Boston Marathon logo
BOSTON MARATHON 2023

Nicole Harris

Bib: 14592•F

CO

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 35%
Gender (Female)
#0 / 11423
Top 16%
Division (F18-39)
#0 / 4884
Top 28%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:53
Rank: #11340
Start → 5K
23:53 | 7:41/mi
10K· 6.21 mi
48:11
Rank: #12312 (-972)
5K → 10K
24:18 | 7:49/mi
15K· 9.32 mi
1:12:32
Rank: #12511 (-199)
10K → 15K
24:21 | 7:50/mi
20K· 12.43 mi
1:37:02
Rank: #12466 (+45)
15K → 20K
24:30 | 7:53/mi
Half· 13.11 mi
1:42:15
Rank: #12401 (+65)
20K → Half
5:13 | 7:39/mi
25K· 15.53 mi
2:01:01
Rank: #12098 (+303)
Half → 25K
18:46 | 7:44/mi
30K· 18.64 mi
2:25:16
Rank: #11542 (+556)
25K → 30K
24:15 | 7:48/mi
20M
2:35:36
Rank: #11190 (+352)
30K → 20M
10:20 | 7:36/mi
21M
2:43:28
Rank: #10880 (+310)
20M → 21M
7:52 | 7:52/mi
35K· 21.75 mi
2:48:52
Rank: #10694 (+186)
21M → 35K
5:24 | 7:13/mi
23M
2:58:01
Rank: #10324 (+370)
35K → 23M
9:09 | 7:18/mi
24M
3:04:59
Rank: #10008 (+316)
23M → 24M
6:58 | 6:58/mi
40K· 24.85 mi
3:11:02
Rank: #9719 (+289)
24M → 40K
6:03 | 7:05/mi
25.2M
3:13:35
Rank: #9571 (+148)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
3:20:20
Rank: #9290 (+281)
25.2M → Finish
6:45 | 6:37/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
Time1:42:15
Pace7:48 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:38:05
Pace7:29 /mi
📊Negative Split: 4.1% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:0723:537:4123:53
7:41
-
10K
6.21 mi11:17:2548:117:4524:18
7:49
+0:08
15K
9.32 mi11:41:461:12:327:4724:21
7:50
+0:01
20K
12.43 mi12:06:161:37:027:4824:30
7:53
+0:03
Half
13.11 mi12:11:291:42:157:485:13
7:39
-0:14
25K
15.53 mi12:30:152:01:017:4718:46
7:44
+0:05
30K
18.64 mi12:54:302:25:167:4824:15
7:48
+0:04
20M
20.00 mi13:04:502:35:367:4710:20
7:36
-0:12
21M
21.00 mi13:12:422:43:287:477:52
7:52
+0:16
35K
21.75 mi13:18:062:48:527:465:24
7:13
-0:39
23M
23.00 mi13:27:152:58:017:449:09
7:18
+0:05
24M
24.00 mi13:34:133:04:597:426:58
6:58
-0:20
40K
24.85 mi13:40:163:11:027:416:03
7:05
+0:07
25.2M
25.20 mi13:42:493:13:357:412:33
7:24
+0:19
Finish
26.22 mi13:49:343:20:207:396:45
6:37
-0:47

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

6:37 /mi

Average Pace

7:39 /mi

Slowest Pace

7:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:10

13% of race

Time at Steady Pace

1:34:09

47% of race

Time at Slower Pace

1:21:01

40% of race

Average Pace: 7:38 /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 mi10:53:0723:537:4123:53
7:41
#11340
10K
6.21 mi11:17:2548:117:4524:18
7:49
#12312
15K
9.32 mi11:41:461:12:327:4724:21
7:50
#12511
20K
12.43 mi12:06:161:37:027:4824:30
7:53
#12466
Half
13.11 mi12:11:291:42:157:485:13
7:39
#12401
25K
15.53 mi12:30:152:01:017:4718:46
7:44
#12098
30K
18.64 mi12:54:302:25:167:4824:15
7:48
#11542
20M
20.00 mi13:04:502:35:367:4710:20
7:36
#11190
21M
21.00 mi13:12:422:43:287:477:52
7:52
#10880
35K
21.75 mi13:18:062:48:527:465:24
7:13
#10694
23M
23.00 mi13:27:152:58:017:449:09
7:18
#10324
24M
24.00 mi13:34:133:04:597:426:58
6:58
#10008
40K
24.85 mi13:40:163:11:027:416:03
7:05
#9719
25.2M
25.20 mi13:42:493:13:357:412:33
7:24
#9571
Finish
26.22 mi13:49:343:20:207:396:45
6:37
#9290
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi113402505250513031(Top 49%)3490(Top 31%)3490(Top 71%)
10K6.21 mi3.10 mi12312-9723042-5373042-53713322(Top 50%)3614(Top 32%)3614(Top 74%)
15K9.32 mi3.11 mi12511-1993180-1383180-13813031(Top 49%)3490(Top 31%)3490(Top 71%)
20K12.43 mi3.11 mi12466+453179+13179+112496(Top 47%)3250(Top 28%)3250(Top 67%)
Half13.11 mi0.68 mi12401+653148+313148+3111416(Top 43%)2557(Top 22%)2557(Top 52%)
25K15.53 mi2.42 mi12098+3032994+1542994+15410617(Top 40%)2287(Top 20%)2287(Top 47%)
30K18.64 mi3.11 mi11542+5562712+2822712+2829410(Top 35%)1892(Top 17%)1892(Top 39%)
20M20.00 mi1.36 mi11190+3522540+1722540+1727557(Top 28%)1245(Top 11%)1245(Top 25%)
21M21.00 mi1.00 mi10880+3102402+1382402+1386590(Top 25%)987(Top 9%)987(Top 20%)
35K21.75 mi0.75 mi10694+1862321+812321+816698(Top 25%)1000(Top 9%)1000(Top 20%)
23M23.00 mi1.25 mi10324+3702160+1612160+1615384(Top 20%)641(Top 6%)641(Top 13%)
24M24.00 mi1.00 mi10008+3162039+1212039+1214549(Top 17%)460(Top 4%)460(Top 9%)
40K24.85 mi0.85 mi9719+2891920+1191920+1194291(Top 16%)482(Top 4%)482(Top 10%)
25.2M25.20 mi0.35 mi9571+1481872+481872+483499(Top 13%)362(Top 3%)362(Top 7%)
Finish26.22 mi1.02 mi9290+2811773+991773+993150(Top 12%)318(Top 3%)318(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21stories
+97ft-345ft

Overall

13031

Females

3490

F18-39

3490

5K→10K

3.1 - 6.2 mi

Top 50%
×5stories
+79ft-138ft

Overall

13322

Females

3614

F18-39

3614

10K→15K

6.2 - 9.3 mi

Top 49%
×3stories
+67ft-78ft

Overall

13031

Females

3490

F18-39

3490

15K→20K

9.3 - 12.4 mi

Top 47%
×5stories
+106ft-86ft

Overall

12496

Females

3250

F18-39

3250

20K→Half

12.4 - 13.1 mi

Top 43%
×2stories
+19ft-37ft

Overall

11416

Females

2557

F18-39

2557

Half→25K

13.1 - 15.5 mi

Top 40%
×4stories
+66ft-88ft

Overall

10617

Females

2287

F18-39

2287

25K→30K

15.5 - 18.6 mi

Top 35%
×9stories
+181ft-148ft

Overall

9410

Females

1892

F18-39

1892

30K→20M

18.6 - 20.0 mi

Top 28%
×5stories
+64ft-50ft

Overall

7557

Females

1245

F18-39

1245

20M→21M

20.0 - 21.0 mi

Top 25%
×8stories
+106ft-24ft

Overall

6590

Females

987

F18-39

987

21M→35K

21.0 - 21.8 mi

Top 25%
×7stories
+17ft-86ft

Overall

6698

Females

1000

F18-39

1000

35K→23M

21.8 - 23.0 mi

Top 20%
×5stories
+23ft-63ft

Overall

5384

Females

641

F18-39

641

23M→24M

23.0 - 24.0 mi

Top 17%
×6stories
+12ft-82ft

Overall

4549

Females

460

F18-39

460

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4291

Females

482

F18-39

482

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3499

Females

362

F18-39

362

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3150

Females

318

F18-39

318

Passing Analysis

Category:
Athletes Passed
3610*
Passed By
1560
Net Change
+2050
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11340
5K → 10K651037-972#11340#12312
10K → 15K131330-199#12312#12511
15K → 20K200155+45#12511#12466
20K → Half749+65#12466#12401
Half → 25K31916+303#12401#12098
25K → 30K5659+556#12098#11542
30K → 20M3520+352#11542#11190
20M → 21M3122+310#11190#10880
21M → 35K1871+186#10880#10694
35K → 23M3700+370#10694#10324
23M → 24M3160+316#10324#10008
24M → 40K290*1+289#10008#9719
40K → 25.2M1480+148#9719#9571
25.2M → Finish2810+281#9571#9290
TOTALS3610*1560+2050

* 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