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BOSTON MARATHON 2025

Margaret Grossman

Bib: 10093•F

MN

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 29%
Gender (Female)
#0 / 12228
Top 12%
Division (F18-39)
#0 / 5469
Top 22%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:40
Rank: #7636
Start → 5K
21:40 | 6:58/mi
10K· 6.21 mi
43:32
Rank: #7908 (-272)
5K → 10K
21:52 | 7:02/mi
15K· 9.32 mi
1:05:53
Rank: #8260 (-352)
10K → 15K
22:21 | 7:11/mi
20K· 12.43 mi
1:28:13
Rank: #8179 (+81)
15K → 20K
22:21 | 7:11/mi
Half· 13.11 mi
1:33:09
Rank: #8211 (-32)
20K → Half
4:56 | 7:14/mi
25K· 15.53 mi
1:52:15
Rank: #8921 (-710)
Half → 25K
19:06 | 7:53/mi
30K· 18.64 mi
2:15:52
Rank: #8738 (+183)
25K → 30K
23:37 | 7:36/mi
20M
2:26:23
Rank: #8699 (+39)
30K → 20M
10:31 | 7:44/mi
21M
2:34:22
Rank: #8562 (+137)
20M → 21M
7:59 | 7:59/mi
35K· 21.75 mi
2:40:36
Rank: #8785 (-223)
21M → 35K
6:14 | 8:20/mi
23M
2:50:10
Rank: #8631 (+154)
35K → 23M
9:34 | 7:38/mi
24M
2:57:38
Rank: #8538 (+93)
23M → 24M
7:28 | 7:28/mi
40K· 24.85 mi
3:04:07
Rank: #8437 (+101)
24M → 40K
6:29 | 7:35/mi
25.2M
3:06:56
Rank: #8379 (+58)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:14:19
Rank: #8345 (+34)
25.2M → Finish
7:23 | 7:15/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:09
Pace7:06 /mi
2nd Half
Distance13.11 mi
Time1:41:10
Pace7:43 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5921:406:5821:40
6:58
-
10K
6.21 mi11:11:5143:327:0021:52
7:02
+0:04
15K
9.32 mi11:34:121:05:537:0422:21
7:11
+0:09
20K
12.43 mi11:56:321:28:137:0622:21
7:11
0:00
Half
13.11 mi12:01:281:33:097:064:56
7:14
+0:03
25K
15.53 mi12:20:341:52:157:1419:06
7:53
+0:39
30K
18.64 mi12:44:112:15:527:1723:37
7:36
-0:17
20M
20.00 mi12:54:422:26:237:1910:31
7:44
+0:08
21M
21.00 mi13:02:412:34:227:217:59
7:59
+0:15
35K
21.75 mi13:08:552:40:367:236:14
8:20
+0:21
23M
23.00 mi13:18:292:50:107:249:34
7:38
-0:42
24M
24.00 mi13:25:572:57:387:247:28
7:28
-0:10
40K
24.85 mi13:32:263:04:077:246:29
7:35
+0:07
25.2M
25.20 mi13:35:153:06:567:252:49
8:10
+0:35
Finish
26.22 mi13:42:383:14:197:257:23
7:15
-0:55

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

6:58 /mi

Average Pace

7:25 /mi

Slowest Pace

8:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:27:40

76% of race

Time at Steady Pace

40:25

21% of race

Time at Slower Pace

6:14

3% of race

Average Pace: 7:25 /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 mi10:49:5921:406:5821:40
6:58
#7636
10K
6.21 mi11:11:5143:327:0021:52
7:02
#7908
15K
9.32 mi11:34:121:05:537:0422:21
7:11
#8260
20K
12.43 mi11:56:321:28:137:0622:21
7:11
#8179
Half
13.11 mi12:01:281:33:097:064:56
7:14
#8211
25K
15.53 mi12:20:341:52:157:1419:06
7:53
#8921
30K
18.64 mi12:44:112:15:527:1723:37
7:36
#8738
20M
20.00 mi12:54:422:26:237:1910:31
7:44
#8699
21M
21.00 mi13:02:412:34:227:217:59
7:59
#8562
35K
21.75 mi13:08:552:40:367:236:14
8:20
#8785
23M
23.00 mi13:18:292:50:107:249:34
7:38
#8631
24M
24.00 mi13:25:572:57:387:247:28
7:28
#8538
40K
24.85 mi13:32:263:04:077:246:29
7:35
#8437
25.2M
25.20 mi13:35:153:06:567:252:49
8:10
#8379
Finish
26.22 mi13:42:383:14:197:257:23
7:15
#8345
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi76368688689037(Top 32%)1447(Top 12%)1447(Top 26%)
10K6.21 mi3.10 mi7908-272968-100968-1008222(Top 29%)1083(Top 9%)1083(Top 20%)
15K9.32 mi3.11 mi8260-3521103-1351103-1359037(Top 32%)1447(Top 12%)1447(Top 26%)
20K12.43 mi3.11 mi8179+811093+101093+108126(Top 29%)1161(Top 9%)1161(Top 21%)
Half13.11 mi0.68 mi8211-321112-191112-199433(Top 33%)1676(Top 14%)1676(Top 31%)
25K15.53 mi2.42 mi8921-7101410-2981410-29812955(Top 46%)3638(Top 30%)3638(Top 67%)
30K18.64 mi3.11 mi8738+1831391+191391+198468(Top 30%)1582(Top 13%)1582(Top 29%)
20M20.00 mi1.36 mi8699+391420-291420-298641(Top 30%)1804(Top 15%)1804(Top 33%)
21M21.00 mi1.00 mi8562+1371391+291391+297286(Top 26%)1426(Top 12%)1426(Top 26%)
35K21.75 mi0.75 mi8785-2231501-1101501-11014477(Top 51%)4931(Top 40%)4931(Top 90%)
23M23.00 mi1.25 mi8631+1541481+201481+207531(Top 27%)1622(Top 13%)1622(Top 30%)
24M24.00 mi1.00 mi8538+93148114817485(Top 26%)1653(Top 14%)1653(Top 30%)
40K24.85 mi0.85 mi8437+1011477+41477+47335(Top 26%)1687(Top 14%)1687(Top 31%)
25.2M25.20 mi0.35 mi8379+581470+71470+76933(Top 24%)1605(Top 13%)1605(Top 29%)
Finish26.22 mi1.02 mi8345+341488-181488-187389(Top 26%)1809(Top 15%)1809(Top 33%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21stories
+97ft-345ft

Overall

9037

Females

1447

F18-39

1447

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

8222

Females

1083

F18-39

1083

10K→15K

6.2 - 9.3 mi

Top 32%
×3stories
+67ft-78ft

Overall

9037

Females

1447

F18-39

1447

15K→20K

9.3 - 12.4 mi

Top 29%
×5stories
+106ft-86ft

Overall

8126

Females

1161

F18-39

1161

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9433

Females

1676

F18-39

1676

Half→25K

13.1 - 15.5 mi

Top 46%
×4stories
+66ft-88ft

Overall

12955

Females

3638

F18-39

3638

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

8468

Females

1582

F18-39

1582

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

8641

Females

1804

F18-39

1804

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

7286

Females

1426

F18-39

1426

21M→35K

21.0 - 21.8 mi

Top 51%
×7stories
+17ft-86ft

Overall

14477

Females

4931

F18-39

4931

35K→23M

21.8 - 23.0 mi

Top 27%
×5stories
+23ft-63ft

Overall

7531

Females

1622

F18-39

1622

23M→24M

23.0 - 24.0 mi

Top 26%
×6stories
+12ft-82ft

Overall

7485

Females

1653

F18-39

1653

24M→40K

24.0 - 24.9 mi

Top 26%
×1story
+6ft-20ft

Overall

7335

Females

1687

F18-39

1687

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6933

Females

1605

F18-39

1605

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2stories
+22ft-21ft

Overall

7389

Females

1809

F18-39

1809

Passing Analysis

Category:
Athletes Passed
1607
Passed By
2316
Net Change
-709
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7636
5K → 10K109381-272#7636#7908
10K → 15K58410-352#7908#8260
15K → 20K192111+81#8260#8179
20K → Half1446-32#8179#8211
Half → 25K35745-710#8211#8921
25K → 30K305122+183#8921#8738
30K → 20M11475+39#8738#8699
20M → 21M16629+137#8699#8562
21M → 35K16239-223#8562#8785
35K → 23M19036+154#8785#8631
23M → 24M12532+93#8631#8538
24M → 40K12827+101#8538#8437
40K → 25.2M6810+58#8437#8379
25.2M → Finish8753+34#8379#8345
TOTALS16072316-709
📊

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