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BOSTON MARATHON 2023

Belinda Ding

Bib: 23805•F

FL

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

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
8:37/mi
26:47
↑ 97↓ 3451.5%
10K· 6.21 mi
8:53/mi
54:22
↑ 79↓ 1380.4%
15K· 9.32 mi
9:33/mi
1:24:02
↑ 67↓ 78
20K· 12.43 mi
9:39/mi
1:54:02
↑ 106↓ 860.1%
Half· 13.11 mi
9:46/mi
2:00:42
↑ 19↓ 370.5%
25K· 15.53 mi
10:49/mi
2:26:56
↑ 66↓ 880.2%
30K· 18.64 mi
10:46/mi
3:00:23
↑ 181↓ 1480.2%
20M
10:54/mi
3:15:12
↑ 64↓ 500.2%
21M
12:36/mi
3:27:48
↑ 106↓ 241.6%
35K· 21.75 mi
9:57/mi
3:35:15
↑ 17↓ 861.7%
23M
9:57/mi
3:47:42
↑ 23↓ 630.6%
24M
10:13/mi
3:57:55
↓ 821.3%
40K· 24.85 mi
10:55/mi
4:07:15
↓ 200.3%
25.2M
12:05/mi
4:11:25
↑ 13↓ 160.2%
Finish· 26.22 mi
10:39/mi
4:22:16
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:00:42
Pace9:12 /mi
2nd Half
Distance13.11 mi
Time2:21:34
Pace10:48 /mi
📊Positive Split: 17.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:3626:478:3726:47
8:37
-
10K
6.21 mi11:50:1154:228:4527:35
8:53
+0:16
15K
9.32 mi12:19:511:24:029:0129:40
9:33
+0:40
20K
12.43 mi12:49:511:54:029:1130:00
9:39
+0:06
Half
13.11 mi12:56:312:00:429:126:40
9:46
+0:07
25K
15.53 mi13:22:452:26:569:2826:14
10:49
+1:03
30K
18.64 mi13:56:123:00:239:4133:27
10:46
-0:03
20M
20.00 mi14:11:013:15:129:4614:49
10:54
+0:08
21M
21.00 mi14:23:373:27:489:5412:36
12:36
+1:42
35K
21.75 mi14:31:043:35:159:547:27
9:57
-2:39
23M
23.00 mi14:43:313:47:429:5412:27
9:57
0:00
24M
24.00 mi14:53:443:57:559:5510:13
10:13
+0:16
40K
24.85 mi15:03:044:07:159:579:20
10:55
+0:42
25.2M
25.20 mi15:07:144:11:259:594:10
12:05
+1:10
Finish
26.22 mi15:18:054:22:1610:0110:51
10:39
-1:26

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

8:37 /mi

Average Pace

10:01 /mi

Slowest Pace

12:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:54:02

43% of race

Time at Steady Pace

47:38

18% of race

Time at Slower Pace

1:40:36

38% of race

Average Pace: 10:00 /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 mi11:22:3626:478:3726:47
8:37
#18368
10K
6.21 mi11:50:1154:228:4527:35
8:53
#19409
15K
9.32 mi12:19:511:24:029:0129:40
9:33
#20639
20K
12.43 mi12:49:511:54:029:1130:00
9:39
#21100
Half
13.11 mi12:56:312:00:429:126:40
9:46
#21202
25K
15.53 mi13:22:452:26:569:2826:14
10:49
#21762
30K
18.64 mi13:56:123:00:239:4133:27
10:46
#21996
20M
20.00 mi14:11:013:15:129:4614:49
10:54
#22051
21M
21.00 mi14:23:373:27:489:5412:36
12:36
#22166
35K
21.75 mi14:31:043:35:159:547:27
9:57
#22120
23M
23.00 mi14:43:313:47:429:5412:27
9:57
#22015
24M
24.00 mi14:53:443:57:559:5510:13
10:13
#21976
40K
24.85 mi15:03:044:07:159:579:20
10:55
#21978
25.2M
25.20 mi15:07:144:11:259:594:10
12:05
#21986
Finish
26.22 mi15:18:054:22:1610:0110:51
10:39
#22043
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi183686795679522393(Top 84%)9008(Top 79%)9008(Top 1105%)
10K6.21 mi3.10 mi19409-10417407-6127407-61220342(Top 76%)7896(Top 69%)7896(Top 969%)
15K9.32 mi3.11 mi20639-12308090-6838090-68322393(Top 84%)9008(Top 79%)9008(Top 1105%)
20K12.43 mi3.11 mi21100-4618328-2388328-23822031(Top 83%)8820(Top 77%)8820(Top 1082%)
Half13.11 mi0.68 mi21202-1028373-458373-4522807(Top 86%)9244(Top 81%)9244(Top 1134%)
25K15.53 mi2.42 mi21762-5608688-3158688-31523701(Top 89%)9788(Top 86%)9788(Top 1201%)
30K18.64 mi3.11 mi21996-2348831-1438831-14322728(Top 85%)9315(Top 82%)9315(Top 1143%)
20M20.00 mi1.36 mi22051-558876-458876-4522529(Top 85%)9261(Top 81%)9261(Top 1136%)
21M21.00 mi1.00 mi22166-1158947-718947-7123587(Top 89%)9852(Top 86%)9852(Top 1209%)
35K21.75 mi0.75 mi22120+468933+148933+1421172(Top 80%)8586(Top 75%)8586(Top 1053%)
23M23.00 mi1.25 mi22015+1058879+548879+5419836(Top 75%)7872(Top 69%)7872(Top 966%)
24M24.00 mi1.00 mi21976+398865+148865+1421385(Top 80%)8779(Top 77%)8779(Top 1077%)
40K24.85 mi0.85 mi21978-28877-128877-1222185(Top 83%)9229(Top 81%)9229(Top 1132%)
25.2M25.20 mi0.35 mi21986-88885-88885-822664(Top 85%)9482(Top 83%)9482(Top 1163%)
Finish26.22 mi1.02 mi22043-578925-408925-4023323(Top 88%)9816(Top 86%)9816(Top 1204%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

22393

Females

9008

F55-59

9008

5K→10K

3.1 - 6.2 mi

Top 76%
×5story building
+79ft-138ft

Overall

20342

Females

7896

F55-59

7896

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

22393

Females

9008

F55-59

9008

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

22031

Females

8820

F55-59

8820

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

22807

Females

9244

F55-59

9244

Half→25K

13.1 - 15.5 mi

Top 89%
×4story building
+66ft-88ft

Overall

23701

Females

9788

F55-59

9788

25K→30K

15.5 - 18.6 mi

Top 85%
×9story building
+181ft-148ft

Overall

22728

Females

9315

F55-59

9315

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

22529

Females

9261

F55-59

9261

20M→21M

20.0 - 21.0 mi

Top 89%
×8story building
+106ft-24ft

Overall

23587

Females

9852

F55-59

9852

21M→35K

21.0 - 21.8 mi

Top 80%
×7story building
+17ft-86ft

Overall

21172

Females

8586

F55-59

8586

35K→23M

21.8 - 23.0 mi

Top 75%
×5story building
+23ft-63ft

Overall

19836

Females

7872

F55-59

7872

23M→24M

23.0 - 24.0 mi

Top 80%
×6story building
+12ft-82ft

Overall

21385

Females

8779

F55-59

8779

24M→40K

24.0 - 24.9 mi

Top 83%
×1story
+6ft-20ft

Overall

22185

Females

9229

F55-59

9229

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22664

Females

9482

F55-59

9482

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

23323

Females

9816

F55-59

9816

Passing Analysis

Category:
Athletes Passed
589
Passed By
4264
Net Change
-3675
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18368
5K → 10K641105-1041#18368#19409
10K → 15K131243-1230#19409#20639
15K → 20K50511-461#20639#21100
20K → Half5107-102#21100#21202
Half → 25K11571-560#21202#21762
25K → 30K83317-234#21762#21996
30K → 20M4297-55#21996#22051
20M → 21M26141-115#22051#22166
21M → 35K548+46#22166#22120
35K → 23M11510+105#22120#22015
23M → 24M5920+39#22015#21976
24M → 40K3537-2#21976#21978
40K → 25.2M1422-8#21978#21986
25.2M → Finish1875-57#21986#22043
TOTALS5894264-3675
📊

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