Boston Marathon logo
BOSTON MARATHON 2023

Denise Koorevaar

Bib: 30372•F

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
36:03
Rank: #26273
Start → 5K
36:03 | 11:36/mi
10K· 6.21 mi
1:17:25
Rank: #26508 (-235)
5K → 10K
41:22 | 13:19/mi
15K· 9.32 mi
1:54:59
Rank: #26435 (+73)
10K → 15K
37:34 | 12:05/mi
20K· 12.43 mi
2:36:58
Rank: #26455 (-20)
15K → 20K
41:59 | 13:31/mi
Half· 13.11 mi
2:45:47
Rank: #26454 (+1)
20K → Half
8:49 | 12:55/mi
25K· 15.53 mi
3:19:56
Rank: #26458 (-4)
Half → 25K
34:09 | 14:05/mi
30K· 18.64 mi
4:06:36
Rank: #26485 (-27)
25K → 30K
46:40 | 15:01/mi
20M
4:26:06
Rank: #26477 (+8)
30K → 20M
19:30 | 14:21/mi
21M
4:41:29
Rank: #26471 (+6)
20M → 21M
15:23 | 15:23/mi
35K· 21.75 mi
4:51:58
Rank: #26473 (-2)
21M → 35K
10:29 | 14:01/mi
23M
5:11:12
Rank: #26484 (-11)
35K → 23M
19:14 | 15:22/mi
24M
5:24:41
Rank: #26466 (+18)
23M → 24M
13:29 | 13:29/mi
40K· 24.85 mi
5:36:00
Rank: #26441 (+25)
24M → 40K
11:19 | 13:14/mi
25.2M
5:40:45
Rank: #26429 (+12)
40K → 25.2M
4:45 | 13:46/mi
Finish· 26.22 mi
5:53:26
Rank: #26412 (+17)
25.2M → Finish
12:41 | 12:27/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
Time2:45:47
Pace12:39 /mi
2nd Half
Distance13.11 mi
Time3:07:39
Pace14:19 /mi
📊Positive Split: 13.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:55:0036:0311:3636:03
11:36
-
10K
6.21 mi12:36:221:17:2512:2841:22
13:19
+1:43
15K
9.32 mi13:13:561:54:5912:2037:34
12:05
-1:14
20K
12.43 mi13:55:552:36:5812:3841:59
13:31
+1:26
Half
13.11 mi14:04:442:45:4712:398:49
12:55
-0:36
25K
15.53 mi14:38:533:19:5612:5234:09
14:05
+1:10
30K
18.64 mi15:25:334:06:3613:1446:40
15:01
+0:56
20M
20.00 mi15:45:034:26:0613:1819:30
14:21
-0:40
21M
21.00 mi16:00:264:41:2913:2415:23
15:23
+1:02
35K
21.75 mi16:10:554:51:5813:2510:29
14:01
-1:22
23M
23.00 mi16:30:095:11:1213:3219:14
15:22
+1:21
24M
24.00 mi16:43:385:24:4113:3213:29
13:29
-1:53
40K
24.85 mi16:54:575:36:0013:3111:19
13:14
-0:15
25.2M
25.20 mi16:59:425:40:4513:314:45
13:46
+0:32
Finish
26.22 mi17:12:235:53:2613:2912:41
12:27
-1:19

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

11:36 /mi

Average Pace

13:29 /mi

Slowest Pace

15:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:35:07

27% of race

Time at Steady Pace

2:03:23

35% of race

Time at Slower Pace

2:14:56

38% of race

Average Pace: 13:29 /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 mi11:55:0036:0311:3636:03
11:36
#26273
10K
6.21 mi12:36:221:17:2512:2841:22
13:19
#26508
15K
9.32 mi13:13:561:54:5912:2037:34
12:05
#26435
20K
12.43 mi13:55:552:36:5812:3841:59
13:31
#26455
Half
13.11 mi14:04:442:45:4712:398:49
12:55
#26454
25K
15.53 mi14:38:533:19:5612:5234:09
14:05
#26458
30K
18.64 mi15:25:334:06:3613:1446:40
15:01
#26485
20M
20.00 mi15:45:034:26:0613:1819:30
14:21
#26477
21M
21.00 mi16:00:264:41:2913:2415:23
15:23
#26471
35K
21.75 mi16:10:554:51:5813:2510:29
14:01
#26473
23M
23.00 mi16:30:095:11:1213:3219:14
15:22
#26484
24M
24.00 mi16:43:385:24:4113:3213:29
13:29
#26466
40K
24.85 mi16:54:575:36:0013:3111:19
13:14
#26441
25.2M
25.20 mi16:59:425:40:4513:314:45
13:46
#26429
Finish
26.22 mi17:12:235:53:2613:2912:41
12:27
#26412
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi26273112121121226118(Top 98%)11115(Top 97%)11115(Top 228%)
10K6.21 mi3.10 mi26508-23511368-15611368-15626588(Top 100%)11410(Top 100%)11410(Top 234%)
15K9.32 mi3.11 mi26435+7311319+4911319+4926118(Top 98%)11115(Top 97%)11115(Top 228%)
20K12.43 mi3.11 mi26455-2011329-1011329-1026421(Top 99%)11310(Top 99%)11310(Top 232%)
Half13.11 mi0.68 mi26454+1113291132926333(Top 99%)11259(Top 99%)11259(Top 231%)
25K15.53 mi2.42 mi26458-411332-311332-326372(Top 99%)11286(Top 99%)11286(Top 231%)
30K18.64 mi3.11 mi26485-2711347-1511347-1526426(Top 99%)11328(Top 99%)11328(Top 232%)
20M20.00 mi1.36 mi26477+811342+511342+526023(Top 98%)11138(Top 98%)11138(Top 228%)
21M21.00 mi1.00 mi26471+611336+611336+625953(Top 97%)11085(Top 97%)11085(Top 227%)
35K21.75 mi0.75 mi26473-211338-211338-226138(Top 98%)11198(Top 98%)11198(Top 229%)
23M23.00 mi1.25 mi26484-1111348-1011348-1026376(Top 99%)11318(Top 99%)11318(Top 232%)
24M24.00 mi1.00 mi26466+1811336+1211336+1225795(Top 97%)11071(Top 97%)11071(Top 227%)
40K24.85 mi0.85 mi26441+2511322+1411322+1425141(Top 94%)10749(Top 94%)10749(Top 220%)
25.2M25.20 mi0.35 mi26429+1211316+611316+624831(Top 93%)10611(Top 93%)10611(Top 217%)
Finish26.22 mi1.02 mi26412+1711310+611310+625649(Top 96%)11005(Top 96%)11005(Top 225%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 98%
×21stories
+97ft-345ft

Overall

26118

Females

11115

F18-39

11115

5K→10K

3.1 - 6.2 mi

Top 100%
×5stories
+79ft-138ft

Overall

26588

Females

11410

F18-39

11410

10K→15K

6.2 - 9.3 mi

Top 98%
×3stories
+67ft-78ft

Overall

26118

Females

11115

F18-39

11115

15K→20K

9.3 - 12.4 mi

Top 99%
×5stories
+106ft-86ft

Overall

26421

Females

11310

F18-39

11310

20K→Half

12.4 - 13.1 mi

Top 99%
×2stories
+19ft-37ft

Overall

26333

Females

11259

F18-39

11259

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

26372

Females

11286

F18-39

11286

25K→30K

15.5 - 18.6 mi

Top 99%
×9stories
+181ft-148ft

Overall

26426

Females

11328

F18-39

11328

30K→20M

18.6 - 20.0 mi

Top 98%
×5stories
+64ft-50ft

Overall

26023

Females

11138

F18-39

11138

20M→21M

20.0 - 21.0 mi

Top 97%
×8stories
+106ft-24ft

Overall

25953

Females

11085

F18-39

11085

21M→35K

21.0 - 21.8 mi

Top 98%
×7stories
+17ft-86ft

Overall

26138

Females

11198

F18-39

11198

35K→23M

21.8 - 23.0 mi

Top 99%
×5stories
+23ft-63ft

Overall

26376

Females

11318

F18-39

11318

23M→24M

23.0 - 24.0 mi

Top 97%
×6stories
+12ft-82ft

Overall

25795

Females

11071

F18-39

11071

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

25141

Females

10749

F18-39

10749

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

24831

Females

10611

F18-39

10611

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2stories
+22ft-21ft

Overall

25649

Females

11005

F18-39

11005

Passing Analysis

Category:
Athletes Passed
252
Passed By
391
Net Change
-139
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26273
5K → 10K2237-235#26273#26508
10K → 15K785+73#26508#26435
15K → 20K2646-20#26435#26455
20K → Half54+1#26455#26454
Half → 25K1519-4#26454#26458
25K → 30K1037-27#26458#26485
30K → 20M157+8#26485#26477
20M → 21M115+6#26477#26471
21M → 35K68-2#26471#26473
35K → 23M617-11#26473#26484
23M → 24M191+18#26484#26466
24M → 40K272+25#26466#26441
40K → 25.2M120+12#26441#26429
25.2M → Finish203+17#26429#26412
TOTALS252391-139
📊

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