Boston Marathon logo
BOSTON MARATHON 2025

Kay Nickerson

Bib: 29408•F

GA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:34
Rank: #21867
Start → 5K
27:34 | 8:52/mi
10K· 6.21 mi
53:43
Rank: #20638 (+1229)
5K → 10K
26:09 | 8:25/mi
15K· 9.32 mi
1:19:56
Rank: #20111 (+527)
10K → 15K
26:13 | 8:26/mi
20K· 12.43 mi
1:47:00
Rank: #19923 (+188)
15K → 20K
27:04 | 8:43/mi
Half· 13.11 mi
1:52:54
Rank: #19922 (+1)
20K → Half
5:54 | 8:39/mi
25K· 15.53 mi
2:14:12
Rank: #19733 (+189)
Half → 25K
21:18 | 8:47/mi
30K· 18.64 mi
2:43:02
Rank: #19571 (+162)
25K → 30K
28:50 | 9:17/mi
20M
2:55:59
Rank: #19559 (+12)
30K → 20M
12:57 | 9:32/mi
21M
3:05:52
Rank: #19440 (+119)
20M → 21M
9:53 | 9:53/mi
35K· 21.75 mi
3:12:47
Rank: #19441 (-1)
21M → 35K
6:55 | 9:15/mi
23M
3:24:46
Rank: #19429 (+12)
35K → 23M
11:59 | 9:34/mi
24M
3:34:00
Rank: #19382 (+47)
23M → 24M
9:14 | 9:14/mi
40K· 24.85 mi
3:42:08
Rank: #19353 (+29)
24M → 40K
8:08 | 9:31/mi
25.2M
3:45:36
Rank: #19310 (+43)
40K → 25.2M
3:28 | 10:03/mi
Finish· 26.22 mi
3:54:31
Rank: #19250 (+60)
25.2M → Finish
8:55 | 8:45/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
Time1:52:54
Pace8:37 /mi
2nd Half
Distance13.11 mi
Time2:01:37
Pace9:17 /mi
📊Positive Split: 7.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:45:4827:348:5227:34
8:52
-
10K
6.21 mi12:11:5753:438:3926:09
8:25
-0:27
15K
9.32 mi12:38:101:19:568:3526:13
8:26
+0:01
20K
12.43 mi13:05:141:47:008:3727:04
8:43
+0:17
Half
13.11 mi13:11:081:52:548:375:54
8:39
-0:04
25K
15.53 mi13:32:262:14:128:3821:18
8:47
+0:08
30K
18.64 mi14:01:162:43:028:4528:50
9:17
+0:30
20M
20.00 mi14:14:132:55:598:4812:57
9:32
+0:15
21M
21.00 mi14:24:063:05:528:519:53
9:53
+0:21
35K
21.75 mi14:31:013:12:478:526:55
9:15
-0:38
23M
23.00 mi14:43:003:24:468:5411:59
9:34
+0:19
24M
24.00 mi14:52:143:34:008:559:14
9:14
-0:20
40K
24.85 mi15:00:223:42:088:568:08
9:31
+0:17
25.2M
25.20 mi15:03:503:45:368:573:28
10:03
+0:32
Finish
26.22 mi15:12:453:54:318:578:55
8:45
-1:18

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

8:25 /mi

Average Pace

8:57 /mi

Slowest Pace

10:03 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:39:16

68% of race

Time at Steady Pace

1:11:47

31% of race

Time at Slower Pace

3:28

1% of race

Average Pace: 8:57 /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 mi11:45:4827:348:5227:34
8:52
#21867
10K
6.21 mi12:11:5753:438:3926:09
8:25
#20638
15K
9.32 mi12:38:101:19:568:3526:13
8:26
#20111
20K
12.43 mi13:05:141:47:008:3727:04
8:43
#19923
Half
13.11 mi13:11:081:52:548:375:54
8:39
#19922
25K
15.53 mi13:32:262:14:128:3821:18
8:47
#19733
30K
18.64 mi14:01:162:43:028:4528:50
9:17
#19571
20M
20.00 mi14:14:132:55:598:4812:57
9:32
#19559
21M
21.00 mi14:24:063:05:528:519:53
9:53
#19440
35K
21.75 mi14:31:013:12:478:526:55
9:15
#19441
23M
23.00 mi14:43:003:24:468:5411:59
9:34
#19429
24M
24.00 mi14:52:143:34:008:559:14
9:14
#19382
40K
24.85 mi15:00:223:42:088:568:08
9:31
#19353
25.2M
25.20 mi15:03:503:45:368:573:28
10:03
#19310
Finish
26.22 mi15:12:453:54:318:578:55
8:45
#19250
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi218678548854818971(Top 67%)6887(Top 56%)6887(Top 126%)
10K6.21 mi3.10 mi20638+12297854+6947854+69419309(Top 68%)7059(Top 58%)7059(Top 129%)
15K9.32 mi3.11 mi20111+5277534+3207534+32018971(Top 67%)6887(Top 56%)6887(Top 126%)
20K12.43 mi3.11 mi19923+1887429+1057429+10519472(Top 69%)7187(Top 59%)7187(Top 131%)
Half13.11 mi0.68 mi19922+17432-37432-320082(Top 71%)7522(Top 62%)7522(Top 138%)
25K15.53 mi2.42 mi19733+1897331+1017331+10118860(Top 66%)6901(Top 56%)6901(Top 126%)
30K18.64 mi3.11 mi19571+1627279+527279+5219031(Top 67%)7138(Top 58%)7138(Top 131%)
20M20.00 mi1.36 mi19559+127295-167295-1619322(Top 68%)7433(Top 61%)7433(Top 136%)
21M21.00 mi1.00 mi19440+1197256+397256+3917861(Top 63%)6721(Top 55%)6721(Top 123%)
35K21.75 mi0.75 mi19441-17269-137269-1319371(Top 68%)7646(Top 63%)7646(Top 140%)
23M23.00 mi1.25 mi19429+127301-327301-3218985(Top 67%)7508(Top 61%)7508(Top 137%)
24M24.00 mi1.00 mi19382+477300+17300+118523(Top 65%)7307(Top 60%)7307(Top 134%)
40K24.85 mi0.85 mi19353+297296+47296+418778(Top 66%)7516(Top 61%)7516(Top 137%)
25.2M25.20 mi0.35 mi19310+437283+137283+1317321(Top 61%)6771(Top 55%)6771(Top 124%)
Finish26.22 mi1.02 mi19250+607273+107273+1017811(Top 63%)6994(Top 57%)6994(Top 128%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21stories
+97ft-345ft

Overall

18971

Females

6887

F18-39

6887

5K→10K

3.1 - 6.2 mi

Top 68%
×5stories
+79ft-138ft

Overall

19309

Females

7059

F18-39

7059

10K→15K

6.2 - 9.3 mi

Top 67%
×3stories
+67ft-78ft

Overall

18971

Females

6887

F18-39

6887

15K→20K

9.3 - 12.4 mi

Top 69%
×5stories
+106ft-86ft

Overall

19472

Females

7187

F18-39

7187

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20082

Females

7522

F18-39

7522

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

18860

Females

6901

F18-39

6901

25K→30K

15.5 - 18.6 mi

Top 67%
×9stories
+181ft-148ft

Overall

19031

Females

7138

F18-39

7138

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

19322

Females

7433

F18-39

7433

20M→21M

20.0 - 21.0 mi

Top 63%
×8stories
+106ft-24ft

Overall

17861

Females

6721

F18-39

6721

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

19371

Females

7646

F18-39

7646

35K→23M

21.8 - 23.0 mi

Top 67%
×5stories
+23ft-63ft

Overall

18985

Females

7508

F18-39

7508

23M→24M

23.0 - 24.0 mi

Top 65%
×6stories
+12ft-82ft

Overall

18523

Females

7307

F18-39

7307

24M→40K

24.0 - 24.9 mi

Top 66%
×1story
+6ft-20ft

Overall

18778

Females

7516

F18-39

7516

40K→25.2M

24.9 - 25.2 mi

Top 61%
×1story
+13ft-16ft

Overall

17321

Females

6771

F18-39

6771

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

17811

Females

6994

F18-39

6994

Passing Analysis

Category:
Athletes Passed
3381
Passed By
764
Net Change
+2617
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21867
5K → 10K124516+1229#21867#20638
10K → 15K55629+527#20638#20111
15K → 20K28294+188#20111#19923
20K → Half3130+1#19923#19922
Half → 25K25162+189#19922#19733
25K → 30K292130+162#19733#19571
30K → 20M115103+12#19571#19559
20M → 21M14930+119#19559#19440
21M → 35K5758-1#19440#19441
35K → 23M10088+12#19441#19429
23M → 24M8841+47#19429#19382
24M → 40K7142+29#19382#19353
40K → 25.2M5310+43#19353#19310
25.2M → Finish9131+60#19310#19250
TOTALS3381764+2617
📊

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