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BOSTON MARATHON 2023

Yir Lirng Chang

Bib: 29744•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
9:38/mi
29:55
↑ 97↓ 3451.5%
10K· 6.21 mi
9:32/mi
59:31
↑ 79↓ 1380.4%
15K· 9.32 mi
9:17/mi
1:28:21
↑ 67↓ 78
20K· 12.43 mi
9:18/mi
1:57:14
↑ 106↓ 860.1%
Half· 13.11 mi
9:02/mi
2:03:24
↑ 19↓ 370.5%
25K· 15.53 mi
9:18/mi
2:25:57
↑ 66↓ 880.2%
30K· 18.64 mi
9:31/mi
2:55:31
↑ 181↓ 1480.2%
20M
9:24/mi
3:08:18
↑ 64↓ 500.2%
21M
9:54/mi
3:18:12
↑ 106↓ 241.6%
35K· 21.75 mi
8:57/mi
3:24:54
↑ 17↓ 861.7%
23M
9:14/mi
3:36:28
↑ 23↓ 630.6%
24M
9:14/mi
3:45:42
↓ 821.3%
40K· 24.85 mi
9:14/mi
3:53:36
↓ 200.3%
25.2M
9:43/mi
3:56:57
↑ 13↓ 160.2%
Finish· 26.22 mi
8:53/mi
4:06:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time2:03:24
Pace9:25 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time2:02:36
Pace9:21 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:5829:559:3829:55
9:38
-
10K
6.21 mi12:22:3459:319:3529:36
9:32
-0:06
15K
9.32 mi12:51:241:28:219:2928:50
9:17
-0:15
20K
12.43 mi13:20:171:57:149:2628:53
9:18
+0:01
Half
13.11 mi13:26:272:03:249:256:10
9:02
-0:16
25K
15.53 mi13:49:002:25:579:2422:33
9:18
+0:16
30K
18.64 mi14:18:342:55:319:2529:34
9:31
+0:13
20M
20.00 mi14:31:213:08:189:2512:47
9:24
-0:07
21M
21.00 mi14:41:153:18:129:269:54
9:54
+0:30
35K
21.75 mi14:47:573:24:549:256:42
8:57
-0:57
23M
23.00 mi14:59:313:36:289:2511:34
9:14
+0:17
24M
24.00 mi15:08:453:45:429:249:14
9:14
0:00
40K
24.85 mi15:16:393:53:369:247:54
9:14
0:00
25.2M
25.20 mi15:20:003:56:579:243:21
9:43
+0:29
Finish
26.22 mi15:29:034:06:009:239:03
8:53
-0:50

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

8:53 /mi

Average Pace

9:23 /mi

Slowest Pace

9:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:56:06

96% of race

Time at Steady Pace

9:54

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:23 /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 mi11:52:5829:559:3829:55
9:38
#22461
10K
6.21 mi12:22:3459:319:3529:36
9:32
#22553
15K
9.32 mi12:51:241:28:219:2928:50
9:17
#22233
20K
12.43 mi13:20:171:57:149:2628:53
9:18
#21904
Half
13.11 mi13:26:272:03:249:256:10
9:02
#21840
25K
15.53 mi13:49:002:25:579:2422:33
9:18
#21583
30K
18.64 mi14:18:342:55:319:2529:34
9:31
#21220
20M
20.00 mi14:31:213:08:189:2512:47
9:24
#21016
21M
21.00 mi14:41:153:18:129:269:54
9:54
#20821
35K
21.75 mi14:47:573:24:549:256:42
8:57
#20699
23M
23.00 mi14:59:313:36:289:2511:34
9:14
#20502
24M
24.00 mi15:08:453:45:429:249:14
9:14
#20404
40K
24.85 mi15:16:393:53:369:247:54
9:14
#20290
25.2M
25.20 mi15:20:003:56:579:243:21
9:43
#20238
Finish
26.22 mi15:29:034:06:009:239:03
8:53
#20158
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi224619112911221577(Top 81%)8544(Top 75%)8544(Top 708%)
10K6.21 mi3.10 mi22553-929122-109122-1022590(Top 85%)9135(Top 80%)9135(Top 757%)
15K9.32 mi3.11 mi22233+3208955+1678955+16721577(Top 81%)8544(Top 75%)8544(Top 708%)
20K12.43 mi3.11 mi21904+3298778+1778778+17720952(Top 79%)8207(Top 72%)8207(Top 680%)
Half13.11 mi0.68 mi21840+648735+438735+4320616(Top 77%)8029(Top 70%)8029(Top 665%)
25K15.53 mi2.42 mi21583+2578591+1448591+14420210(Top 76%)7815(Top 68%)7815(Top 647%)
30K18.64 mi3.11 mi21220+3638405+1868405+18619495(Top 73%)7470(Top 65%)7470(Top 619%)
20M20.00 mi1.36 mi21016+2048301+1048301+10418510(Top 70%)7040(Top 62%)7040(Top 583%)
21M21.00 mi1.00 mi20821+1958204+978204+9717681(Top 66%)6580(Top 58%)6580(Top 545%)
35K21.75 mi0.75 mi20699+1228145+598145+5917769(Top 67%)6717(Top 59%)6717(Top 557%)
23M23.00 mi1.25 mi20502+1978055+908055+9017218(Top 65%)6417(Top 56%)6417(Top 532%)
24M24.00 mi1.00 mi20404+988010+458010+4518223(Top 68%)7028(Top 62%)7028(Top 582%)
40K24.85 mi0.85 mi20290+1147955+557955+5517306(Top 65%)6578(Top 58%)6578(Top 545%)
25.2M25.20 mi0.35 mi20238+527928+277928+2716286(Top 61%)6053(Top 53%)6053(Top 501%)
Finish26.22 mi1.02 mi20158+807896+327896+3217450(Top 66%)6624(Top 58%)6624(Top 549%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

21577

Females

8544

F50-54

8544

5K→10K

3.1 - 6.2 mi

Top 85%
×5story building
+79ft-138ft

Overall

22590

Females

9135

F50-54

9135

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

21577

Females

8544

F50-54

8544

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

20952

Females

8207

F50-54

8207

20K→Half

12.4 - 13.1 mi

Top 77%
×2story building
+19ft-37ft

Overall

20616

Females

8029

F50-54

8029

Half→25K

13.1 - 15.5 mi

Top 76%
×4story building
+66ft-88ft

Overall

20210

Females

7815

F50-54

7815

25K→30K

15.5 - 18.6 mi

Top 73%
×9story building
+181ft-148ft

Overall

19495

Females

7470

F50-54

7470

30K→20M

18.6 - 20.0 mi

Top 70%
×5story building
+64ft-50ft

Overall

18510

Females

7040

F50-54

7040

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

17681

Females

6580

F50-54

6580

21M→35K

21.0 - 21.8 mi

Top 67%
×7story building
+17ft-86ft

Overall

17769

Females

6717

F50-54

6717

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

17218

Females

6417

F50-54

6417

23M→24M

23.0 - 24.0 mi

Top 68%
×6story building
+12ft-82ft

Overall

18223

Females

7028

F50-54

7028

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

17306

Females

6578

F50-54

6578

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

16286

Females

6053

F50-54

6053

25.2M→Finish

25.2 - 26.2 mi

Top 66%
×2story building
+22ft-21ft

Overall

17450

Females

6624

F50-54

6624

Passing Analysis

Category:
Athletes Passed
2698
Passed By
395
Net Change
+2303
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22461
5K → 10K195287-92#22461#22553
10K → 15K35636+320#22553#22233
15K → 20K35223+329#22233#21904
20K → Half684+64#21904#21840
Half → 25K2658+257#21840#21583
25K → 30K3729+363#21583#21220
30K → 20M2040+204#21220#21016
20M → 21M1961+195#21016#20821
21M → 35K1231+122#20821#20699
35K → 23M1992+197#20699#20502
23M → 24M1068+98#20502#20404
24M → 40K1195+114#20404#20290
40K → 25.2M542+52#20290#20238
25.2M → Finish899+80#20238#20158
TOTALS2698395+2303
📊

Passing Visuals

Category:
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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