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BOSTON MARATHON 2025

Semira Rivers

Bib: 13358•F

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0:00
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Overall
#0 / 28404
Top 23%
Gender (Female)
#0 / 12228
Top 7%
Division (F18-39)
#0 / 5469
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:17
Rank: #9244
Start → 5K
22:17 | 7:10/mi
10K· 6.21 mi
44:31
Rank: #9154 (+90)
5K → 10K
22:14 | 7:09/mi
15K· 9.32 mi
1:06:49
Rank: #9054 (+100)
10K → 15K
22:18 | 7:11/mi
20K· 12.43 mi
1:29:06
Rank: #8723 (+331)
15K → 20K
22:17 | 7:10/mi
Half· 13.11 mi
1:34:00
Rank: #8708 (+15)
20K → Half
4:54 | 7:11/mi
25K· 15.53 mi
1:51:25
Rank: #8443 (+265)
Half → 25K
17:25 | 7:11/mi
30K· 18.64 mi
2:13:52
Rank: #7907 (+536)
25K → 30K
22:27 | 7:14/mi
20M
2:23:43
Rank: #7651 (+256)
30K → 20M
9:51 | 7:15/mi
21M
2:31:05
Rank: #7345 (+306)
20M → 21M
7:22 | 7:22/mi
35K· 21.75 mi
2:36:20
Rank: #7243 (+102)
21M → 35K
5:15 | 7:01/mi
23M
2:45:18
Rank: #7023 (+220)
35K → 23M
8:58 | 7:10/mi
24M
2:52:14
Rank: #6835 (+188)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
2:58:16
Rank: #6652 (+183)
24M → 40K
6:02 | 7:03/mi
25.2M
3:00:56
Rank: #6599 (+53)
40K → 25.2M
2:40 | 7:44/mi
Finish· 26.22 mi
3:07:52
Rank: #6456 (+143)
25.2M → Finish
6:56 | 6:48/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:34:00
Pace7:10 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:33:52
Pace7:10 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:5922:177:1022:17
7:10
-
10K
6.21 mi11:13:1344:317:1022:14
7:09
-0:01
15K
9.32 mi11:35:311:06:497:1022:18
7:11
+0:02
20K
12.43 mi11:57:481:29:067:1022:17
7:10
-0:01
Half
13.11 mi12:02:421:34:007:104:54
7:11
+0:01
25K
15.53 mi12:20:071:51:257:1017:25
7:11
0:00
30K
18.64 mi12:42:342:13:527:1122:27
7:14
+0:03
20M
20.00 mi12:52:252:23:437:119:51
7:15
+0:01
21M
21.00 mi12:59:472:31:057:127:22
7:22
+0:07
35K
21.75 mi13:05:022:36:207:115:15
7:01
-0:21
23M
23.00 mi13:14:002:45:187:118:58
7:10
+0:09
24M
24.00 mi13:20:562:52:147:116:56
6:56
-0:14
40K
24.85 mi13:26:582:58:167:106:02
7:03
+0:07
25.2M
25.20 mi13:29:383:00:567:112:40
7:44
+0:41
Finish
26.22 mi13:36:343:07:527:106:56
6:48
-0:56

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

6:48 /mi

Average Pace

7:10 /mi

Slowest Pace

7:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:05:12

99% of race

Time at Steady Pace

2:40

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:10 /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 mi10:50:5922:177:1022:17
7:10
#9244
10K
6.21 mi11:13:1344:317:1022:14
7:09
#9154
15K
9.32 mi11:35:311:06:497:1022:18
7:11
#9054
20K
12.43 mi11:57:481:29:067:1022:17
7:10
#8723
Half
13.11 mi12:02:421:34:007:104:54
7:11
#8708
25K
15.53 mi12:20:071:51:257:1017:25
7:11
#8443
30K
18.64 mi12:42:342:13:527:1122:27
7:14
#7907
20M
20.00 mi12:52:252:23:437:119:51
7:15
#7651
21M
21.00 mi12:59:472:31:057:127:22
7:22
#7345
35K
21.75 mi13:05:022:36:207:115:15
7:01
#7243
23M
23.00 mi13:14:002:45:187:118:58
7:10
#7023
24M
24.00 mi13:20:562:52:147:116:56
6:56
#6835
40K
24.85 mi13:26:582:58:167:106:02
7:03
#6652
25.2M
25.20 mi13:29:383:00:567:112:40
7:44
#6599
Finish
26.22 mi13:36:343:07:527:106:56
6:48
#6456
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9244147714778940(Top 31%)1399(Top 11%)1399(Top 26%)
10K6.21 mi3.10 mi9154+901443+341443+349132(Top 32%)1427(Top 12%)1427(Top 26%)
15K9.32 mi3.11 mi9054+1001417+261417+268940(Top 31%)1399(Top 11%)1399(Top 26%)
20K12.43 mi3.11 mi8723+3311303+1141303+1147990(Top 28%)1097(Top 9%)1097(Top 20%)
Half13.11 mi0.68 mi8708+151304-11304-18956(Top 32%)1457(Top 12%)1457(Top 27%)
25K15.53 mi2.42 mi8443+2651219+851219+857491(Top 26%)1026(Top 8%)1026(Top 19%)
30K18.64 mi3.11 mi7907+5361072+1471072+1476050(Top 21%)691(Top 6%)691(Top 13%)
20M20.00 mi1.36 mi7651+2561006+661006+665514(Top 19%)650(Top 5%)650(Top 12%)
21M21.00 mi1.00 mi7345+306936+70936+703981(Top 14%)363(Top 3%)363(Top 7%)
35K21.75 mi0.75 mi7243+102928+8928+85514(Top 19%)764(Top 6%)764(Top 14%)
23M23.00 mi1.25 mi7023+220894+34894+344680(Top 16%)581(Top 5%)581(Top 11%)
24M24.00 mi1.00 mi6835+188861+33861+334301(Top 15%)523(Top 4%)523(Top 10%)
40K24.85 mi0.85 mi6652+183837+24837+244254(Top 15%)569(Top 5%)569(Top 10%)
25.2M25.20 mi0.35 mi6599+53833+4833+44598(Top 16%)745(Top 6%)745(Top 14%)
Finish26.22 mi1.02 mi6456+143811+22811+224556(Top 16%)711(Top 6%)711(Top 13%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21stories
+97ft-345ft

Overall

8940

Females

1399

F18-39

1399

5K→10K

3.1 - 6.2 mi

Top 32%
×5stories
+79ft-138ft

Overall

9132

Females

1427

F18-39

1427

10K→15K

6.2 - 9.3 mi

Top 31%
×3stories
+67ft-78ft

Overall

8940

Females

1399

F18-39

1399

15K→20K

9.3 - 12.4 mi

Top 28%
×5stories
+106ft-86ft

Overall

7990

Females

1097

F18-39

1097

20K→Half

12.4 - 13.1 mi

Top 32%
×2stories
+19ft-37ft

Overall

8956

Females

1457

F18-39

1457

Half→25K

13.1 - 15.5 mi

Top 26%
×4stories
+66ft-88ft

Overall

7491

Females

1026

F18-39

1026

25K→30K

15.5 - 18.6 mi

Top 21%
×9stories
+181ft-148ft

Overall

6050

Females

691

F18-39

691

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5514

Females

650

F18-39

650

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3981

Females

363

F18-39

363

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5514

Females

764

F18-39

764

35K→23M

21.8 - 23.0 mi

Top 16%
×5stories
+23ft-63ft

Overall

4680

Females

581

F18-39

581

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4301

Females

523

F18-39

523

24M→40K

24.0 - 24.9 mi

Top 15%
×1story
+6ft-20ft

Overall

4254

Females

569

F18-39

569

40K→25.2M

24.9 - 25.2 mi

Top 16%
×1story
+13ft-16ft

Overall

4598

Females

745

F18-39

745

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4556

Females

711

F18-39

711

Passing Analysis

Category:
Athletes Passed
3208
Passed By
420
Net Change
+2788
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9244
5K → 10K278188+90#9244#9154
10K → 15K213113+100#9154#9054
15K → 20K35827+331#9054#8723
20K → Half3722+15#8723#8708
Half → 25K29126+265#8708#8443
25K → 30K5415+536#8443#7907
30K → 20M2571+256#7907#7651
20M → 21M3060+306#7651#7345
21M → 35K1064+102#7345#7243
35K → 23M2244+220#7243#7023
23M → 24M1924+188#7023#6835
24M → 40K1885+183#6835#6652
40K → 25.2M585+53#6652#6599
25.2M → Finish15916+143#6599#6456
TOTALS3208420+2788
📊

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