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BOSTON MARATHON 2025

Ellie Swemba-Grimmer

Bib: 19956•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 30%
Gender (Female)
#0 / 12228
Top 13%
Masters (Masters Women)
#0 / 6759
Top 4%
Division (F40-44)
#0 / 1718
Top 10%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:02
Rank: #11470
Start → 5K
23:02 | 7:25/mi
10K· 6.21 mi
45:33
Rank: #10597 (+873)
5K → 10K
22:31 | 7:15/mi
15K· 9.32 mi
1:08:04
Rank: #10229 (+368)
10K → 15K
22:31 | 7:15/mi
20K· 12.43 mi
1:30:39
Rank: #9826 (+403)
15K → 20K
22:35 | 7:16/mi
Half· 13.11 mi
1:35:35
Rank: #9793 (+33)
20K → Half
4:56 | 7:14/mi
25K· 15.53 mi
1:53:15
Rank: #9489 (+304)
Half → 25K
17:40 | 7:17/mi
30K· 18.64 mi
2:16:44
Rank: #9155 (+334)
25K → 30K
23:29 | 7:34/mi
20M
2:27:08
Rank: #9019 (+136)
30K → 20M
10:24 | 7:39/mi
21M
2:35:18
Rank: #8952 (+67)
20M → 21M
8:10 | 8:10/mi
35K· 21.75 mi
2:40:52
Rank: #8880 (+72)
21M → 35K
5:34 | 7:26/mi
23M
2:50:29
Rank: #8755 (+125)
35K → 23M
9:37 | 7:41/mi
24M
2:57:57
Rank: #8656 (+99)
23M → 24M
7:28 | 7:28/mi
40K· 24.85 mi
3:04:32
Rank: #8578 (+78)
24M → 40K
6:35 | 7:42/mi
25.2M
3:07:34
Rank: #8605 (-27)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:15:03
Rank: #8566 (+39)
25.2M → Finish
7:29 | 7:21/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:35
Pace7:17 /mi
2nd Half
Distance13.11 mi
Time1:39:28
Pace7:35 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:0323:027:2523:02
7:25
-
10K
6.21 mi11:37:3445:337:2022:31
7:15
-0:10
15K
9.32 mi12:00:051:08:047:1822:31
7:15
0:00
20K
12.43 mi12:22:401:30:397:1822:35
7:16
+0:01
Half
13.11 mi12:27:361:35:357:174:56
7:14
-0:02
25K
15.53 mi12:45:161:53:157:1717:40
7:17
+0:03
30K
18.64 mi13:08:452:16:447:2023:29
7:34
+0:17
20M
20.00 mi13:19:092:27:087:2110:24
7:39
+0:05
21M
21.00 mi13:27:192:35:187:248:10
8:10
+0:31
35K
21.75 mi13:32:532:40:527:245:34
7:26
-0:44
23M
23.00 mi13:42:302:50:297:259:37
7:41
+0:15
24M
24.00 mi13:49:582:57:577:257:28
7:28
-0:13
40K
24.85 mi13:56:333:04:327:256:35
7:42
+0:14
25.2M
25.20 mi13:59:353:07:347:273:02
8:48
+1:06
Finish
26.22 mi14:07:043:15:037:277:29
7:21
-1:27

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

7:14 /mi

Average Pace

7:27 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:37:15

81% of race

Time at Slower Pace

37:48

19% of race

Average Pace: 7:26 /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 mi11:15:0323:027:2523:02
7:25
#11470
10K
6.21 mi11:37:3445:337:2022:31
7:15
#10597
15K
9.32 mi12:00:051:08:047:1822:31
7:15
#10229
20K
12.43 mi12:22:401:30:397:1822:35
7:16
#9826
Half
13.11 mi12:27:361:35:357:174:56
7:14
#9793
25K
15.53 mi12:45:161:53:157:1717:40
7:17
#9489
30K
18.64 mi13:08:452:16:447:2023:29
7:34
#9155
20M
20.00 mi13:19:092:27:087:2110:24
7:39
#9019
21M
21.00 mi13:27:192:35:187:248:10
8:10
#8952
35K
21.75 mi13:32:532:40:527:245:34
7:26
#8880
23M
23.00 mi13:42:302:50:297:259:37
7:41
#8755
24M
24.00 mi13:49:582:57:577:257:28
7:28
#8656
40K
24.85 mi13:56:333:04:327:256:35
7:42
#8578
25.2M
25.20 mi13:59:353:07:347:273:02
8:48
#8605
Finish
26.22 mi14:07:043:15:037:277:29
7:21
#8566
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi11470251025109540(Top 34%)1668(Top 14%)1668(Top 97%)
10K6.21 mi3.10 mi10597+8732105+4052105+4059913(Top 35%)1792(Top 15%)1792(Top 104%)
15K9.32 mi3.11 mi10229+3681942+1631942+1639540(Top 34%)1668(Top 14%)1668(Top 97%)
20K12.43 mi3.11 mi9826+4031785+1571785+1578802(Top 31%)1437(Top 12%)1437(Top 84%)
Half13.11 mi0.68 mi9793+331772+131772+139440(Top 33%)1683(Top 14%)1683(Top 98%)
25K15.53 mi2.42 mi9489+3041677+951677+958286(Top 29%)1335(Top 11%)1335(Top 78%)
30K18.64 mi3.11 mi9155+3341579+981579+988151(Top 29%)1457(Top 12%)1457(Top 85%)
20M20.00 mi1.36 mi9019+1361546+331546+338071(Top 28%)1565(Top 13%)1565(Top 91%)
21M21.00 mi1.00 mi8952+671552-61552-68398(Top 30%)1894(Top 15%)1894(Top 110%)
35K21.75 mi0.75 mi8880+721545+71545+78249(Top 29%)1777(Top 15%)1777(Top 103%)
23M23.00 mi1.25 mi8755+1251535+101535+107801(Top 27%)1738(Top 14%)1738(Top 101%)
24M24.00 mi1.00 mi8656+991529+61529+67491(Top 26%)1659(Top 14%)1659(Top 97%)
40K24.85 mi0.85 mi8578+781536-71536-78102(Top 29%)2029(Top 17%)2029(Top 118%)
25.2M25.20 mi0.35 mi8605-271564-281564-2810628(Top 37%)3284(Top 27%)3284(Top 191%)
Finish26.22 mi1.02 mi8566+391572-81572-88096(Top 29%)2104(Top 17%)2104(Top 122%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

9540

Females

1668

F40-44

1668

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

9913

Females

1792

F40-44

1792

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

9540

Females

1668

F40-44

1668

15K→20K

9.3 - 12.4 mi

Top 31%
×5stories
+106ft-86ft

Overall

8802

Females

1437

F40-44

1437

20K→Half

12.4 - 13.1 mi

Top 33%
×2stories
+19ft-37ft

Overall

9440

Females

1683

F40-44

1683

Half→25K

13.1 - 15.5 mi

Top 29%
×4stories
+66ft-88ft

Overall

8286

Females

1335

F40-44

1335

25K→30K

15.5 - 18.6 mi

Top 29%
×9stories
+181ft-148ft

Overall

8151

Females

1457

F40-44

1457

30K→20M

18.6 - 20.0 mi

Top 28%
×5stories
+64ft-50ft

Overall

8071

Females

1565

F40-44

1565

20M→21M

20.0 - 21.0 mi

Top 30%
×8stories
+106ft-24ft

Overall

8398

Females

1894

F40-44

1894

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8249

Females

1777

F40-44

1777

35K→23M

21.8 - 23.0 mi

Top 27%
×5stories
+23ft-63ft

Overall

7801

Females

1738

F40-44

1738

23M→24M

23.0 - 24.0 mi

Top 26%
×6stories
+12ft-82ft

Overall

7491

Females

1659

F40-44

1659

24M→40K

24.0 - 24.9 mi

Top 29%
×1story
+6ft-20ft

Overall

8102

Females

2029

F40-44

2029

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10628

Females

3284

F40-44

3284

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

8096

Females

2104

F40-44

2104

Passing Analysis

Category:
Athletes Passed
3459*
Passed By
555
Net Change
+2904
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11470
5K → 10K92148+873#11470#10597
10K → 15K39729+368#10597#10229
15K → 20K428*25+403#10229#9826
20K → Half5320+33#9826#9793
Half → 25K32622+304#9793#9489
25K → 30K39056+334#9489#9155
30K → 20M17337+136#9155#9019
20M → 21M12760+67#9019#8952
21M → 35K10331+72#8952#8880
35K → 23M17550+125#8880#8755
23M → 24M12122+99#8755#8656
24M → 40K12244+78#8656#8578
40K → 25.2M3057-27#8578#8605
25.2M → Finish9354+39#8605#8566
TOTALS3459*555+2904

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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