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BOSTON MARATHON 2025

Samantha Merkel

Bib: 10043•F

MD

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 21%
Gender (Female)
#0 / 12228
Top 5%
Division (F18-39)
#0 / 5469
Top 10%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:18
Rank: #6753
Start → 5K
21:18 | 6:51/mi
10K· 6.21 mi
42:18
Rank: #6393 (+360)
5K → 10K
21:00 | 6:46/mi
15K· 9.32 mi
1:03:18
Rank: #6110 (+283)
10K → 15K
21:00 | 6:46/mi
20K· 12.43 mi
1:24:28
Rank: #5924 (+186)
15K → 20K
21:10 | 6:49/mi
Half· 13.11 mi
1:29:10
Rank: #5973 (-49)
20K → Half
4:42 | 6:53/mi
25K· 15.53 mi
1:46:23
Rank: #6148 (-175)
Half → 25K
17:13 | 7:06/mi
30K· 18.64 mi
2:08:39
Rank: #5996 (+152)
25K → 30K
22:16 | 7:10/mi
20M
2:18:30
Rank: #5910 (+86)
30K → 20M
9:51 | 7:15/mi
21M
2:26:03
Rank: #5785 (+125)
20M → 21M
7:33 | 7:33/mi
35K· 21.75 mi
2:31:21
Rank: #5766 (+19)
21M → 35K
5:18 | 7:05/mi
23M
2:40:47
Rank: #5749 (+17)
35K → 23M
9:26 | 7:32/mi
24M
2:48:34
Rank: #5844 (-95)
23M → 24M
7:47 | 7:47/mi
40K· 24.85 mi
2:55:26
Rank: #5941 (-97)
24M → 40K
6:52 | 8:02/mi
25.2M
2:58:20
Rank: #5934 (+7)
40K → 25.2M
2:54 | 8:25/mi
Finish· 26.22 mi
3:05:54
Rank: #5954 (-20)
25.2M → Finish
7:34 | 7:26/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:10
Pace6:48 /mi
2nd Half
Distance13.11 mi
Time1:36:44
Pace7:23 /mi
📊Positive Split: 8.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:2221:186:5121:18
6:51
-
10K
6.21 mi11:08:2242:186:4821:00
6:46
-0:05
15K
9.32 mi11:29:221:03:186:4721:00
6:46
0:00
20K
12.43 mi11:50:321:24:286:4821:10
6:49
+0:03
Half
13.11 mi11:55:141:29:106:484:42
6:53
+0:04
25K
15.53 mi12:12:271:46:236:5117:13
7:06
+0:13
30K
18.64 mi12:34:432:08:396:5422:16
7:10
+0:04
20M
20.00 mi12:44:342:18:306:559:51
7:15
+0:05
21M
21.00 mi12:52:072:26:036:577:33
7:33
+0:18
35K
21.75 mi12:57:252:31:216:585:18
7:05
-0:28
23M
23.00 mi13:06:512:40:476:599:26
7:32
+0:27
24M
24.00 mi13:14:382:48:347:017:47
7:47
+0:15
40K
24.85 mi13:21:302:55:267:036:52
8:02
+0:15
25.2M
25.20 mi13:24:242:58:207:052:54
8:25
+0:23
Finish
26.22 mi13:31:583:05:547:067:34
7:26
-0:59

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

6:46 /mi

Average Pace

7:06 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:10

48% of race

Time at Steady Pace

54:38

29% of race

Time at Slower Pace

42:06

23% of race

Average Pace: 7:05 /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 mi10:47:2221:186:5121:18
6:51
#6753
10K
6.21 mi11:08:2242:186:4821:00
6:46
#6393
15K
9.32 mi11:29:221:03:186:4721:00
6:46
#6110
20K
12.43 mi11:50:321:24:286:4821:10
6:49
#5924
Half
13.11 mi11:55:141:29:106:484:42
6:53
#5973
25K
15.53 mi12:12:271:46:236:5117:13
7:06
#6148
30K
18.64 mi12:34:432:08:396:5422:16
7:10
#5996
20M
20.00 mi12:44:342:18:306:559:51
7:15
#5910
21M
21.00 mi12:52:072:26:036:577:33
7:33
#5785
35K
21.75 mi12:57:252:31:216:585:18
7:05
#5766
23M
23.00 mi13:06:512:40:476:599:26
7:32
#5749
24M
24.00 mi13:14:382:48:347:017:47
7:47
#5844
40K
24.85 mi13:21:302:55:267:036:52
8:02
#5941
25.2M
25.20 mi13:24:242:58:207:052:54
8:25
#5934
Finish
26.22 mi13:31:583:05:547:067:34
7:26
#5954
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi67536216215710(Top 20%)492(Top 4%)492(Top 9%)
10K6.21 mi3.10 mi6393+360547+74547+745980(Top 21%)496(Top 4%)496(Top 9%)
15K9.32 mi3.11 mi6110+283502+45502+455710(Top 20%)492(Top 4%)492(Top 9%)
20K12.43 mi3.11 mi5924+186490+12490+125449(Top 19%)454(Top 4%)454(Top 8%)
Half13.11 mi0.68 mi5973-49501-11501-116877(Top 24%)735(Top 6%)735(Top 13%)
25K15.53 mi2.42 mi6148-175563-62563-626990(Top 25%)857(Top 7%)857(Top 16%)
30K18.64 mi3.11 mi5996+152545+18545+185729(Top 20%)603(Top 5%)603(Top 11%)
20M20.00 mi1.36 mi5910+86546-1546-15509(Top 19%)645(Top 5%)645(Top 12%)
21M21.00 mi1.00 mi5785+125526+20526+204895(Top 17%)586(Top 5%)586(Top 11%)
35K21.75 mi0.75 mi5766+19534-8534-85926(Top 21%)894(Top 7%)894(Top 16%)
23M23.00 mi1.25 mi5749+17551-17551-176834(Top 24%)1317(Top 11%)1317(Top 24%)
24M24.00 mi1.00 mi5844-95591-40591-409688(Top 34%)2642(Top 22%)2642(Top 48%)
40K24.85 mi0.85 mi5941-97624-33624-3310428(Top 37%)3128(Top 26%)3128(Top 57%)
25.2M25.20 mi0.35 mi5934+7632-8632-88274(Top 29%)2154(Top 18%)2154(Top 39%)
Finish26.22 mi1.02 mi5954-20656-24656-248679(Top 31%)2370(Top 19%)2370(Top 43%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5710

Females

492

F18-39

492

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

5980

Females

496

F18-39

496

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5710

Females

492

F18-39

492

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5449

Females

454

F18-39

454

20K→Half

12.4 - 13.1 mi

Top 24%
×2stories
+19ft-37ft

Overall

6877

Females

735

F18-39

735

Half→25K

13.1 - 15.5 mi

Top 25%
×4stories
+66ft-88ft

Overall

6990

Females

857

F18-39

857

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5729

Females

603

F18-39

603

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5509

Females

645

F18-39

645

20M→21M

20.0 - 21.0 mi

Top 17%
×8stories
+106ft-24ft

Overall

4895

Females

586

F18-39

586

21M→35K

21.0 - 21.8 mi

Top 21%
×7stories
+17ft-86ft

Overall

5926

Females

894

F18-39

894

35K→23M

21.8 - 23.0 mi

Top 24%
×5stories
+23ft-63ft

Overall

6834

Females

1317

F18-39

1317

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9688

Females

2642

F18-39

2642

24M→40K

24.0 - 24.9 mi

Top 37%
×1story
+6ft-20ft

Overall

10428

Females

3128

F18-39

3128

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8274

Females

2154

F18-39

2154

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2stories
+22ft-21ft

Overall

8679

Females

2370

F18-39

2370

Passing Analysis

Category:
Athletes Passed
1859
Passed By
1060
Net Change
+799
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6753
5K → 10K41757+360#6753#6393
10K → 15K32845+283#6393#6110
15K → 20K23650+186#6110#5924
20K → Half958-49#5924#5973
Half → 25K84259-175#5973#6148
25K → 30K24795+152#6148#5996
30K → 20M11428+86#5996#5910
20M → 21M13914+125#5910#5785
21M → 35K5132+19#5785#5766
35K → 23M8366+17#5766#5749
23M → 24M35130-95#5749#5844
24M → 40K27124-97#5844#5941
40K → 25.2M2922+7#5941#5934
25.2M → Finish6080-20#5934#5954
TOTALS18591060+799
📊

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