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BOSTON MARATHON 2025

Sarah Nelson

Bib: 15331•F

IL

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 40%
Gender (Female)
#0 / 12228
Top 24%
Division (F18-39)
#0 / 5469
Top 41%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:41
Rank: #7677
Start → 5K
21:41 | 6:59/mi
10K· 6.21 mi
44:14
Rank: #8785 (-1108)
5K → 10K
22:33 | 7:15/mi
15K· 9.32 mi
1:07:22
Rank: #9566 (-781)
10K → 15K
23:08 | 7:27/mi
20K· 12.43 mi
1:30:56
Rank: #10024 (-458)
15K → 20K
23:34 | 7:35/mi
Half· 13.11 mi
1:36:04
Rank: #10122 (-98)
20K → Half
5:08 | 7:31/mi
25K· 15.53 mi
1:54:53
Rank: #10416 (-294)
Half → 25K
18:49 | 7:46/mi
30K· 18.64 mi
2:20:33
Rank: #10954 (-538)
25K → 30K
25:40 | 8:16/mi
20M
2:31:57
Rank: #11068 (-114)
30K → 20M
11:24 | 8:23/mi
21M
2:41:10
Rank: #11273 (-205)
20M → 21M
9:13 | 9:13/mi
35K· 21.75 mi
2:47:02
Rank: #11246 (+27)
21M → 35K
5:52 | 7:51/mi
23M
2:57:28
Rank: #11276 (-30)
35K → 23M
10:26 | 8:20/mi
24M
3:05:29
Rank: #11234 (+42)
23M → 24M
8:01 | 8:01/mi
40K· 24.85 mi
3:12:53
Rank: #11353 (-119)
24M → 40K
7:24 | 8:39/mi
25.2M
3:16:05
Rank: #11372 (-19)
40K → 25.2M
3:12 | 9:17/mi
Finish· 26.22 mi
3:24:11
Rank: #11404 (-32)
25.2M → Finish
8:06 | 7:57/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:04
Pace7:20 /mi
2nd Half
Distance13.11 mi
Time1:48:07
Pace8:15 /mi
📊Positive Split: 12.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:5621:416:5921:41
6:59
-
10K
6.21 mi11:16:2944:147:0722:33
7:15
+0:16
15K
9.32 mi11:39:371:07:227:1423:08
7:27
+0:12
20K
12.43 mi12:03:111:30:567:1923:34
7:35
+0:08
Half
13.11 mi12:08:191:36:047:205:08
7:31
-0:04
25K
15.53 mi12:27:081:54:537:2418:49
7:46
+0:15
30K
18.64 mi12:52:482:20:337:3225:40
8:16
+0:30
20M
20.00 mi13:04:122:31:577:3611:24
8:23
+0:07
21M
21.00 mi13:13:252:41:107:409:13
9:13
+0:50
35K
21.75 mi13:19:172:47:027:415:52
7:51
-1:22
23M
23.00 mi13:29:432:57:287:4310:26
8:20
+0:29
24M
24.00 mi13:37:443:05:297:448:01
8:01
-0:19
40K
24.85 mi13:45:083:12:537:467:24
8:39
+0:38
25.2M
25.20 mi13:48:203:16:057:473:12
9:17
+0:38
Finish
26.22 mi13:56:263:24:117:488:06
7:57
-1:20

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

6:59 /mi

Average Pace

7:48 /mi

Slowest Pace

9:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:04

47% of race

Time at Steady Pace

1:06:28

33% of race

Time at Slower Pace

41:39

20% of race

Average Pace: 7:47 /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 mi10:53:5621:416:5921:41
6:59
#7677
10K
6.21 mi11:16:2944:147:0722:33
7:15
#8785
15K
9.32 mi11:39:371:07:227:1423:08
7:27
#9566
20K
12.43 mi12:03:111:30:567:1923:34
7:35
#10024
Half
13.11 mi12:08:191:36:047:205:08
7:31
#10122
25K
15.53 mi12:27:081:54:537:2418:49
7:46
#10416
30K
18.64 mi12:52:482:20:337:3225:40
8:16
#10954
20M
20.00 mi13:04:122:31:577:3611:24
8:23
#11068
21M
21.00 mi13:13:252:41:107:409:13
9:13
#11273
35K
21.75 mi13:19:172:47:027:415:52
7:51
#11246
23M
23.00 mi13:29:432:57:287:4310:26
8:20
#11276
24M
24.00 mi13:37:443:05:297:448:01
8:01
#11234
40K
24.85 mi13:45:083:12:537:467:24
8:39
#11353
25.2M
25.20 mi13:48:203:16:057:473:12
9:17
#11372
Finish
26.22 mi13:56:263:24:117:488:06
7:57
#11404
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi767788188111311(Top 40%)2538(Top 21%)2538(Top 46%)
10K6.21 mi3.10 mi8785-11081293-4121293-41210001(Top 35%)1833(Top 15%)1833(Top 34%)
15K9.32 mi3.11 mi9566-7811633-3401633-34011311(Top 40%)2538(Top 21%)2538(Top 46%)
20K12.43 mi3.11 mi10024-4581881-2481881-24811486(Top 40%)2735(Top 22%)2735(Top 50%)
Half13.11 mi0.68 mi10122-981926-451926-4511986(Top 42%)2936(Top 24%)2936(Top 54%)
25K15.53 mi2.42 mi10416-2942092-1662092-16612045(Top 42%)3139(Top 26%)3139(Top 57%)
30K18.64 mi3.11 mi10954-5382447-3552447-35513242(Top 47%)3963(Top 32%)3963(Top 72%)
20M20.00 mi1.36 mi11068-1142537-902537-9013084(Top 46%)4019(Top 33%)4019(Top 73%)
21M21.00 mi1.00 mi11273-2052696-1592696-15914710(Top 52%)4997(Top 41%)4997(Top 91%)
35K21.75 mi0.75 mi11246+272705-92705-911161(Top 39%)3187(Top 26%)3187(Top 58%)
23M23.00 mi1.25 mi11276-302762-572762-5712242(Top 43%)3867(Top 32%)3867(Top 71%)
24M24.00 mi1.00 mi11234+422781-192781-1911378(Top 40%)3501(Top 29%)3501(Top 64%)
40K24.85 mi0.85 mi11353-1192879-982879-9814374(Top 51%)5166(Top 42%)5166(Top 94%)
25.2M25.20 mi0.35 mi11372-192909-302909-3013364(Top 47%)4673(Top 38%)4673(Top 85%)
Finish26.22 mi1.02 mi11404-322957-482957-4812550(Top 44%)4207(Top 34%)4207(Top 77%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11311

Females

2538

F18-39

2538

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

10001

Females

1833

F18-39

1833

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11311

Females

2538

F18-39

2538

15K→20K

9.3 - 12.4 mi

Top 40%
×5stories
+106ft-86ft

Overall

11486

Females

2735

F18-39

2735

20K→Half

12.4 - 13.1 mi

Top 42%
×2stories
+19ft-37ft

Overall

11986

Females

2936

F18-39

2936

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

12045

Females

3139

F18-39

3139

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

13242

Females

3963

F18-39

3963

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

13084

Females

4019

F18-39

4019

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

14710

Females

4997

F18-39

4997

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

11161

Females

3187

F18-39

3187

35K→23M

21.8 - 23.0 mi

Top 43%
×5stories
+23ft-63ft

Overall

12242

Females

3867

F18-39

3867

23M→24M

23.0 - 24.0 mi

Top 40%
×6stories
+12ft-82ft

Overall

11378

Females

3501

F18-39

3501

24M→40K

24.0 - 24.9 mi

Top 51%
×1story
+6ft-20ft

Overall

14374

Females

5166

F18-39

5166

40K→25.2M

24.9 - 25.2 mi

Top 47%
×1story
+13ft-16ft

Overall

13364

Females

4673

F18-39

4673

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2stories
+22ft-21ft

Overall

12550

Females

4207

F18-39

4207

Passing Analysis

Category:
Athletes Passed
884
Passed By
4608
Net Change
-3727
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7677
5K → 10K131121-1108#7677#8785
10K → 15K32813-781#8785#9566
15K → 20K84540-458#9566#10024
20K → Half11109-98#10024#10122
Half → 25K90384-294#10122#10416
25K → 30K105642-538#10416#10954
30K → 20M89203-114#10954#11068
20M → 21M47252-205#11068#11273
21M → 35K6942+27#11273#11246
35K → 23M100130-30#11246#11276
23M → 24M10361+42#11276#11234
24M → 40K40159-119#11234#11353
40K → 25.2M3251-19#11353#11372
25.2M → Finish69101-32#11372#11404
TOTALS8844608-3727
📊

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