Boston Marathon logo
BOSTON MARATHON 2023

Margaret Jasurek-Parker

Bib: 31391•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:02
Rank: #18919
Start → 5K
27:02 | 8:42/mi
10K· 6.21 mi
57:09
Rank: #21388 (-2469)
5K → 10K
30:07 | 9:42/mi
15K· 9.32 mi
1:25:57
Rank: #21436 (-48)
10K → 15K
28:48 | 9:16/mi
20K· 12.43 mi
1:56:17
Rank: #21694 (-258)
15K → 20K
30:20 | 9:46/mi
Half· 13.11 mi
2:02:43
Rank: #21708 (-14)
20K → Half
6:26 | 9:26/mi
25K· 15.53 mi
2:27:39
Rank: #21910 (-202)
Half → 25K
24:56 | 10:17/mi
30K· 18.64 mi
3:02:04
Rank: #22273 (-363)
25K → 30K
34:25 | 11:05/mi
20M
3:19:47
Rank: #22612 (-339)
30K → 20M
17:43 | 13:02/mi
21M
3:33:28
Rank: #22797 (-185)
20M → 21M
13:41 | 13:41/mi
35K· 21.75 mi
3:44:06
Rank: #23069 (-272)
21M → 35K
10:38 | 14:13/mi
23M
3:59:40
Rank: #23189 (-120)
35K → 23M
15:34 | 12:26/mi
24M
4:12:55
Rank: #23373 (-184)
23M → 24M
13:15 | 13:15/mi
40K· 24.85 mi
4:24:05
Rank: #23475 (-102)
24M → 40K
11:10 | 13:04/mi
25.2M
4:28:43
Rank: #23505 (-30)
40K → 25.2M
4:38 | 13:26/mi
Finish· 26.22 mi
4:40:24
Rank: #23567 (-62)
25.2M → Finish
11:41 | 11:28/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
Time2:02:43
Pace9:22 /mi
2nd Half
Distance13.11 mi
Time2:37:41
Pace12:02 /mi
📊Positive Split: 28.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:3027:028:4227:02
8:42
-
10K
6.21 mi12:17:3757:099:1230:07
9:42
+1:00
15K
9.32 mi12:46:251:25:579:1328:48
9:16
-0:26
20K
12.43 mi13:16:451:56:179:2130:20
9:46
+0:30
Half
13.11 mi13:23:112:02:439:226:26
9:26
-0:20
25K
15.53 mi13:48:072:27:399:3024:56
10:17
+0:51
30K
18.64 mi14:22:323:02:049:4634:25
11:05
+0:48
20M
20.00 mi14:40:153:19:479:5917:43
13:02
+1:57
21M
21.00 mi14:53:563:33:2810:1013:41
13:41
+0:39
35K
21.75 mi15:04:343:44:0610:1810:38
14:13
+0:32
23M
23.00 mi15:20:083:59:4010:2515:34
12:26
-1:47
24M
24.00 mi15:33:234:12:5510:3213:15
13:15
+0:49
40K
24.85 mi15:44:334:24:0510:3811:10
13:04
-0:11
25.2M
25.20 mi15:49:114:28:4310:404:38
13:26
+0:22
Finish
26.22 mi16:00:524:40:2410:4211:41
11:28
-1:58

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

8:42 /mi

Average Pace

10:42 /mi

Slowest Pace

14:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:27:39

53% of race

Time at Steady Pace

46:06

16% of race

Time at Slower Pace

1:26:39

31% of race

Average Pace: 10:42 /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 mi11:47:3027:028:4227:02
8:42
#18919
10K
6.21 mi12:17:3757:099:1230:07
9:42
#21388
15K
9.32 mi12:46:251:25:579:1328:48
9:16
#21436
20K
12.43 mi13:16:451:56:179:2130:20
9:46
#21694
Half
13.11 mi13:23:112:02:439:226:26
9:26
#21708
25K
15.53 mi13:48:072:27:399:3024:56
10:17
#21910
30K
18.64 mi14:22:323:02:049:4634:25
11:05
#22273
20M
20.00 mi14:40:153:19:479:5917:43
13:02
#22612
21M
21.00 mi14:53:563:33:2810:1013:41
13:41
#22797
35K
21.75 mi15:04:343:44:0610:1810:38
14:13
#23069
23M
23.00 mi15:20:083:59:4010:2515:34
12:26
#23189
24M
24.00 mi15:33:234:12:5510:3213:15
13:15
#23373
40K
24.85 mi15:44:334:24:0510:3811:10
13:04
#23475
25.2M
25.20 mi15:49:114:28:4310:404:38
13:26
#23505
Finish
26.22 mi16:00:524:40:2410:4211:41
11:28
#23567
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi189197156715621554(Top 81%)8533(Top 75%)8533(Top 175%)
10K6.21 mi3.10 mi21388-24698525-13698525-136923044(Top 87%)9356(Top 82%)9356(Top 192%)
15K9.32 mi3.11 mi21436-488518+78518+721554(Top 81%)8533(Top 75%)8533(Top 175%)
20K12.43 mi3.11 mi21694-2588658-1408658-14022324(Top 84%)8979(Top 79%)8979(Top 184%)
Half13.11 mi0.68 mi21708-148665-78665-721949(Top 82%)8764(Top 77%)8764(Top 179%)
25K15.53 mi2.42 mi21910-2028775-1108775-11022812(Top 86%)9280(Top 81%)9280(Top 190%)
30K18.64 mi3.11 mi22273-3638990-2158990-21523211(Top 87%)9575(Top 84%)9575(Top 196%)
20M20.00 mi1.36 mi22612-3399201-2119201-21125213(Top 95%)10707(Top 94%)10707(Top 219%)
21M21.00 mi1.00 mi22797-1859302-1019302-10124757(Top 93%)10480(Top 92%)10480(Top 215%)
35K21.75 mi0.75 mi23069-2729452-1509452-15026197(Top 98%)11226(Top 98%)11226(Top 230%)
23M23.00 mi1.25 mi23189-1209515-639515-6324515(Top 92%)10395(Top 91%)10395(Top 213%)
24M24.00 mi1.00 mi23373-1849624-1099624-10925644(Top 96%)10998(Top 96%)10998(Top 225%)
40K24.85 mi0.85 mi23475-1029683-599683-5924987(Top 94%)10669(Top 93%)10669(Top 218%)
25.2M25.20 mi0.35 mi23505-309705-229705-2224466(Top 92%)10415(Top 91%)10415(Top 213%)
Finish26.22 mi1.02 mi23567-629746-419746-4124640(Top 93%)10475(Top 92%)10475(Top 214%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21stories
+97ft-345ft

Overall

21554

Females

8533

F18-39

8533

5K→10K

3.1 - 6.2 mi

Top 87%
×5stories
+79ft-138ft

Overall

23044

Females

9356

F18-39

9356

10K→15K

6.2 - 9.3 mi

Top 81%
×3stories
+67ft-78ft

Overall

21554

Females

8533

F18-39

8533

15K→20K

9.3 - 12.4 mi

Top 84%
×5stories
+106ft-86ft

Overall

22324

Females

8979

F18-39

8979

20K→Half

12.4 - 13.1 mi

Top 82%
×2stories
+19ft-37ft

Overall

21949

Females

8764

F18-39

8764

Half→25K

13.1 - 15.5 mi

Top 86%
×4stories
+66ft-88ft

Overall

22812

Females

9280

F18-39

9280

25K→30K

15.5 - 18.6 mi

Top 87%
×9stories
+181ft-148ft

Overall

23211

Females

9575

F18-39

9575

30K→20M

18.6 - 20.0 mi

Top 95%
×5stories
+64ft-50ft

Overall

25213

Females

10707

F18-39

10707

20M→21M

20.0 - 21.0 mi

Top 93%
×8stories
+106ft-24ft

Overall

24757

Females

10480

F18-39

10480

21M→35K

21.0 - 21.8 mi

Top 98%
×7stories
+17ft-86ft

Overall

26197

Females

11226

F18-39

11226

35K→23M

21.8 - 23.0 mi

Top 92%
×5stories
+23ft-63ft

Overall

24515

Females

10395

F18-39

10395

23M→24M

23.0 - 24.0 mi

Top 96%
×6stories
+12ft-82ft

Overall

25644

Females

10998

F18-39

10998

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

24987

Females

10669

F18-39

10669

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

24466

Females

10415

F18-39

10415

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2stories
+22ft-21ft

Overall

24640

Females

10475

F18-39

10475

Passing Analysis

Category:
Athletes Passed
394
Passed By
5042
Net Change
-4648
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18919
5K → 10K52474-2469#18919#21388
10K → 15K139187-48#21388#21436
15K → 20K48306-258#21436#21694
20K → Half1933-14#21694#21708
Half → 25K50252-202#21708#21910
25K → 30K47410-363#21910#22273
30K → 20M9348-339#22273#22612
20M → 21M7192-185#22612#22797
21M → 35K5277-272#22797#23069
35K → 23M21141-120#23069#23189
23M → 24M3187-184#23189#23373
24M → 40K15117-102#23373#23475
40K → 25.2M737-30#23475#23505
25.2M → Finish1981-62#23505#23567
TOTALS3945042-4648
📊

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