Boston Marathon logo
BOSTON MARATHON 2023

Ying Liu

Bib: 13639•F

NC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 16%
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

Start
0:00:00
Race begins
5K· 3.11 mi
23:29
Rank: #10157
Start → 5K
23:29 | 7:34/mi
10K· 6.21 mi
46:45
Rank: #10259 (-102)
5K → 10K
23:16 | 7:29/mi
15K· 9.32 mi
1:10:05
Rank: #10235 (+24)
10K → 15K
23:20 | 7:31/mi
20K· 12.43 mi
1:33:36
Rank: #10112 (+123)
15K → 20K
23:31 | 7:34/mi
Half· 13.11 mi
1:38:42
Rank: #10096 (+16)
20K → Half
5:06 | 7:29/mi
25K· 15.53 mi
1:57:08
Rank: #9979 (+117)
Half → 25K
18:26 | 7:36/mi
30K· 18.64 mi
2:21:22
Rank: #9847 (+132)
25K → 30K
24:14 | 7:48/mi
20M
2:32:06
Rank: #9774 (+73)
30K → 20M
10:44 | 7:54/mi
21M
2:40:30
Rank: #9752 (+22)
20M → 21M
8:24 | 8:24/mi
35K· 21.75 mi
2:46:08
Rank: #9707 (+45)
21M → 35K
5:38 | 7:32/mi
23M
2:55:59
Rank: #9623 (+84)
35K → 23M
9:51 | 7:52/mi
24M
3:03:39
Rank: #9569 (+54)
23M → 24M
7:40 | 7:40/mi
40K· 24.85 mi
3:10:21
Rank: #9504 (+65)
24M → 40K
6:42 | 7:50/mi
25.2M
3:13:20
Rank: #9499 (+5)
40K → 25.2M
2:59 | 8:39/mi
Finish· 26.22 mi
3:21:18
Rank: #9537 (-38)
25.2M → Finish
7:58 | 7:49/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:42
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:42:36
Pace7:50 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5923:297:3423:29
7:34
-
10K
6.21 mi11:15:1546:457:3123:16
7:29
-0:05
15K
9.32 mi11:38:351:10:057:3123:20
7:31
+0:02
20K
12.43 mi12:02:061:33:367:3223:31
7:34
+0:03
Half
13.11 mi12:07:121:38:427:325:06
7:29
-0:05
25K
15.53 mi12:25:381:57:087:3218:26
7:36
+0:07
30K
18.64 mi12:49:522:21:227:3524:14
7:48
+0:12
20M
20.00 mi13:00:362:32:067:3610:44
7:54
+0:06
21M
21.00 mi13:09:002:40:307:398:24
8:24
+0:30
35K
21.75 mi13:14:382:46:087:385:38
7:32
-0:52
23M
23.00 mi13:24:292:55:597:399:51
7:52
+0:20
24M
24.00 mi13:32:093:03:397:397:40
7:40
-0:12
40K
24.85 mi13:38:513:10:217:406:42
7:50
+0:10
25.2M
25.20 mi13:41:503:13:207:402:59
8:39
+0:49
Finish
26.22 mi13:49:483:21:187:417:58
7:49
-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

7:29 /mi

Average Pace

7:41 /mi

Slowest Pace

8:39 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:09:55

94% of race

Time at Steady Pace

11:23

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 mi10:51:5923:297:3423:29
7:34
#10157
10K
6.21 mi11:15:1546:457:3123:16
7:29
#10259
15K
9.32 mi11:38:351:10:057:3123:20
7:31
#10235
20K
12.43 mi12:02:061:33:367:3223:31
7:34
#10112
Half
13.11 mi12:07:121:38:427:325:06
7:29
#10096
25K
15.53 mi12:25:381:57:087:3218:26
7:36
#9979
30K
18.64 mi12:49:522:21:227:3524:14
7:48
#9847
20M
20.00 mi13:00:362:32:067:3610:44
7:54
#9774
21M
21.00 mi13:09:002:40:307:398:24
8:24
#9752
35K
21.75 mi13:14:382:46:087:385:38
7:32
#9707
23M
23.00 mi13:24:292:55:597:399:51
7:52
#9623
24M
24.00 mi13:32:093:03:397:397:40
7:40
#9569
40K
24.85 mi13:38:513:10:217:406:42
7:50
#9504
25.2M
25.20 mi13:41:503:13:207:402:59
8:39
#9499
Finish
26.22 mi13:49:483:21:187:417:58
7:49
#9537
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi101571938193810271(Top 39%)1969(Top 17%)1969(Top 163%)
10K6.21 mi3.10 mi10259-1021953-151953-1510371(Top 39%)1987(Top 17%)1987(Top 165%)
15K9.32 mi3.11 mi10235+241929+241929+2410271(Top 39%)1969(Top 17%)1969(Top 163%)
20K12.43 mi3.11 mi10112+1231883+461883+469864(Top 37%)1855(Top 16%)1855(Top 154%)
Half13.11 mi0.68 mi10096+161879+41879+410085(Top 38%)1921(Top 17%)1921(Top 159%)
25K15.53 mi2.42 mi9979+1171843+361843+369580(Top 36%)1818(Top 16%)1818(Top 151%)
30K18.64 mi3.11 mi9847+1321822+211822+219371(Top 35%)1872(Top 16%)1872(Top 155%)
20M20.00 mi1.36 mi9774+731818+41818+49566(Top 36%)2042(Top 18%)2042(Top 169%)
21M21.00 mi1.00 mi9752+221830-121830-129870(Top 37%)2316(Top 20%)2316(Top 192%)
35K21.75 mi0.75 mi9707+451827+31827+38780(Top 33%)1813(Top 16%)1813(Top 150%)
23M23.00 mi1.25 mi9623+841830-31830-38883(Top 33%)1965(Top 17%)1965(Top 163%)
24M24.00 mi1.00 mi9569+541827+31827+38880(Top 33%)2042(Top 18%)2042(Top 169%)
40K24.85 mi0.85 mi9504+65182718278928(Top 34%)2144(Top 19%)2144(Top 178%)
25.2M25.20 mi0.35 mi9499+51837-101837-1010483(Top 39%)2909(Top 25%)2909(Top 241%)
Finish26.22 mi1.02 mi9537-381883-461883-4610808(Top 41%)3082(Top 27%)3082(Top 255%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21stories
+97ft-345ft

Overall

10271

Females

1969

F50-54

1969

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

10371

Females

1987

F50-54

1987

10K→15K

6.2 - 9.3 mi

Top 39%
×3stories
+67ft-78ft

Overall

10271

Females

1969

F50-54

1969

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

9864

Females

1855

F50-54

1855

20K→Half

12.4 - 13.1 mi

Top 38%
×2stories
+19ft-37ft

Overall

10085

Females

1921

F50-54

1921

Half→25K

13.1 - 15.5 mi

Top 36%
×4stories
+66ft-88ft

Overall

9580

Females

1818

F50-54

1818

25K→30K

15.5 - 18.6 mi

Top 35%
×9stories
+181ft-148ft

Overall

9371

Females

1872

F50-54

1872

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

9566

Females

2042

F50-54

2042

20M→21M

20.0 - 21.0 mi

Top 37%
×8stories
+106ft-24ft

Overall

9870

Females

2316

F50-54

2316

21M→35K

21.0 - 21.8 mi

Top 33%
×7stories
+17ft-86ft

Overall

8780

Females

1813

F50-54

1813

35K→23M

21.8 - 23.0 mi

Top 33%
×5stories
+23ft-63ft

Overall

8883

Females

1965

F50-54

1965

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

8880

Females

2042

F50-54

2042

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

8928

Females

2144

F50-54

2144

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

10483

Females

2909

F50-54

2909

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2stories
+22ft-21ft

Overall

10808

Females

3082

F50-54

3082

Passing Analysis

Category:
Athletes Passed
1784*
Passed By
1164
Net Change
+620
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10157
5K → 10K266*368-102#10157#10259
10K → 15K187163+24#10259#10235
15K → 20K218*95+123#10235#10112
20K → Half45*29+16#10112#10096
Half → 25K182*65+117#10096#9979
25K → 30K222*90+132#9979#9847
30K → 20M11946+73#9847#9774
20M → 21M8563+22#9774#9752
21M → 35K6217+45#9752#9707
35K → 23M13854+84#9707#9623
23M → 24M8430+54#9623#9569
24M → 40K90*25+65#9569#9504
40K → 25.2M3126+5#9504#9499
25.2M → Finish5593-38#9499#9537
TOTALS1784*1164+620

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

📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing