Boston Marathon logo
BOSTON MARATHON 2023

Soo Ching Mak

Bib: 22930•F

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:05
Rank: #18998
Start → 5K
8:43/mi
27:05 split
10K· 6.21 mi
54:29
Rank: #19505 (-507)
5K → 10K
8:49/mi
27:24 split
15K· 9.32 mi
1:22:20
Rank: #19785 (-280)
10K → 15K
8:58/mi
27:51 split
20K· 12.43 mi
1:50:40
Rank: #19882 (-97)
15K → 20K
9:07/mi
28:20 split
Half· 13.11 mi
1:56:45
Rank: #19876 (+6)
20K → Half
8:55/mi
6:05 split
25K· 15.53 mi
2:18:26
Rank: #19681 (+195)
Half → 25K
8:57/mi
21:41 split
30K· 18.64 mi
2:47:19
Rank: #19477 (+204)
25K → 30K
9:18/mi
28:53 split
20M
2:59:53
Rank: #19337 (+140)
30K → 20M
9:15/mi
12:34 split
21M
3:09:50
Rank: #19227 (+110)
20M → 21M
9:57/mi
9:57 split
35K· 21.75 mi
3:16:19
Rank: #19138 (+89)
21M → 35K
8:40/mi
6:29 split
23M
3:27:43
Rank: #18984 (+154)
35K → 23M
9:06/mi
11:24 split
24M
3:36:23
Rank: #18823 (+161)
23M → 24M
8:40/mi
8:40 split
40K· 24.85 mi
3:43:59
Rank: #18723 (+100)
24M → 40K
8:53/mi
7:36 split
25.2M
3:47:15
Rank: #18666 (+57)
40K → 25.2M
9:28/mi
3:16 split
Finish· 26.22 mi
3:56:08
Rank: #18584 (+82)
25.2M → Finish
8:43/mi
8:53 split

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
Time1:56:45
Pace8:54 /mi
2nd Half
Distance13.11 mi
Time1:59:23
Pace9:06 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4127:058:4327:05
8:43
-
10K
6.21 mi11:53:0554:298:4627:24
8:49
+0:06
15K
9.32 mi12:20:561:22:208:5027:51
8:58
+0:09
20K
12.43 mi12:49:161:50:408:5428:20
9:07
+0:09
Half
13.11 mi12:55:211:56:458:546:05
8:55
-0:12
25K
15.53 mi13:17:022:18:268:5521:41
8:57
+0:02
30K
18.64 mi13:45:552:47:198:5928:53
9:18
+0:21
20M
20.00 mi13:58:292:59:539:0012:34
9:15
-0:03
21M
21.00 mi14:08:263:09:509:029:57
9:57
+0:42
35K
21.75 mi14:14:553:16:199:026:29
8:40
-1:17
23M
23.00 mi14:26:193:27:439:0211:24
9:06
+0:26
24M
24.00 mi14:34:593:36:239:018:40
8:40
-0:26
40K
24.85 mi14:42:353:43:599:017:36
8:53
+0:13
25.2M
25.20 mi14:45:513:47:159:013:16
9:28
+0:35
Finish
26.22 mi14:54:443:56:089:018:53
8:43
-0:45

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

8:40 /mi

Average Pace

9:01 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:46:11

96% of race

Time at Steady Pace

9:57

4% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:00 /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 mi11:25:4127:058:4327:05
8:43
#18998
10K
6.21 mi11:53:0554:298:4627:24
8:49
#19505
15K
9.32 mi12:20:561:22:208:5027:51
8:58
#19785
20K
12.43 mi12:49:161:50:408:5428:20
9:07
#19882
Half
13.11 mi12:55:211:56:458:546:05
8:55
#19876
25K
15.53 mi13:17:022:18:268:5521:41
8:57
#19681
30K
18.64 mi13:45:552:47:198:5928:53
9:18
#19477
20M
20.00 mi13:58:292:59:539:0012:34
9:15
#19337
21M
21.00 mi14:08:263:09:509:029:57
9:57
#19227
35K
21.75 mi14:14:553:16:199:026:29
8:40
#19138
23M
23.00 mi14:26:193:27:439:0211:24
9:06
#18984
24M
24.00 mi14:34:593:36:239:018:40
8:40
#18823
40K
24.85 mi14:42:353:43:599:017:36
8:53
#18723
25.2M
25.20 mi14:45:513:47:159:013:16
9:28
#18666
Finish
26.22 mi14:54:443:56:089:018:53
8:43
#18584
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi189987207720720337(Top 76%)7864(Top 69%)7864(Top 652%)
10K6.21 mi3.10 mi19505-5077466-2597466-25920046(Top 75%)7721(Top 68%)7721(Top 640%)
15K9.32 mi3.11 mi19785-2807612-1467612-14620337(Top 76%)7864(Top 69%)7864(Top 652%)
20K12.43 mi3.11 mi19882-977650-387650-3820225(Top 76%)7794(Top 68%)7794(Top 646%)
Half13.11 mi0.68 mi19876+67650765020066(Top 75%)7693(Top 67%)7693(Top 637%)
25K15.53 mi2.42 mi19681+1957526+1247526+12418689(Top 70%)6958(Top 61%)6958(Top 576%)
30K18.64 mi3.11 mi19477+2047414+1127414+11218624(Top 70%)6987(Top 61%)6987(Top 579%)
20M20.00 mi1.36 mi19337+1407349+657349+6517810(Top 67%)6644(Top 58%)6644(Top 550%)
21M21.00 mi1.00 mi19227+1107299+507299+5017881(Top 67%)6689(Top 59%)6689(Top 554%)
35K21.75 mi0.75 mi19138+897253+467253+4616296(Top 61%)5881(Top 51%)5881(Top 487%)
23M23.00 mi1.25 mi18984+1547172+817172+8116593(Top 62%)6082(Top 53%)6082(Top 504%)
24M24.00 mi1.00 mi18823+1617102+707102+7015507(Top 58%)5547(Top 49%)5547(Top 460%)
40K24.85 mi0.85 mi18723+1007052+507052+5015603(Top 59%)5648(Top 49%)5648(Top 468%)
25.2M25.20 mi0.35 mi18666+577027+257027+2515169(Top 57%)5423(Top 47%)5423(Top 449%)
Finish26.22 mi1.02 mi18584+826985+426985+4216610(Top 62%)6164(Top 54%)6164(Top 511%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21story building
+97ft-345ft

Overall

20337

Females

7864

F50-54

7864

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

20046

Females

7721

F50-54

7721

10K→15K

6.2 - 9.3 mi

Top 76%
×3story building
+67ft-78ft

Overall

20337

Females

7864

F50-54

7864

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

20225

Females

7794

F50-54

7794

20K→Half

12.4 - 13.1 mi

Top 75%
×2story building
+19ft-37ft

Overall

20066

Females

7693

F50-54

7693

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

18689

Females

6958

F50-54

6958

25K→30K

15.5 - 18.6 mi

Top 70%
×9story building
+181ft-148ft

Overall

18624

Females

6987

F50-54

6987

30K→20M

18.6 - 20.0 mi

Top 67%
×5story building
+64ft-50ft

Overall

17810

Females

6644

F50-54

6644

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17881

Females

6689

F50-54

6689

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

16296

Females

5881

F50-54

5881

35K→23M

21.8 - 23.0 mi

Top 62%
×5story building
+23ft-63ft

Overall

16593

Females

6082

F50-54

6082

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

15507

Females

5547

F50-54

5547

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

15603

Females

5648

F50-54

5648

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15169

Females

5423

F50-54

5423

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2story building
+22ft-21ft

Overall

16610

Females

6164

F50-54

6164

Passing Analysis

Category:
Athletes Passed
1897
Passed By
1483
Net Change
+414
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18998
5K → 10K143650-507#18998#19505
10K → 15K90370-280#19505#19785
15K → 20K137234-97#19785#19882
20K → Half3024+6#19882#19876
Half → 25K23136+195#19876#19681
25K → 30K26662+204#19681#19477
30K → 20M15919+140#19477#19337
20M → 21M14030+110#19337#19227
21M → 35K923+89#19227#19138
35K → 23M16915+154#19138#18984
23M → 24M1676+161#18984#18823
24M → 40K11111+100#18823#18723
40K → 25.2M603+57#18723#18666
25.2M → Finish10220+82#18666#18584
TOTALS18971483+414
📊

Passing Visuals

Category:
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