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BOSTON MARATHON 2025

Laura Nash

Bib: 27929•F

MA

0:00
0:00
/ mi
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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
27:30
Rank: #21767
Start → 5K
27:30 | 8:51/mi
10K· 6.21 mi
53:56
Rank: #20807 (+960)
5K → 10K
26:26 | 8:30/mi
15K· 9.32 mi
1:20:04
Rank: #20179 (+628)
10K → 15K
26:08 | 8:25/mi
20K· 12.43 mi
1:46:17
Rank: #19602 (+577)
15K → 20K
26:13 | 8:26/mi
Half· 13.11 mi
1:51:55
Rank: #19501 (+101)
20K → Half
5:38 | 8:15/mi
25K· 15.53 mi
2:13:16
Rank: #19392 (+109)
Half → 25K
21:21 | 8:48/mi
30K· 18.64 mi
2:42:05
Rank: #19305 (+87)
25K → 30K
28:49 | 9:17/mi
20M
2:55:02
Rank: #19299 (+6)
30K → 20M
12:57 | 9:32/mi
21M
3:05:19
Rank: #19309 (-10)
20M → 21M
10:17 | 10:17/mi
35K· 21.75 mi
3:12:17
Rank: #19321 (-12)
21M → 35K
6:58 | 9:19/mi
23M
3:23:54
Rank: #19220 (+101)
35K → 23M
11:37 | 9:17/mi
24M
3:33:19
Rank: #19242 (-22)
23M → 24M
9:25 | 9:25/mi
40K· 24.85 mi
3:41:22
Rank: #19196 (+46)
24M → 40K
8:03 | 9:25/mi
25.2M
3:44:46
Rank: #19134 (+62)
40K → 25.2M
3:24 | 9:52/mi
Finish· 26.22 mi
3:53:41
Rank: #19075 (+59)
25.2M → Finish
8:55 | 8:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:55
Pace8:32 /mi
2nd Half
Distance13.11 mi
Time2:01:46
Pace9:17 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:3427:308:5127:30
8:51
-
10K
6.21 mi12:11:0053:568:4126:26
8:30
-0:21
15K
9.32 mi12:37:081:20:048:3526:08
8:25
-0:05
20K
12.43 mi13:03:211:46:178:3326:13
8:26
+0:01
Half
13.11 mi13:08:591:51:558:325:38
8:15
-0:11
25K
15.53 mi13:30:202:13:168:3521:21
8:48
+0:33
30K
18.64 mi13:59:092:42:058:4228:49
9:17
+0:29
20M
20.00 mi14:12:062:55:028:4512:57
9:32
+0:15
21M
21.00 mi14:22:233:05:198:4910:17
10:17
+0:45
35K
21.75 mi14:29:213:12:178:506:58
9:19
-0:58
23M
23.00 mi14:40:583:23:548:5211:37
9:17
-0:02
24M
24.00 mi14:50:233:33:198:539:25
9:25
+0:08
40K
24.85 mi14:58:263:41:228:548:03
9:25
0:00
25.2M
25.20 mi15:01:503:44:468:553:24
9:52
+0:27
Finish
26.22 mi15:10:453:53:418:558:55
8:45
-1:07

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

8:15 /mi

Average Pace

8:55 /mi

Slowest Pace

10:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:22:11

61% of race

Time at Steady Pace

1:17:49

33% of race

Time at Slower Pace

13:41

6% of race

Average Pace: 8:55 /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 mi11:44:3427:308:5127:30
8:51
#21767
10K
6.21 mi12:11:0053:568:4126:26
8:30
#20807
15K
9.32 mi12:37:081:20:048:3526:08
8:25
#20179
20K
12.43 mi13:03:211:46:178:3326:13
8:26
#19602
Half
13.11 mi13:08:591:51:558:325:38
8:15
#19501
25K
15.53 mi13:30:202:13:168:3521:21
8:48
#19392
30K
18.64 mi13:59:092:42:058:4228:49
9:17
#19305
20M
20.00 mi14:12:062:55:028:4512:57
9:32
#19299
21M
21.00 mi14:22:233:05:198:4910:17
10:17
#19309
35K
21.75 mi14:29:213:12:178:506:58
9:19
#19321
23M
23.00 mi14:40:583:23:548:5211:37
9:17
#19220
24M
24.00 mi14:50:233:33:198:539:25
9:25
#19242
40K
24.85 mi14:58:263:41:228:548:03
9:25
#19196
25.2M
25.20 mi15:01:503:44:468:553:24
9:52
#19134
Finish
26.22 mi15:10:453:53:418:558:55
8:45
#19075
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi217678495849518789(Top 66%)6779(Top 55%)6779(Top 124%)
10K6.21 mi3.10 mi20807+9607943+5527943+55219861(Top 70%)7394(Top 60%)7394(Top 135%)
15K9.32 mi3.11 mi20179+6287574+3697574+36918789(Top 66%)6779(Top 55%)6779(Top 124%)
20K12.43 mi3.11 mi19602+5777245+3297245+32917811(Top 63%)6235(Top 51%)6235(Top 114%)
Half13.11 mi0.68 mi19501+1017193+527193+5217741(Top 62%)6195(Top 51%)6195(Top 113%)
25K15.53 mi2.42 mi19392+1097141+527141+5218976(Top 67%)6967(Top 57%)6967(Top 127%)
30K18.64 mi3.11 mi19305+877132+97132+918999(Top 67%)7121(Top 58%)7121(Top 130%)
20M20.00 mi1.36 mi19299+67154-227154-2219321(Top 68%)7432(Top 61%)7432(Top 136%)
21M21.00 mi1.00 mi19309-107182-287182-2819316(Top 68%)7503(Top 61%)7503(Top 137%)
35K21.75 mi0.75 mi19321-127198-167198-1619638(Top 69%)7786(Top 64%)7786(Top 142%)
23M23.00 mi1.25 mi19220+1017173+257173+2517704(Top 62%)6846(Top 56%)6846(Top 125%)
24M24.00 mi1.00 mi19242-227209-367209-3619318(Top 68%)7715(Top 63%)7715(Top 141%)
40K24.85 mi0.85 mi19196+467206+37206+318366(Top 65%)7315(Top 60%)7315(Top 134%)
25.2M25.20 mi0.35 mi19134+627183+237183+2316463(Top 58%)6324(Top 52%)6324(Top 116%)
Finish26.22 mi1.02 mi19075+597171+127171+1217808(Top 63%)6991(Top 57%)6991(Top 128%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21stories
+97ft-345ft

Overall

18789

Females

6779

F18-39

6779

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

19861

Females

7394

F18-39

7394

10K→15K

6.2 - 9.3 mi

Top 66%
×3stories
+67ft-78ft

Overall

18789

Females

6779

F18-39

6779

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

17811

Females

6235

F18-39

6235

20K→Half

12.4 - 13.1 mi

Top 62%
×2stories
+19ft-37ft

Overall

17741

Females

6195

F18-39

6195

Half→25K

13.1 - 15.5 mi

Top 67%
×4stories
+66ft-88ft

Overall

18976

Females

6967

F18-39

6967

25K→30K

15.5 - 18.6 mi

Top 67%
×9stories
+181ft-148ft

Overall

18999

Females

7121

F18-39

7121

30K→20M

18.6 - 20.0 mi

Top 68%
×5stories
+64ft-50ft

Overall

19321

Females

7432

F18-39

7432

20M→21M

20.0 - 21.0 mi

Top 68%
×8stories
+106ft-24ft

Overall

19316

Females

7503

F18-39

7503

21M→35K

21.0 - 21.8 mi

Top 69%
×7stories
+17ft-86ft

Overall

19638

Females

7786

F18-39

7786

35K→23M

21.8 - 23.0 mi

Top 62%
×5stories
+23ft-63ft

Overall

17704

Females

6846

F18-39

6846

23M→24M

23.0 - 24.0 mi

Top 68%
×6stories
+12ft-82ft

Overall

19318

Females

7715

F18-39

7715

24M→40K

24.0 - 24.9 mi

Top 65%
×1story
+6ft-20ft

Overall

18366

Females

7315

F18-39

7315

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16463

Females

6324

F18-39

6324

25.2M→Finish

25.2 - 26.2 mi

Top 63%
×2stories
+22ft-21ft

Overall

17808

Females

6991

F18-39

6991

Passing Analysis

Category:
Athletes Passed
3500
Passed By
808
Net Change
+2692
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21767
5K → 10K99434+960#21767#20807
10K → 15K65022+628#20807#20179
15K → 20K5858+577#20179#19602
20K → Half1098+101#19602#19501
Half → 25K217108+109#19501#19392
25K → 30K252165+87#19392#19305
30K → 20M108102+6#19305#19299
20M → 21M93103-10#19299#19309
21M → 35K4658-12#19309#19321
35K → 23M14544+101#19321#19220
23M → 24M6385-22#19220#19242
24M → 40K8741+46#19242#19196
40K → 25.2M675+62#19196#19134
25.2M → Finish8425+59#19134#19075
TOTALS3500808+2692
📊

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