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BOSTON MARATHON 2023

Chuen Ming Chen

Bib: 20413•F

NV

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
Masters (Masters Women)
#0 / 6539
Top 31%
Division (F40-44)
#0 / 1878
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
8:24/mi
26:06
↑ 97↓ 3451.5%
10K· 6.21 mi
8:18/mi
51:52
↑ 79↓ 1380.4%
15K· 9.32 mi
8:15/mi
1:17:31
↑ 67↓ 78
20K· 12.43 mi
8:23/mi
1:43:33
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:49:10
↑ 19↓ 370.5%
25K· 15.53 mi
8:29/mi
2:09:44
↑ 66↓ 880.2%
30K· 18.64 mi
8:44/mi
2:36:53
↑ 181↓ 1480.2%
20M
8:41/mi
2:48:41
↑ 64↓ 500.2%
21M
9:10/mi
2:57:51
↑ 106↓ 241.6%
35K· 21.75 mi
8:15/mi
3:04:01
↑ 17↓ 861.7%
23M
8:25/mi
3:14:33
↑ 23↓ 630.6%
24M
8:06/mi
3:22:39
↓ 821.3%
40K· 24.85 mi
8:15/mi
3:29:42
↓ 200.3%
25.2M
8:30/mi
3:32:38
↑ 13↓ 160.2%
Finish· 26.22 mi
7:38/mi
3:40:25
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:10
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time1:51:15
Pace8:29 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:0826:068:2426:06
8:24
-
10K
6.21 mi11:49:5451:528:2125:46
8:18
-0:06
15K
9.32 mi12:15:331:17:318:1925:39
8:15
-0:03
20K
12.43 mi12:41:351:43:338:2026:02
8:23
+0:08
Half
13.11 mi12:47:121:49:108:205:37
8:14
-0:09
25K
15.53 mi13:07:462:09:448:2120:34
8:29
+0:15
30K
18.64 mi13:34:552:36:538:2527:09
8:44
+0:15
20M
20.00 mi13:46:432:48:418:2611:48
8:41
-0:03
21M
21.00 mi13:55:532:57:518:289:10
9:10
+0:29
35K
21.75 mi14:02:033:04:018:286:10
8:15
-0:55
23M
23.00 mi14:12:353:14:338:2810:32
8:25
+0:10
24M
24.00 mi14:20:413:22:398:278:06
8:06
-0:19
40K
24.85 mi14:27:443:29:428:267:03
8:15
+0:09
25.2M
25.20 mi14:30:403:32:388:262:56
8:30
+0:15
Finish
26.22 mi14:38:273:40:258:257:47
7:38
-0:52

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

7:38 /mi

Average Pace

8:25 /mi

Slowest Pace

9:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

15:53

7% of race

Time at Steady Pace

2:36:25

71% of race

Time at Slower Pace

48:07

22% of race

Average Pace: 8:24 /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 mi11:24:0826:068:2426:06
8:24
#16886
10K
6.21 mi11:49:5451:528:2125:46
8:18
#16834
15K
9.32 mi12:15:331:17:318:1925:39
8:15
#16634
20K
12.43 mi12:41:351:43:338:2026:02
8:23
#16503
Half
13.11 mi12:47:121:49:108:205:37
8:14
#16479
25K
15.53 mi13:07:462:09:448:2120:34
8:29
#16422
30K
18.64 mi13:34:552:36:538:2527:09
8:44
#16251
20M
20.00 mi13:46:432:48:418:2611:48
8:41
#16127
21M
21.00 mi13:55:532:57:518:289:10
9:10
#15987
35K
21.75 mi14:02:033:04:018:286:10
8:15
#15869
23M
23.00 mi14:12:353:14:338:2810:32
8:25
#15673
24M
24.00 mi14:20:413:22:398:278:06
8:06
#15512
40K
24.85 mi14:27:443:29:428:267:03
8:15
#15375
25.2M
25.20 mi14:30:403:32:388:262:56
8:30
#15273
Finish
26.22 mi14:38:273:40:258:257:47
7:38
#15044
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi168865848584816259(Top 61%)5444(Top 48%)5444(Top 290%)
10K6.21 mi3.10 mi16834+525795+535795+5316889(Top 63%)5802(Top 51%)5802(Top 309%)
15K9.32 mi3.11 mi16634+2005682+1135682+11316259(Top 61%)5444(Top 48%)5444(Top 290%)
20K12.43 mi3.11 mi16503+1315615+675615+6716120(Top 61%)5422(Top 47%)5422(Top 289%)
Half13.11 mi0.68 mi16479+245601+145601+1416048(Top 60%)5316(Top 47%)5316(Top 283%)
25K15.53 mi2.42 mi16422+575592+95592+916085(Top 60%)5492(Top 48%)5492(Top 292%)
30K18.64 mi3.11 mi16251+1715539+535539+5315718(Top 59%)5333(Top 47%)5333(Top 284%)
20M20.00 mi1.36 mi16127+1245470+695470+6914767(Top 55%)4867(Top 43%)4867(Top 259%)
21M21.00 mi1.00 mi15987+1405404+665404+6614329(Top 54%)4677(Top 41%)4677(Top 249%)
35K21.75 mi0.75 mi15869+1185353+515353+5113798(Top 52%)4461(Top 39%)4461(Top 238%)
23M23.00 mi1.25 mi15673+1965268+855268+8512699(Top 48%)3912(Top 34%)3912(Top 208%)
24M24.00 mi1.00 mi15512+1615184+845184+8411989(Top 45%)3590(Top 31%)3590(Top 191%)
40K24.85 mi0.85 mi15375+1375110+745110+7411724(Top 44%)3536(Top 31%)3536(Top 188%)
25.2M25.20 mi0.35 mi15273+1025053+575053+579707(Top 36%)2590(Top 23%)2590(Top 138%)
Finish26.22 mi1.02 mi15044+2294934+1194934+1199600(Top 36%)2530(Top 22%)2530(Top 135%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

16259

Females

5444

F40-44

5444

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

16889

Females

5802

F40-44

5802

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

16259

Females

5444

F40-44

5444

15K→20K

9.3 - 12.4 mi

Top 61%
×5story building
+106ft-86ft

Overall

16120

Females

5422

F40-44

5422

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

16048

Females

5316

F40-44

5316

Half→25K

13.1 - 15.5 mi

Top 60%
×4story building
+66ft-88ft

Overall

16085

Females

5492

F40-44

5492

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

15718

Females

5333

F40-44

5333

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

14767

Females

4867

F40-44

4867

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

14329

Females

4677

F40-44

4677

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

13798

Females

4461

F40-44

4461

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

12699

Females

3912

F40-44

3912

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

11989

Females

3590

F40-44

3590

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

11724

Females

3536

F40-44

3536

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

9707

Females

2590

F40-44

2590

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

9600

Females

2530

F40-44

2530

Passing Analysis

Category:
Athletes Passed
2627
Passed By
785
Net Change
+1842
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16886
5K → 10K333281+52#16886#16834
10K → 15K307107+200#16834#16634
15K → 20K231100+131#16634#16503
20K → Half4319+24#16503#16479
Half → 25K163106+57#16479#16422
25K → 30K271100+171#16422#16251
30K → 20M14723+124#16251#16127
20M → 21M15414+140#16127#15987
21M → 35K1224+118#15987#15869
35K → 23M20812+196#15869#15673
23M → 24M1654+161#15673#15512
24M → 40K15114+137#15512#15375
40K → 25.2M1020+102#15375#15273
25.2M → Finish2301+229#15273#15044
TOTALS2627785+1842
📊

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