Boston Marathon logo
BOSTON MARATHON 2023

Jaclyn Kerr

Bib: 29466•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
32:29
Rank: #24600
Start → 5K
32:29 | 10:27/mi
10K· 6.21 mi
1:04:31
Rank: #24462 (+138)
5K → 10K
32:02 | 10:19/mi
15K· 9.32 mi
1:37:21
Rank: #24533 (-71)
10K → 15K
32:50 | 10:34/mi
20K· 12.43 mi
2:11:48
Rank: #24600 (-67)
15K → 20K
34:27 | 11:05/mi
Half· 13.11 mi
2:19:18
Rank: #24638 (-38)
20K → Half
7:30 | 11:00/mi
25K· 15.53 mi
2:53:39
Rank: #25245 (-607)
Half → 25K
34:21 | 14:10/mi
30K· 18.64 mi
3:37:10
Rank: #25473 (-228)
25K → 30K
43:31 | 14:00/mi
20M
3:56:42
Rank: #25564 (-91)
30K → 20M
19:32 | 14:22/mi
21M
4:11:44
Rank: #25596 (-32)
20M → 21M
15:02 | 15:02/mi
35K· 21.75 mi
4:21:31
Rank: #25598 (-2)
21M → 35K
9:47 | 13:05/mi
23M
4:37:55
Rank: #25582 (+16)
35K → 23M
16:24 | 13:06/mi
24M
4:50:24
Rank: #25572 (+10)
23M → 24M
12:29 | 12:29/mi
40K· 24.85 mi
5:01:51
Rank: #25566 (+6)
24M → 40K
11:27 | 13:24/mi
25.2M
5:06:32
Rank: #25549 (+17)
40K → 25.2M
4:41 | 13:35/mi
Finish· 26.22 mi
5:18:31
Rank: #25538 (+11)
25.2M → Finish
11:59 | 11:46/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
Time2:19:18
Pace10:38 /mi
2nd Half
Distance13.11 mi
Time2:59:13
Pace13:40 /mi
📊Positive Split: 28.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:0632:2910:2732:29
10:27
-
10K
6.21 mi12:25:081:04:3110:2332:02
10:19
-0:08
15K
9.32 mi12:57:581:37:2110:2732:50
10:34
+0:15
20K
12.43 mi13:32:252:11:4810:3634:27
11:05
+0:31
Half
13.11 mi13:39:552:19:1810:387:30
11:00
-0:05
25K
15.53 mi14:14:162:53:3911:1134:21
14:10
+3:10
30K
18.64 mi14:57:473:37:1011:3943:31
14:00
-0:10
20M
20.00 mi15:17:193:56:4211:5019:32
14:22
+0:22
21M
21.00 mi15:32:214:11:4411:5915:02
15:02
+0:40
35K
21.75 mi15:42:084:21:3112:019:47
13:05
-1:57
23M
23.00 mi15:58:324:37:5512:0516:24
13:06
+0:01
24M
24.00 mi16:11:014:50:2412:0612:29
12:29
-0:37
40K
24.85 mi16:22:285:01:5112:0911:27
13:24
+0:55
25.2M
25.20 mi16:27:095:06:3212:104:41
13:35
+0:11
Finish
26.22 mi16:39:085:18:3112:0911:59
11:46
-1:49

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

10:19 /mi

Average Pace

12:09 /mi

Slowest Pace

15:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:31:17

47% of race

Time at Steady Pace

54:48

17% of race

Time at Slower Pace

1:52:26

35% of race

Average Pace: 12:09 /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 mi11:53:0632:2910:2732:29
10:27
#24600
10K
6.21 mi12:25:081:04:3110:2332:02
10:19
#24462
15K
9.32 mi12:57:581:37:2110:2732:50
10:34
#24533
20K
12.43 mi13:32:252:11:4810:3634:27
11:05
#24600
Half
13.11 mi13:39:552:19:1810:387:30
11:00
#24638
25K
15.53 mi14:14:162:53:3911:1134:21
14:10
#25245
30K
18.64 mi14:57:473:37:1011:3943:31
14:00
#25473
20M
20.00 mi15:17:193:56:4211:5019:32
14:22
#25564
21M
21.00 mi15:32:214:11:4411:5915:02
15:02
#25596
35K
21.75 mi15:42:084:21:3112:019:47
13:05
#25598
23M
23.00 mi15:58:324:37:5512:0516:24
13:06
#25582
24M
24.00 mi16:11:014:50:2412:0612:29
12:29
#25572
40K
24.85 mi16:22:285:01:5112:0911:27
13:24
#25566
25.2M
25.20 mi16:27:095:06:3212:104:41
13:35
#25549
Finish
26.22 mi16:39:085:18:3112:0911:59
11:46
#25538
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24600102181021824581(Top 92%)10225(Top 90%)10225(Top 209%)
10K6.21 mi3.10 mi24462+13810140+7810140+7824329(Top 91%)10078(Top 88%)10078(Top 206%)
15K9.32 mi3.11 mi24533-7110180-4010180-4024581(Top 92%)10225(Top 90%)10225(Top 209%)
20K12.43 mi3.11 mi24600-6710234-5410234-5424742(Top 93%)10329(Top 90%)10329(Top 211%)
Half13.11 mi0.68 mi24638-3810259-2510259-2524952(Top 94%)10476(Top 92%)10476(Top 214%)
25K15.53 mi2.42 mi25245-60710611-35210611-35226406(Top 99%)11308(Top 99%)11308(Top 232%)
30K18.64 mi3.11 mi25473-22810760-14910760-14926035(Top 98%)11116(Top 97%)11116(Top 228%)
20M20.00 mi1.36 mi25564-9110813-5310813-5326034(Top 98%)11143(Top 98%)11143(Top 228%)
21M21.00 mi1.00 mi25596-3210831-1810831-1825745(Top 97%)10979(Top 96%)10979(Top 225%)
35K21.75 mi0.75 mi25598-210837-610837-625627(Top 96%)10959(Top 96%)10959(Top 224%)
23M23.00 mi1.25 mi25582+16108371083725197(Top 95%)10742(Top 94%)10742(Top 220%)
24M24.00 mi1.00 mi25572+1010836+110836+125048(Top 94%)10710(Top 94%)10710(Top 219%)
40K24.85 mi0.85 mi25566+6108361083625281(Top 95%)10812(Top 95%)10812(Top 221%)
25.2M25.20 mi0.35 mi25549+1710832+410832+424625(Top 92%)10504(Top 92%)10504(Top 215%)
Finish26.22 mi1.02 mi25538+1110831+110831+125002(Top 94%)10671(Top 93%)10671(Top 218%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21stories
+97ft-345ft

Overall

24581

Females

10225

F18-39

10225

5K→10K

3.1 - 6.2 mi

Top 91%
×5stories
+79ft-138ft

Overall

24329

Females

10078

F18-39

10078

10K→15K

6.2 - 9.3 mi

Top 92%
×3stories
+67ft-78ft

Overall

24581

Females

10225

F18-39

10225

15K→20K

9.3 - 12.4 mi

Top 93%
×5stories
+106ft-86ft

Overall

24742

Females

10329

F18-39

10329

20K→Half

12.4 - 13.1 mi

Top 94%
×2stories
+19ft-37ft

Overall

24952

Females

10476

F18-39

10476

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

26406

Females

11308

F18-39

11308

25K→30K

15.5 - 18.6 mi

Top 98%
×9stories
+181ft-148ft

Overall

26035

Females

11116

F18-39

11116

30K→20M

18.6 - 20.0 mi

Top 98%
×5stories
+64ft-50ft

Overall

26034

Females

11143

F18-39

11143

20M→21M

20.0 - 21.0 mi

Top 97%
×8stories
+106ft-24ft

Overall

25745

Females

10979

F18-39

10979

21M→35K

21.0 - 21.8 mi

Top 96%
×7stories
+17ft-86ft

Overall

25627

Females

10959

F18-39

10959

35K→23M

21.8 - 23.0 mi

Top 95%
×5stories
+23ft-63ft

Overall

25197

Females

10742

F18-39

10742

23M→24M

23.0 - 24.0 mi

Top 94%
×6stories
+12ft-82ft

Overall

25048

Females

10710

F18-39

10710

24M→40K

24.0 - 24.9 mi

Top 95%
×1story
+6ft-20ft

Overall

25281

Females

10812

F18-39

10812

40K→25.2M

24.9 - 25.2 mi

Top 92%
×1story
+13ft-16ft

Overall

24625

Females

10504

F18-39

10504

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2stories
+22ft-21ft

Overall

25002

Females

10671

F18-39

10671

Passing Analysis

Category:
Athletes Passed
628
Passed By
1566
Net Change
-938
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24600
5K → 10K273135+138#24600#24462
10K → 15K101172-71#24462#24533
15K → 20K72139-67#24533#24600
20K → Half947-38#24600#24638
Half → 25K3610-607#24638#25245
25K → 30K23251-228#25245#25473
30K → 20M697-91#25473#25564
20M → 21M1547-32#25564#25596
21M → 35K1820-2#25596#25598
35K → 23M3216+16#25598#25582
23M → 24M2010+10#25582#25572
24M → 40K1812+6#25572#25566
40K → 25.2M170+17#25566#25549
25.2M → Finish2110+11#25549#25538
TOTALS6281566-938
📊

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