345(Top 64%)7345(Top 404%)
30K18.64 mi3.11 mi19335-1057337-827337-8219579(Top 74%)7520(Top 66%)7520(Top 414%)
20M20.00 mi1.36 mi19363-287364-277364-2719748(Top 74%)7723(Top 68%)7723(Top 425%)
21M21.00 mi1.00 mi19274+897328+367328+3617991(Top 68%)6756(Top 59%)6756(Top 372%)
35K21.75 mi0.75 mi19198+767287+417287+4117326(Top 65%)6466(Top 57%)6466(Top 356%)
23M23.00 mi1.25 mi19100+987240+477240+4717507(Top 66%)6579(Top 58%)6579(Top 362%)
24M24.00 mi1.00 mi19025+757213+277213+2717480(Top 66%)6628(Top 58%)6628(Top 365%)
40K24.85 mi0.85 mi18957+687174+397174+3917121(Top 64%)6475(Top 57%)6475(Top 356%)
25.2M25.20 mi0.35 mi18914+437158+167158+1616447(Top 62%)6141(Top 54%)6141(Top 338%)
Finish26.22 mi1.02 mi18873+417136+227136+2217364(Top 65%)6572(Top 58%)6572(Top 362%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21stories
+97ft-345ft

Overall

19472

Females

7378

F45-49

7378

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

18504

Females

6770

F45-49

6770

10K→15K

6.2 - 9.3 mi

Top 73%
×3stories
+67ft-78ft

Overall

19472

Females

7378

F45-49

7378

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

20258

Females

7817

F45-49

7817

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

20194

Females

7765

F45-49

7765

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

19366

Females

7345

F45-49

7345

25K→30K

15.5 - 18.6 mi

Top 74%
×9stories
+181ft-148ft

Overall

19579

Females

7520

F45-49

7520

30K→20M

18.6 - 20.0 mi

Top 74%
×5stories
+64ft-50ft

Overall

19748

Females

7723

F45-49

7723

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

17991

Females

6756

F45-49

6756

21M→35K

21.0 - 21.8 mi

Top 65%
×7stories
+17ft-86ft

Overall

17326

Females

6466

F45-49

6466

35K→23M

21.8 - 23.0 mi

Top 66%
×5stories
+23ft-63ft

Overall

17507

Females

6579

F45-49

6579

23M→24M

23.0 - 24.0 mi

Top 66%
×6stories
+12ft-82ft

Overall

17480

Females

6628

F45-49

6628

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17121

Females

6475

F45-49

6475

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16447

Females

6141

F45-49

6141

25.2M→Finish

25.2 - 26.2 mi

Top 65%
×2stories
+22ft-21ft

Overall

17364

Females

6572

F45-49

6572

Passing Analysis

Category:
Athletes Passed
1376
Passed By
1921
Net Change
-545
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18328
5K → 10K278350-72#18328#18400
10K → 15K77428-351#18400#18751
15K → 20K57471-414#18751#19165
20K → Half1465-51#19165#19216
Half → 25K117131-14#19216#19230
25K → 30K128233-105#19230#19335
30K → 20M75103-28#19335#19363
20M → 21M11930+89#19363#19274
21M → 35K848+76#19274#19198
35K → 23M12628+98#19198#19100
23M → 24M10126+75#19100#19025
24M → 40K8315+68#19025#18957
40K → 25.2M529+43#18957#18914
25.2M → Finish6524+41#18914#18873
TOTALS13761921-545
📊

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