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BOSTON MARATHON 2023

Jiajun Liu

Bib: 22757•F

GA

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
Top 48%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:36
Rank: #19911
Start → 5K
27:36 | 8:53/mi
10K· 6.21 mi
54:43
Rank: #19717 (+194)
5K → 10K
27:07 | 8:44/mi
15K· 9.32 mi
1:22:03
Rank: #19621 (+96)
10K → 15K
27:20 | 8:48/mi
20K· 12.43 mi
1:49:15
Rank: #19286 (+335)
15K → 20K
27:12 | 8:45/mi
Half· 13.11 mi
1:55:03
Rank: #19208 (+78)
20K → Half
5:48 | 8:30/mi
25K· 15.53 mi
2:16:20
Rank: #18977 (+231)
Half → 25K
21:17 | 8:47/mi
30K· 18.64 mi
2:44:04
Rank: #18592 (+385)
25K → 30K
27:44 | 8:56/mi
20M
2:56:13
Rank: #18404 (+188)
30K → 20M
12:09 | 8:56/mi
21M
3:05:41
Rank: #18240 (+164)
20M → 21M
9:28 | 9:28/mi
35K· 21.75 mi
3:12:17
Rank: #18180 (+60)
21M → 35K
6:36 | 8:49/mi
23M
3:23:50
Rank: #18112 (+68)
35K → 23M
11:33 | 9:13/mi
24M
3:32:49
Rank: #18080 (+32)
23M → 24M
8:59 | 8:59/mi
40K· 24.85 mi
3:40:50
Rank: #18077 (+3)
24M → 40K
8:01 | 9:23/mi
25.2M
3:44:12
Rank: #18053 (+24)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:53:03
Rank: #17985 (+68)
25.2M → Finish
8:51 | 8:41/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:03
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time1:58:00
Pace9:00 /mi
📊Positive Split: 2.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:1427:368:5327:36
8:53
-
10K
6.21 mi11:51:2154:438:4827:07
8:44
-0:09
15K
9.32 mi12:18:411:22:038:4827:20
8:48
+0:04
20K
12.43 mi12:45:531:49:158:4727:12
8:45
-0:03
Half
13.11 mi12:51:411:55:038:475:48
8:30
-0:15
25K
15.53 mi13:12:582:16:208:4721:17
8:47
+0:17
30K
18.64 mi13:40:422:44:048:4827:44
8:56
+0:09
20M
20.00 mi13:52:512:56:138:4912:09
8:56
0:00
21M
21.00 mi14:02:193:05:418:519:28
9:28
+0:32
35K
21.75 mi14:08:553:12:178:506:36
8:49
-0:39
23M
23.00 mi14:20:283:23:508:5211:33
9:13
+0:24
24M
24.00 mi14:29:273:32:498:528:59
8:59
-0:14
40K
24.85 mi14:37:283:40:508:538:01
9:23
+0:24
25.2M
25.20 mi14:40:503:44:128:543:22
9:46
+0:23
Finish
26.22 mi14:49:413:53:038:548:51
8:41
-1:05

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

8:30 /mi

Average Pace

8:54 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:32:12

91% of race

Time at Steady Pace

20:51

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:53 /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 mi11:24:1427:368:5327:36
8:53
#19911
10K
6.21 mi11:51:2154:438:4827:07
8:44
#19717
15K
9.32 mi12:18:411:22:038:4827:20
8:48
#19621
20K
12.43 mi12:45:531:49:158:4727:12
8:45
#19286
Half
13.11 mi12:51:411:55:038:475:48
8:30
#19208
25K
15.53 mi13:12:582:16:208:4721:17
8:47
#18977
30K
18.64 mi13:40:422:44:048:4827:44
8:56
#18592
20M
20.00 mi13:52:512:56:138:4912:09
8:56
#18404
21M
21.00 mi14:02:193:05:418:519:28
9:28
#18240
35K
21.75 mi14:08:553:12:178:506:36
8:49
#18180
23M
23.00 mi14:20:283:23:508:5211:33
9:13
#18112
24M
24.00 mi14:29:273:32:498:528:59
8:59
#18080
40K
24.85 mi14:37:283:40:508:538:01
9:23
#18077
25.2M
25.20 mi14:40:503:44:128:543:22
9:46
#18053
Finish
26.22 mi14:49:413:53:038:548:51
8:41
#17985
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi199117750775019502(Top 73%)7390(Top 65%)7390(Top 612%)
10K6.21 mi3.10 mi19717+1947599+1517599+15119576(Top 74%)7433(Top 65%)7433(Top 616%)
15K9.32 mi3.11 mi19621+967526+737526+7319502(Top 73%)7390(Top 65%)7390(Top 612%)
20K12.43 mi3.11 mi19286+3357295+2317295+23118443(Top 69%)6760(Top 59%)6760(Top 560%)
Half13.11 mi0.68 mi19208+787240+557240+5517767(Top 67%)6345(Top 56%)6345(Top 526%)
25K15.53 mi2.42 mi18977+2317108+1327108+13217842(Top 67%)6486(Top 57%)6486(Top 537%)
30K18.64 mi3.11 mi18592+3856916+1926916+19216813(Top 63%)5958(Top 52%)5958(Top 494%)
20M20.00 mi1.36 mi18404+1886814+1026814+10216255(Top 61%)5726(Top 50%)5726(Top 474%)
21M21.00 mi1.00 mi18240+1646742+726742+7215839(Top 59%)5542(Top 49%)5542(Top 459%)
35K21.75 mi0.75 mi18180+606710+326710+3217097(Top 64%)6335(Top 55%)6335(Top 525%)
23M23.00 mi1.25 mi18112+686678+326678+3217190(Top 65%)6392(Top 56%)6392(Top 530%)
24M24.00 mi1.00 mi18080+326676+26676+217176(Top 65%)6455(Top 57%)6455(Top 535%)
40K24.85 mi0.85 mi18077+36682-66682-617867(Top 67%)6875(Top 60%)6875(Top 570%)
25.2M25.20 mi0.35 mi18053+246676+66676+616432(Top 62%)6126(Top 54%)6126(Top 508%)
Finish26.22 mi1.02 mi17985+686646+306646+3016427(Top 62%)6064(Top 53%)6064(Top 502%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 73%
×21stories
+97ft-345ft

Overall

19502

Females

7390

F50-54

7390

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

19576

Females

7433

F50-54

7433

10K→15K

6.2 - 9.3 mi

Top 73%
×3stories
+67ft-78ft

Overall

19502

Females

7390

F50-54

7390

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

18443

Females

6760

F50-54

6760

20K→Half

12.4 - 13.1 mi

Top 67%
×2stories
+19ft-37ft

Overall

17767

Females

6345

F50-54

6345

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

17842

Females

6486

F50-54

6486

25K→30K

15.5 - 18.6 mi

Top 63%
×9stories
+181ft-148ft

Overall

16813

Females

5958

F50-54

5958

30K→20M

18.6 - 20.0 mi

Top 61%
×5stories
+64ft-50ft

Overall

16255

Females

5726

F50-54

5726

20M→21M

20.0 - 21.0 mi

Top 59%
×8stories
+106ft-24ft

Overall

15839

Females

5542

F50-54

5542

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

17097

Females

6335

F50-54

6335

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

17190

Females

6392

F50-54

6392

23M→24M

23.0 - 24.0 mi

Top 65%
×6stories
+12ft-82ft

Overall

17176

Females

6455

F50-54

6455

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

17867

Females

6875

F50-54

6875

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

16432

Females

6126

F50-54

6126

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

16427

Females

6064

F50-54

6064

Passing Analysis

Category:
Athletes Passed
2575
Passed By
649
Net Change
+1926
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19911
5K → 10K409215+194#19911#19717
10K → 15K233137+96#19717#19621
15K → 20K36530+335#19621#19286
20K → Half780+78#19286#19208
Half → 25K25120+231#19208#18977
25K → 30K41025+385#18977#18592
30K → 20M20214+188#18592#18404
20M → 21M18925+164#18404#18240
21M → 35K8222+60#18240#18180
35K → 23M10335+68#18180#18112
23M → 24M7442+32#18112#18080
24M → 40K5047+3#18080#18077
40K → 25.2M3612+24#18077#18053
25.2M → Finish9325+68#18053#17985
TOTALS2575649+1926
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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