Boston Marathon logo
BOSTON MARATHON 2023

Jennifer Mcbrien

Bib: 12571•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 37%
Gender (Female)
#0 / 11423
Top 17%
Division (F18-39)
#0 / 4884
Top 31%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:04
Rank: #14473
Start → 5K
25:04 | 8:04/mi
10K· 6.21 mi
49:00
Rank: #13471 (+1002)
5K → 10K
23:56 | 7:42/mi
15K· 9.32 mi
1:12:53
Rank: #12868 (+603)
10K → 15K
23:53 | 7:41/mi
20K· 12.43 mi
1:37:02
Rank: #12467 (+401)
15K → 20K
24:09 | 7:46/mi
Half· 13.11 mi
1:42:13
Rank: #12378 (+89)
20K → Half
5:11 | 7:36/mi
25K· 15.53 mi
2:01:02
Rank: #12109 (+269)
Half → 25K
18:49 | 7:46/mi
30K· 18.64 mi
2:25:10
Rank: #11501 (+608)
25K → 30K
24:08 | 7:46/mi
20M
2:35:44
Rank: #11243 (+258)
30K → 20M
10:34 | 7:47/mi
21M
2:43:47
Rank: #10994 (+249)
20M → 21M
8:03 | 8:03/mi
35K· 21.75 mi
2:49:16
Rank: #10841 (+153)
21M → 35K
5:29 | 7:20/mi
23M
2:58:38
Rank: #10541 (+300)
35K → 23M
9:22 | 7:29/mi
24M
3:05:54
Rank: #10310 (+231)
23M → 24M
7:16 | 7:16/mi
40K· 24.85 mi
3:12:01
Rank: #10041 (+269)
24M → 40K
6:07 | 7:09/mi
25.2M
3:14:42
Rank: #9934 (+107)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
3:22:02
Rank: #9739 (+195)
25.2M → Finish
7:20 | 7:12/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 Half
Distance13.11 mi
Time1:42:13
Pace7:48 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:39:49
Pace7:37 /mi
📊Negative Split: 2.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4925:048:0425:04
8:04
-
10K
6.21 mi11:16:4549:007:5323:56
7:42
-0:22
15K
9.32 mi11:40:381:12:537:4923:53
7:41
-0:01
20K
12.43 mi12:04:471:37:027:4824:09
7:46
+0:05
Half
13.11 mi12:09:581:42:137:485:11
7:36
-0:10
25K
15.53 mi12:28:472:01:027:4718:49
7:46
+0:10
30K
18.64 mi12:52:552:25:107:4724:08
7:46
0:00
20M
20.00 mi13:03:292:35:447:4710:34
7:47
+0:01
21M
21.00 mi13:11:322:43:477:488:03
8:03
+0:16
35K
21.75 mi13:17:012:49:167:475:29
7:20
-0:43
23M
23.00 mi13:26:232:58:387:469:22
7:29
+0:09
24M
24.00 mi13:33:393:05:547:457:16
7:16
-0:13
40K
24.85 mi13:39:463:12:017:446:07
7:09
-0:07
25.2M
25.20 mi13:42:273:14:427:442:41
7:47
+0:38
Finish
26.22 mi13:49:473:22:027:437:20
7:12
-0:35

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

7:09 /mi

Average Pace

7:43 /mi

Slowest Pace

8:04 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:55

84% of race

Time at Steady Pace

33:07

16% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:42 /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 mi10:52:4925:048:0425:04
8:04
#14473
10K
6.21 mi11:16:4549:007:5323:56
7:42
#13471
15K
9.32 mi11:40:381:12:537:4923:53
7:41
#12868
20K
12.43 mi12:04:471:37:027:4824:09
7:46
#12467
Half
13.11 mi12:09:581:42:137:485:11
7:36
#12378
25K
15.53 mi12:28:472:01:027:4718:49
7:46
#12109
30K
18.64 mi12:52:552:25:107:4724:08
7:46
#11501
20M
20.00 mi13:03:292:35:447:4710:34
7:47
#11243
21M
21.00 mi13:11:322:43:477:488:03
8:03
#10994
35K
21.75 mi13:17:012:49:167:475:29
7:20
#10841
23M
23.00 mi13:26:232:58:387:469:22
7:29
#10541
24M
24.00 mi13:33:393:05:547:457:16
7:16
#10310
40K
24.85 mi13:39:463:12:017:446:07
7:09
#10041
25.2M
25.20 mi13:42:273:14:427:442:41
7:47
#9934
Finish
26.22 mi13:49:473:22:027:437:20
7:12
#9739
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi144734305430511756(Top 44%)2759(Top 24%)2759(Top 56%)
10K6.21 mi3.10 mi13471+10023714+5913714+59112270(Top 46%)3018(Top 26%)3018(Top 62%)
15K9.32 mi3.11 mi12868+6033378+3363378+33611756(Top 44%)2759(Top 24%)2759(Top 56%)
20K12.43 mi3.11 mi12467+4013180+1983180+19811508(Top 43%)2683(Top 23%)2683(Top 55%)
Half13.11 mi0.68 mi12378+893136+443136+4411024(Top 41%)2366(Top 21%)2366(Top 48%)
25K15.53 mi2.42 mi12109+2693000+1363000+13610796(Top 41%)2381(Top 21%)2381(Top 49%)
30K18.64 mi3.11 mi11501+6082688+3122688+3129122(Top 34%)1760(Top 15%)1760(Top 36%)
20M20.00 mi1.36 mi11243+2582565+1232565+1238716(Top 33%)1681(Top 15%)1681(Top 34%)
21M21.00 mi1.00 mi10994+2492457+1082457+1087717(Top 29%)1402(Top 12%)1402(Top 29%)
35K21.75 mi0.75 mi10841+1532395+622395+627395(Top 28%)1270(Top 11%)1270(Top 26%)
23M23.00 mi1.25 mi10541+3002269+1262269+1266344(Top 24%)940(Top 8%)940(Top 19%)
24M24.00 mi1.00 mi10310+2312178+912178+916203(Top 23%)995(Top 9%)995(Top 20%)
40K24.85 mi0.85 mi10041+2692078+1002078+1004688(Top 18%)570(Top 5%)570(Top 12%)
25.2M25.20 mi0.35 mi9934+1072048+302048+305394(Top 20%)886(Top 8%)886(Top 18%)
Finish26.22 mi1.02 mi9739+1951980+681980+686445(Top 24%)1223(Top 11%)1223(Top 25%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21stories
+97ft-345ft

Overall

11756

Females

2759

F18-39

2759

5K→10K

3.1 - 6.2 mi

Top 46%
×5stories
+79ft-138ft

Overall

12270

Females

3018

F18-39

3018

10K→15K

6.2 - 9.3 mi

Top 44%
×3stories
+67ft-78ft

Overall

11756

Females

2759

F18-39

2759

15K→20K

9.3 - 12.4 mi

Top 43%
×5stories
+106ft-86ft

Overall

11508

Females

2683

F18-39

2683

20K→Half

12.4 - 13.1 mi

Top 41%
×2stories
+19ft-37ft

Overall

11024

Females

2366

F18-39

2366

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

10796

Females

2381

F18-39

2381

25K→30K

15.5 - 18.6 mi

Top 34%
×9stories
+181ft-148ft

Overall

9122

Females

1760

F18-39

1760

30K→20M

18.6 - 20.0 mi

Top 33%
×5stories
+64ft-50ft

Overall

8716

Females

1681

F18-39

1681

20M→21M

20.0 - 21.0 mi

Top 29%
×8stories
+106ft-24ft

Overall

7717

Females

1402

F18-39

1402

21M→35K

21.0 - 21.8 mi

Top 28%
×7stories
+17ft-86ft

Overall

7395

Females

1270

F18-39

1270

35K→23M

21.8 - 23.0 mi

Top 24%
×5stories
+23ft-63ft

Overall

6344

Females

940

F18-39

940

23M→24M

23.0 - 24.0 mi

Top 23%
×6stories
+12ft-82ft

Overall

6203

Females

995

F18-39

995

24M→40K

24.0 - 24.9 mi

Top 18%
×1story
+6ft-20ft

Overall

4688

Females

570

F18-39

570

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5394

Females

886

F18-39

886

25.2M→Finish

25.2 - 26.2 mi

Top 24%
×2stories
+22ft-21ft

Overall

6445

Females

1223

F18-39

1223

Passing Analysis

Category:
Athletes Passed
4905*
Passed By
171
Net Change
+4734
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14473
5K → 10K105351+1002#14473#13471
10K → 15K63633+603#13471#12868
15K → 20K43534+401#12868#12467
20K → Half945+89#12467#12378
Half → 25K29021+269#12378#12109
25K → 30K6102+608#12109#11501
30K → 20M2635+258#11501#11243
20M → 21M2512+249#11243#10994
21M → 35K1563+153#10994#10841
35K → 23M3011+300#10841#10541
23M → 24M2354+231#10541#10310
24M → 40K2701+269#10310#10041
40K → 25.2M107*0+107#10041#9934
25.2M → Finish204*9+195#9934#9739
TOTALS4905*171+4734

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

📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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