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BOSTON MARATHON 2023

E-Fang Tsai

Bib: 23894•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F55-59)
#0 / 815
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:18
Rank: #20906
Start → 5K
28:18 | 9:07/mi
10K· 6.21 mi
54:56
Rank: #19892 (+1014)
5K → 10K
26:38 | 8:34/mi
15K· 9.32 mi
1:22:38
Rank: #19951 (-59)
10K → 15K
27:42 | 8:55/mi
20K· 12.43 mi
1:54:37
Rank: #21262 (-1311)
15K → 20K
31:59 | 10:18/mi
Half· 13.11 mi
2:00:55
Rank: #21260 (+2)
20K → Half
6:18 | 9:14/mi
25K· 15.53 mi
2:23:10
Rank: #20993 (+267)
Half → 25K
22:15 | 9:11/mi
30K· 18.64 mi
2:54:05
Rank: #20961 (+32)
25K → 30K
30:55 | 9:57/mi
20M
3:07:29
Rank: #20877 (+84)
30K → 20M
13:24 | 9:52/mi
21M
3:18:02
Rank: #20793 (+84)
20M → 21M
10:33 | 10:33/mi
35K· 21.75 mi
3:24:41
Rank: #20668 (+125)
21M → 35K
6:39 | 8:53/mi
23M
3:36:51
Rank: #20559 (+109)
35K → 23M
12:10 | 9:43/mi
24M
3:46:07
Rank: #20463 (+96)
23M → 24M
9:16 | 9:16/mi
40K· 24.85 mi
3:54:46
Rank: #20443 (+20)
24M → 40K
8:39 | 10:07/mi
25.2M
3:58:29
Rank: #20421 (+22)
40K → 25.2M
3:43 | 10:47/mi
Finish· 26.22 mi
4:07:59
Rank: #20389 (+32)
25.2M → Finish
9:30 | 9:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:55
Pace9:13 /mi
2nd Half
Distance13.11 mi
Time2:07:04
Pace9:42 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:0528:189:0728:18
9:07
-
10K
6.21 mi11:52:4354:568:5026:38
8:34
-0:33
15K
9.32 mi12:20:251:22:388:5227:42
8:55
+0:21
20K
12.43 mi12:52:241:54:379:1331:59
10:18
+1:23
Half
13.11 mi12:58:422:00:559:136:18
9:14
-1:04
25K
15.53 mi13:20:572:23:109:1322:15
9:11
-0:03
30K
18.64 mi13:51:522:54:059:2030:55
9:57
+0:46
20M
20.00 mi14:05:163:07:299:2213:24
9:52
-0:05
21M
21.00 mi14:15:493:18:029:2610:33
10:33
+0:41
35K
21.75 mi14:22:283:24:419:256:39
8:53
-1:40
23M
23.00 mi14:34:383:36:519:2612:10
9:43
+0:50
24M
24.00 mi14:43:543:46:079:259:16
9:16
-0:27
40K
24.85 mi14:52:333:54:469:278:39
10:07
+0:51
25.2M
25.20 mi14:56:163:58:299:283:43
10:47
+0:40
Finish
26.22 mi15:05:464:07:599:289:30
9:19
-1:28

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

8:34 /mi

Average Pace

9:28 /mi

Slowest Pace

10:47 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:00:59

25% of race

Time at Steady Pace

1:15:37

30% of race

Time at Slower Pace

1:51:23

45% of race

Average Pace: 9:27 /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 mi11:26:0528:189:0728:18
9:07
#20906
10K
6.21 mi11:52:4354:568:5026:38
8:34
#19892
15K
9.32 mi12:20:251:22:388:5227:42
8:55
#19951
20K
12.43 mi12:52:241:54:379:1331:59
10:18
#21262
Half
13.11 mi12:58:422:00:559:136:18
9:14
#21260
25K
15.53 mi13:20:572:23:109:1322:15
9:11
#20993
30K
18.64 mi13:51:522:54:059:2030:55
9:57
#20961
20M
20.00 mi14:05:163:07:299:2213:24
9:52
#20877
21M
21.00 mi14:15:493:18:029:2610:33
10:33
#20793
35K
21.75 mi14:22:283:24:419:256:39
8:53
#20668
23M
23.00 mi14:34:383:36:519:2612:10
9:43
#20559
24M
24.00 mi14:43:543:46:079:259:16
9:16
#20463
40K
24.85 mi14:52:333:54:469:278:39
10:07
#20443
25.2M
25.20 mi14:56:163:58:299:283:43
10:47
#20421
Finish
26.22 mi15:05:464:07:599:289:30
9:19
#20389
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi209068323832320122(Top 76%)7745(Top 68%)7745(Top 950%)
10K6.21 mi3.10 mi19892+10147705+6187705+61818692(Top 70%)6897(Top 60%)6897(Top 846%)
15K9.32 mi3.11 mi19951-597707-27707-220122(Top 76%)7745(Top 68%)7745(Top 950%)
20K12.43 mi3.11 mi21262-13118412-7058412-70523459(Top 88%)9601(Top 84%)9601(Top 1178%)
Half13.11 mi0.68 mi21260+28407+58407+521284(Top 80%)8395(Top 73%)8395(Top 1030%)
25K15.53 mi2.42 mi20993+2678261+1468261+14619748(Top 74%)7560(Top 66%)7560(Top 928%)
30K18.64 mi3.11 mi20961+328260+18260+120897(Top 78%)8284(Top 73%)8284(Top 1016%)
20M20.00 mi1.36 mi20877+848222+388222+3820061(Top 75%)7890(Top 69%)7890(Top 968%)
21M21.00 mi1.00 mi20793+848186+368186+3619754(Top 74%)7795(Top 68%)7795(Top 956%)
35K21.75 mi0.75 mi20668+1258124+628124+6217444(Top 66%)6537(Top 57%)6537(Top 802%)
23M23.00 mi1.25 mi20559+1098083+418083+4119157(Top 72%)7505(Top 66%)7505(Top 921%)
24M24.00 mi1.00 mi20463+968044+398044+3918363(Top 69%)7096(Top 62%)7096(Top 871%)
40K24.85 mi0.85 mi20443+208035+98035+920294(Top 76%)8215(Top 72%)8215(Top 1008%)
25.2M25.20 mi0.35 mi20421+228033+28033+219943(Top 75%)8032(Top 70%)8032(Top 986%)
Finish26.22 mi1.02 mi20389+328020+138020+1319476(Top 73%)7719(Top 68%)7719(Top 947%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

20122

Females

7745

F55-59

7745

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

18692

Females

6897

F55-59

6897

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

20122

Females

7745

F55-59

7745

15K→20K

9.3 - 12.4 mi

Top 88%
×5stories
+106ft-86ft

Overall

23459

Females

9601

F55-59

9601

20K→Half

12.4 - 13.1 mi

Top 80%
×2stories
+19ft-37ft

Overall

21284

Females

8395

F55-59

8395

Half→25K

13.1 - 15.5 mi

Top 74%
×4stories
+66ft-88ft

Overall

19748

Females

7560

F55-59

7560

25K→30K

15.5 - 18.6 mi

Top 78%
×9stories
+181ft-148ft

Overall

20897

Females

8284

F55-59

8284

30K→20M

18.6 - 20.0 mi

Top 75%
×5stories
+64ft-50ft

Overall

20061

Females

7890

F55-59

7890

20M→21M

20.0 - 21.0 mi

Top 74%
×8stories
+106ft-24ft

Overall

19754

Females

7795

F55-59

7795

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

17444

Females

6537

F55-59

6537

35K→23M

21.8 - 23.0 mi

Top 72%
×5stories
+23ft-63ft

Overall

19157

Females

7505

F55-59

7505

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

18363

Females

7096

F55-59

7096

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

20294

Females

8215

F55-59

8215

40K→25.2M

24.9 - 25.2 mi

Top 75%
×1story
+13ft-16ft

Overall

19943

Females

8032

F55-59

8032

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2stories
+22ft-21ft

Overall

19476

Females

7719

F55-59

7719

Passing Analysis

Category:
Athletes Passed
2428
Passed By
1911
Net Change
+517
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20906
5K → 10K106652+1014#20906#19892
10K → 15K160219-59#19892#19951
15K → 20K121323-1311#19951#21262
20K → Half2422+2#21262#21260
Half → 25K28013+267#21260#20993
25K → 30K164132+32#20993#20961
30K → 20M11834+84#20961#20877
20M → 21M10723+84#20877#20793
21M → 35K1261+125#20793#20668
35K → 23M12718+109#20668#20559
23M → 24M1015+96#20559#20463
24M → 40K5434+20#20463#20443
40K → 25.2M3412+22#20443#20421
25.2M → Finish5523+32#20421#20389
TOTALS24281911+517
📊

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