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BOSTON MARATHON 2025

Kerri Nelson

Bib: 8316•F

NH

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
38:27
Rank: #28315
Start → 5K
38:27 | 12:23/mi
10K· 6.21 mi
1:16:52
Rank: #28256 (+59)
5K → 10K
38:25 | 12:22/mi
15K· 9.32 mi
1:58:58
Rank: #28307 (-51)
10K → 15K
42:06 | 13:33/mi
20K· 12.43 mi
2:42:22
Rank: #28308 (-1)
15K → 20K
43:24 | 13:58/mi
Half· 13.11 mi
2:51:15
Rank: #28303 (+5)
20K → Half
8:53 | 13:01/mi
25K· 15.53 mi
3:26:38
Rank: #28305 (-2)
Half → 25K
35:23 | 14:36/mi
30K· 18.64 mi
4:14:25
Rank: #28297 (+8)
25K → 30K
47:47 | 15:23/mi
20M
4:35:37
Rank: #28306 (-9)
30K → 20M
21:12 | 15:36/mi
21M
4:52:08
Rank: #28312 (-6)
20M → 21M
16:31 | 16:31/mi
35K· 21.75 mi
5:02:44
Rank: #28307 (+5)
21M → 35K
10:36 | 14:10/mi
23M
5:20:57
Rank: #28309 (-2)
35K → 23M
18:13 | 14:33/mi
24M
5:35:17
Rank: #28306 (+3)
23M → 24M
14:20 | 14:20/mi
40K· 24.85 mi
5:47:18
Rank: #28299 (+7)
24M → 40K
12:01 | 14:03/mi
25.2M
5:52:31
Rank: #28294 (+5)
40K → 25.2M
5:13 | 15:08/mi
Finish· 26.22 mi
6:06:39
Rank: #28293 (+1)
25.2M → Finish
14:08 | 13:52/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:51:15
Pace13:04 /mi
2nd Half
Distance13.11 mi
Time3:15:24
Pace14:54 /mi
📊Positive Split: 14.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:3438:2712:2338:27
12:23
-
10K
6.21 mi11:26:591:16:5212:2238:25
12:22
-0:01
15K
9.32 mi12:09:051:58:5812:4642:06
13:33
+1:11
20K
12.43 mi12:52:292:42:2213:0443:24
13:58
+0:25
Half
13.11 mi13:01:222:51:1513:048:53
13:01
-0:57
25K
15.53 mi13:36:453:26:3813:1835:23
14:36
+1:35
30K
18.64 mi14:24:324:14:2513:3947:47
15:23
+0:47
20M
20.00 mi14:45:444:35:3713:4721:12
15:36
+0:13
21M
21.00 mi15:02:154:52:0813:5516:31
16:31
+0:55
35K
21.75 mi15:12:515:02:4413:5510:36
14:10
-2:21
23M
23.00 mi15:31:045:20:5713:5718:13
14:33
+0:23
24M
24.00 mi15:45:245:35:1713:5814:20
14:20
-0:13
40K
24.85 mi15:57:255:47:1813:5812:01
14:03
-0:17
25.2M
25.20 mi16:02:385:52:3113:595:13
15:08
+1:05
Finish
26.22 mi16:16:466:06:3914:0014:08
13:52
-1:16

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

12:22 /mi

Average Pace

14:00 /mi

Slowest Pace

16:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:07:51

35% of race

Time at Steady Pace

2:28:05

40% of race

Time at Slower Pace

1:30:43

25% of race

Average Pace: 13:59 /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 mi10:48:3438:2712:2338:27
12:23
#28315
10K
6.21 mi11:26:591:16:5212:2238:25
12:22
#28256
15K
9.32 mi12:09:051:58:5812:4642:06
13:33
#28307
20K
12.43 mi12:52:292:42:2213:0443:24
13:58
#28308
Half
13.11 mi13:01:222:51:1513:048:53
13:01
#28303
25K
15.53 mi13:36:453:26:3813:1835:23
14:36
#28305
30K
18.64 mi14:24:324:14:2513:3947:47
15:23
#28297
20M
20.00 mi14:45:444:35:3713:4721:12
15:36
#28306
21M
21.00 mi15:02:154:52:0813:5516:31
16:31
#28312
35K
21.75 mi15:12:515:02:4413:5510:36
14:10
#28307
23M
23.00 mi15:31:045:20:5713:5718:13
14:33
#28309
24M
24.00 mi15:45:245:35:1713:5814:20
14:20
#28306
40K
24.85 mi15:57:255:47:1813:5812:01
14:03
#28299
25.2M
25.20 mi16:02:385:52:3113:595:13
15:08
#28294
Finish
26.22 mi16:16:466:06:3914:0014:08
13:52
#28293
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi28315121691216928315(Top 100%)12182(Top 100%)12182(Top 709%)
10K6.21 mi3.10 mi28256+5912134+3512134+3528128(Top 99%)12057(Top 99%)12057(Top 702%)
15K9.32 mi3.11 mi28307-5112170-3612170-3628315(Top 100%)12182(Top 100%)12182(Top 709%)
20K12.43 mi3.11 mi28308-112172-212172-228240(Top 99%)12149(Top 99%)12149(Top 707%)
Half13.11 mi0.68 mi28303+512170+212170+228012(Top 99%)12013(Top 98%)12013(Top 699%)
25K15.53 mi2.42 mi28305-212175-512175-528131(Top 99%)12089(Top 99%)12089(Top 704%)
30K18.64 mi3.11 mi28297+812176-112176-128156(Top 99%)12116(Top 99%)12116(Top 705%)
20M20.00 mi1.36 mi28306-912181-512181-528069(Top 99%)12089(Top 99%)12089(Top 704%)
21M21.00 mi1.00 mi28312-612188-712188-728017(Top 99%)12067(Top 99%)12067(Top 702%)
35K21.75 mi0.75 mi28307+512184+412184+427768(Top 98%)11992(Top 98%)11992(Top 698%)
23M23.00 mi1.25 mi28309-212183+112183+127675(Top 97%)11942(Top 98%)11942(Top 695%)
24M24.00 mi1.00 mi28306+312184-112184-127803(Top 98%)12028(Top 98%)12028(Top 700%)
40K24.85 mi0.85 mi28299+712182+212182+227215(Top 96%)11752(Top 96%)11752(Top 684%)
25.2M25.20 mi0.35 mi28294+512179+312179+327216(Top 96%)11762(Top 96%)11762(Top 685%)
Finish26.22 mi1.02 mi28293+112181-212181-227995(Top 99%)12090(Top 99%)12090(Top 704%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 100%
×21stories
+97ft-345ft

Overall

28315

Females

12182

F40-44

12182

5K→10K

3.1 - 6.2 mi

Top 99%
×5stories
+79ft-138ft

Overall

28128

Females

12057

F40-44

12057

10K→15K

6.2 - 9.3 mi

Top 100%
×3stories
+67ft-78ft

Overall

28315

Females

12182

F40-44

12182

15K→20K

9.3 - 12.4 mi

Top 99%
×5stories
+106ft-86ft

Overall

28240

Females

12149

F40-44

12149

20K→Half

12.4 - 13.1 mi

Top 99%
×2stories
+19ft-37ft

Overall

28012

Females

12013

F40-44

12013

Half→25K

13.1 - 15.5 mi

Top 99%
×4stories
+66ft-88ft

Overall

28131

Females

12089

F40-44

12089

25K→30K

15.5 - 18.6 mi

Top 99%
×9stories
+181ft-148ft

Overall

28156

Females

12116

F40-44

12116

30K→20M

18.6 - 20.0 mi

Top 99%
×5stories
+64ft-50ft

Overall

28069

Females

12089

F40-44

12089

20M→21M

20.0 - 21.0 mi

Top 99%
×8stories
+106ft-24ft

Overall

28017

Females

12067

F40-44

12067

21M→35K

21.0 - 21.8 mi

Top 98%
×7stories
+17ft-86ft

Overall

27768

Females

11992

F40-44

11992

35K→23M

21.8 - 23.0 mi

Top 97%
×5stories
+23ft-63ft

Overall

27675

Females

11942

F40-44

11942

23M→24M

23.0 - 24.0 mi

Top 98%
×6stories
+12ft-82ft

Overall

27803

Females

12028

F40-44

12028

24M→40K

24.0 - 24.9 mi

Top 96%
×1story
+6ft-20ft

Overall

27215

Females

11752

F40-44

11752

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

27216

Females

11762

F40-44

11762

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2stories
+22ft-21ft

Overall

27995

Females

12090

F40-44

12090

Passing Analysis

Category:
Athletes Passed
173
Passed By
151
Net Change
+22
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#28315
5K → 10K645+59#28315#28256
10K → 15K657-51#28256#28307
15K → 20K1718-1#28307#28308
20K → Half50+5#28308#28303
Half → 25K1113-2#28303#28305
25K → 30K1911+8#28305#28297
30K → 20M312-9#28297#28306
20M → 21M39-6#28306#28312
21M → 35K116+5#28312#28307
35K → 23M46-2#28307#28309
23M → 24M85+3#28309#28306
24M → 40K92+7#28306#28299
40K → 25.2M61+5#28299#28294
25.2M → Finish76+1#28294#28293
TOTALS173151+22
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing