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BOSTON MARATHON 2023

Chunhua Liu

Bib: 13966•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 29%
Gender (Female)
#0 / 11423
Top 10%
Masters (Masters Women)
#0 / 6539
Top 3%
Division (F50-54)
#0 / 1207
Top 1.0%
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
7:30/mi
23:18
↑ 97↓ 3451.5%
10K· 6.21 mi
7:14/mi
45:46
↑ 79↓ 1380.4%
15K· 9.32 mi
7:17/mi
1:08:23
↑ 67↓ 78
20K· 12.43 mi
7:26/mi
1:31:28
↑ 106↓ 860.1%
Half· 13.11 mi
7:17/mi
1:36:26
↑ 19↓ 370.5%
25K· 15.53 mi
7:23/mi
1:54:20
↑ 66↓ 880.2%
30K· 18.64 mi
7:30/mi
2:17:38
↑ 181↓ 1480.2%
20M
7:24/mi
2:27:41
↑ 64↓ 500.2%
21M
8:07/mi
2:35:48
↑ 106↓ 241.6%
35K· 21.75 mi
7:12/mi
2:41:11
↑ 17↓ 861.7%
23M
7:37/mi
2:50:43
↑ 23↓ 630.6%
24M
7:21/mi
2:58:04
↓ 821.3%
40K· 24.85 mi
7:23/mi
3:04:23
↓ 200.3%
25.2M
7:56/mi
3:07:07
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:14:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:26
Pace7:21 /mi
2nd Half
Distance13.11 mi
Time1:38:16
Pace7:30 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:5723:187:3023:18
7:30
-
10K
6.21 mi11:13:2545:467:2222:28
7:14
-0:16
15K
9.32 mi11:36:021:08:237:2022:37
7:17
+0:03
20K
12.43 mi11:59:071:31:287:2223:05
7:26
+0:09
Half
13.11 mi12:04:051:36:267:214:58
7:17
-0:09
25K
15.53 mi12:21:591:54:207:2217:54
7:23
+0:06
30K
18.64 mi12:45:172:17:387:2323:18
7:30
+0:07
20M
20.00 mi12:55:202:27:417:2310:03
7:24
-0:06
21M
21.00 mi13:03:272:35:487:258:07
8:07
+0:43
35K
21.75 mi13:08:502:41:117:255:23
7:12
-0:55
23M
23.00 mi13:18:222:50:437:259:32
7:37
+0:25
24M
24.00 mi13:25:432:58:047:257:21
7:21
-0:16
40K
24.85 mi13:32:023:04:237:256:19
7:23
+0:02
25.2M
25.20 mi13:34:463:07:077:262:44
7:56
+0:33
Finish
26.22 mi13:42:213:14:427:267:35
7:26
-0:30

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

7:12 /mi

Average Pace

7:26 /mi

Slowest Pace

8:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:03:51

94% of race

Time at Steady Pace

10:51

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:26 /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 mi10:50:5723:187:3023:18
7:30
#9642
10K
6.21 mi11:13:2545:467:2222:28
7:14
#8935
15K
9.32 mi11:36:021:08:237:2022:37
7:17
#8745
20K
12.43 mi11:59:071:31:287:2223:05
7:26
#8705
Half
13.11 mi12:04:051:36:267:214:58
7:17
#8682
25K
15.53 mi12:21:591:54:207:2217:54
7:23
#8514
30K
18.64 mi12:45:172:17:387:2323:18
7:30
#8245
20M
20.00 mi12:55:202:27:417:2310:03
7:24
#8050
21M
21.00 mi13:03:272:35:487:258:07
8:07
#8024
35K
21.75 mi13:08:502:41:117:255:23
7:12
#7944
23M
23.00 mi13:18:222:50:437:259:32
7:37
#7869
24M
24.00 mi13:25:432:58:047:257:21
7:21
#7787
40K
24.85 mi13:32:023:04:237:256:19
7:23
#7693
25.2M
25.20 mi13:34:463:07:077:262:44
7:56
#7657
Finish
26.22 mi13:42:213:14:427:267:35
7:26
#7648
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi9642167616768410(Top 32%)1214(Top 11%)1214(Top 101%)
10K6.21 mi3.10 mi8935+7071385+2911385+2918349(Top 31%)1168(Top 10%)1168(Top 97%)
15K9.32 mi3.11 mi8745+1901325+601325+608410(Top 32%)1214(Top 11%)1214(Top 101%)
20K12.43 mi3.11 mi8705+401317+81317+88754(Top 33%)1391(Top 12%)1391(Top 115%)
Half13.11 mi0.68 mi8682+231309+81309+88494(Top 32%)1273(Top 11%)1273(Top 105%)
25K15.53 mi2.42 mi8514+1681264+451264+457890(Top 30%)1148(Top 10%)1148(Top 95%)
30K18.64 mi3.11 mi8245+2691207+571207+577222(Top 27%)1005(Top 9%)1005(Top 83%)
20M20.00 mi1.36 mi8050+1951151+561151+566187(Top 23%)754(Top 7%)754(Top 62%)
21M21.00 mi1.00 mi8024+261160-91160-98130(Top 31%)1568(Top 14%)1568(Top 130%)
35K21.75 mi0.75 mi7944+801141+191141+196545(Top 25%)938(Top 8%)938(Top 78%)
23M23.00 mi1.25 mi7869+751136+51136+57205(Top 27%)1247(Top 11%)1247(Top 103%)
24M24.00 mi1.00 mi7787+821129+71129+76747(Top 25%)1169(Top 10%)1169(Top 97%)
40K24.85 mi0.85 mi7693+941108+211108+216038(Top 23%)996(Top 9%)996(Top 83%)
25.2M25.20 mi0.35 mi7657+36110811086158(Top 23%)1108(Top 10%)1108(Top 92%)
Finish26.22 mi1.02 mi7648+91125-171125-178104(Top 30%)1868(Top 16%)1868(Top 155%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

8410

Females

1214

F50-54

1214

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8349

Females

1168

F50-54

1168

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

8410

Females

1214

F50-54

1214

15K→20K

9.3 - 12.4 mi

Top 33%
×5story building
+106ft-86ft

Overall

8754

Females

1391

F50-54

1391

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8494

Females

1273

F50-54

1273

Half→25K

13.1 - 15.5 mi

Top 30%
×4story building
+66ft-88ft

Overall

7890

Females

1148

F50-54

1148

25K→30K

15.5 - 18.6 mi

Top 27%
×9story building
+181ft-148ft

Overall

7222

Females

1005

F50-54

1005

30K→20M

18.6 - 20.0 mi

Top 23%
×5story building
+64ft-50ft

Overall

6187

Females

754

F50-54

754

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8130

Females

1568

F50-54

1568

21M→35K

21.0 - 21.8 mi

Top 25%
×7story building
+17ft-86ft

Overall

6545

Females

938

F50-54

938

35K→23M

21.8 - 23.0 mi

Top 27%
×5story building
+23ft-63ft

Overall

7205

Females

1247

F50-54

1247

23M→24M

23.0 - 24.0 mi

Top 25%
×6story building
+12ft-82ft

Overall

6747

Females

1169

F50-54

1169

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6038

Females

996

F50-54

996

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6158

Females

1108

F50-54

1108

25.2M→Finish

25.2 - 26.2 mi

Top 30%
×2story building
+22ft-21ft

Overall

8104

Females

1868

F50-54

1868

Passing Analysis

Category:
Athletes Passed
2514
Passed By
520
Net Change
+1994
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9642
5K → 10K76861+707#9642#8935
10K → 15K25161+190#8935#8745
15K → 20K146106+40#8745#8705
20K → Half3714+23#8705#8682
Half → 25K18921+168#8682#8514
25K → 30K30233+269#8514#8245
30K → 20M20510+195#8245#8050
20M → 21M8256+26#8050#8024
21M → 35K888+80#8024#7944
35K → 23M11338+75#7944#7869
23M → 24M10927+82#7869#7787
24M → 40K10915+94#7787#7693
40K → 25.2M5115+36#7693#7657
25.2M → Finish6455+9#7657#7648
TOTALS2514520+1994
📊

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