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BOSTON MARATHON 2023

Ling Chu

Bib: 17204•F

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 17%
Masters (Masters Women)
#0 / 6539
Top 7%
Division (F50-54)
#0 / 1207
Top 3%
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
7:47/mi
24:10
↑ 97↓ 3451.5%
10K· 6.21 mi
7:24/mi
47:09
↑ 79↓ 1380.4%
15K· 9.32 mi
7:25/mi
1:10:12
↑ 67↓ 78
20K· 12.43 mi
7:34/mi
1:33:41
↑ 106↓ 860.1%
Half· 13.11 mi
7:23/mi
1:38:43
↑ 19↓ 370.5%
25K· 15.53 mi
7:37/mi
1:57:10
↑ 66↓ 880.2%
30K· 18.64 mi
7:47/mi
2:21:20
↑ 181↓ 1480.2%
20M
7:52/mi
2:32:02
↑ 64↓ 500.2%
21M
8:19/mi
2:40:21
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
2:46:16
↑ 17↓ 861.7%
23M
8:06/mi
2:56:25
↑ 23↓ 630.6%
24M
7:51/mi
3:04:16
↓ 821.3%
40K· 24.85 mi
7:55/mi
3:11:02
↓ 200.3%
25.2M
8:22/mi
3:13:55
↑ 13↓ 160.2%
Finish· 26.22 mi
7:32/mi
3:21:36
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:43
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:42:53
Pace7:51 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:4824:107:4724:10
7:47
-
10K
6.21 mi11:37:4747:097:3522:59
7:24
-0:23
15K
9.32 mi12:00:501:10:127:3223:03
7:25
+0:01
20K
12.43 mi12:24:191:33:417:3223:29
7:34
+0:09
Half
13.11 mi12:29:211:38:437:325:02
7:23
-0:11
25K
15.53 mi12:47:481:57:107:3318:27
7:37
+0:14
30K
18.64 mi13:11:582:21:207:3524:10
7:47
+0:10
20M
20.00 mi13:22:402:32:027:3610:42
7:52
+0:05
21M
21.00 mi13:30:592:40:217:388:19
8:19
+0:27
35K
21.75 mi13:36:542:46:167:395:55
7:55
-0:24
23M
23.00 mi13:47:032:56:257:4010:09
8:06
+0:11
24M
24.00 mi13:54:543:04:167:417:51
7:51
-0:15
40K
24.85 mi14:01:403:11:027:416:46
7:55
+0:04
25.2M
25.20 mi14:04:333:13:557:422:53
8:22
+0:27
Finish
26.22 mi14:12:143:21:367:427:41
7:32
-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

7:23 /mi

Average Pace

7:42 /mi

Slowest Pace

8:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:10:24

94% of race

Time at Steady Pace

11:12

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:41 /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 mi11:14:4824:107:4724:10
7:47
#12164
10K
6.21 mi11:37:4747:097:3522:59
7:24
#10824
15K
9.32 mi12:00:501:10:127:3223:03
7:25
#10346
20K
12.43 mi12:24:191:33:417:3223:29
7:34
#10178
Half
13.11 mi12:29:211:38:437:325:02
7:23
#10109
25K
15.53 mi12:47:481:57:107:3318:27
7:37
#9996
30K
18.64 mi13:11:582:21:207:3524:10
7:47
#9837
20M
20.00 mi13:22:402:32:027:3610:42
7:52
#9753
21M
21.00 mi13:30:592:40:217:388:19
8:19
#9708
35K
21.75 mi13:36:542:46:167:395:55
7:55
#9751
23M
23.00 mi13:47:032:56:257:4010:09
8:06
#9783
24M
24.00 mi13:54:543:04:167:417:51
7:51
#9758
40K
24.85 mi14:01:403:11:027:416:46
7:55
#9721
25.2M
25.20 mi14:04:333:13:557:422:53
8:22
#9685
Finish
26.22 mi14:12:143:21:367:427:41
7:32
#9620
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi12164295429549524(Top 36%)1630(Top 14%)1630(Top 135%)
10K6.21 mi3.10 mi10824+13402236+7182236+7189625(Top 36%)1668(Top 15%)1668(Top 138%)
15K9.32 mi3.11 mi10346+4781981+2551981+2559524(Top 36%)1630(Top 14%)1630(Top 135%)
20K12.43 mi3.11 mi10178+1681915+661915+669778(Top 37%)1819(Top 16%)1819(Top 151%)
Half13.11 mi0.68 mi10109+691888+271888+279325(Top 35%)1617(Top 14%)1617(Top 134%)
25K15.53 mi2.42 mi9996+1131857+311857+319635(Top 36%)1838(Top 16%)1838(Top 152%)
30K18.64 mi3.11 mi9837+1591815+421815+429211(Top 35%)1803(Top 16%)1803(Top 149%)
20M20.00 mi1.36 mi9753+841811+41811+49411(Top 35%)1979(Top 17%)1979(Top 164%)
21M21.00 mi1.00 mi9708+451806+51806+59349(Top 35%)2074(Top 18%)2074(Top 172%)
35K21.75 mi0.75 mi9751-431846-401846-4011459(Top 43%)3099(Top 27%)3099(Top 257%)
23M23.00 mi1.25 mi9783-321904-581904-5810523(Top 40%)2772(Top 24%)2772(Top 230%)
24M24.00 mi1.00 mi9758+251915-111915-1110172(Top 38%)2665(Top 23%)2665(Top 221%)
40K24.85 mi0.85 mi9721+371922-71922-79464(Top 36%)2379(Top 21%)2379(Top 197%)
25.2M25.20 mi0.35 mi9685+361921+11921+18721(Top 33%)2124(Top 19%)2124(Top 176%)
Finish26.22 mi1.02 mi9620+651924-31924-38870(Top 33%)2183(Top 19%)2183(Top 181%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21story building
+97ft-345ft

Overall

9524

Females

1630

F50-54

1630

5K→10K

3.1 - 6.2 mi

Top 36%
×5story building
+79ft-138ft

Overall

9625

Females

1668

F50-54

1668

10K→15K

6.2 - 9.3 mi

Top 36%
×3story building
+67ft-78ft

Overall

9524

Females

1630

F50-54

1630

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

9778

Females

1819

F50-54

1819

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9325

Females

1617

F50-54

1617

Half→25K

13.1 - 15.5 mi

Top 36%
×4story building
+66ft-88ft

Overall

9635

Females

1838

F50-54

1838

25K→30K

15.5 - 18.6 mi

Top 35%
×9story building
+181ft-148ft

Overall

9211

Females

1803

F50-54

1803

30K→20M

18.6 - 20.0 mi

Top 35%
×5story building
+64ft-50ft

Overall

9411

Females

1979

F50-54

1979

20M→21M

20.0 - 21.0 mi

Top 35%
×8story building
+106ft-24ft

Overall

9349

Females

2074

F50-54

2074

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11459

Females

3099

F50-54

3099

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

10523

Females

2772

F50-54

2772

23M→24M

23.0 - 24.0 mi

Top 38%
×6story building
+12ft-82ft

Overall

10172

Females

2665

F50-54

2665

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9464

Females

2379

F50-54

2379

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8721

Females

2124

F50-54

2124

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2story building
+22ft-21ft

Overall

8870

Females

2183

F50-54

2183

Passing Analysis

Category:
Athletes Passed
3265*
Passed By
721
Net Change
+2544
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12164
5K → 10K137131+1340#12164#10824
10K → 15K51739+478#10824#10346
15K → 20K243*75+168#10346#10178
20K → Half79*10+69#10178#10109
Half → 25K181*68+113#10109#9996
25K → 30K236*77+159#9996#9837
30K → 20M12844+84#9837#9753
20M → 21M9348+45#9753#9708
21M → 35K3275-43#9708#9751
35K → 23M86118-32#9751#9783
23M → 24M6742+25#9783#9758
24M → 40K81*44+37#9758#9721
40K → 25.2M4913+36#9721#9685
25.2M → Finish102*37+65#9685#9620
TOTALS3265*721+2544

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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