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BOSTON MARATHON 2025

Nasera Souidi-Johnson

Bib: 23685•F

TN

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F50-54)
#0 / 1303
Top 50%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:48
Rank: #20617
Start → 5K
26:48 | 8:38/mi
10K· 6.21 mi
53:56
Rank: #20809 (-192)
5K → 10K
27:08 | 8:44/mi
15K· 9.32 mi
1:20:59
Rank: #20705 (+104)
10K → 15K
27:03 | 8:42/mi
20K· 12.43 mi
1:48:13
Rank: #20463 (+242)
15K → 20K
27:14 | 8:46/mi
Half· 13.11 mi
1:54:07
Rank: #20439 (+24)
20K → Half
5:54 | 8:39/mi
25K· 15.53 mi
2:15:43
Rank: #20287 (+152)
Half → 25K
21:36 | 8:55/mi
30K· 18.64 mi
2:44:45
Rank: #20082 (+205)
25K → 30K
29:02 | 9:21/mi
20M
2:57:45
Rank: #20020 (+62)
30K → 20M
13:00 | 9:34/mi
21M
3:07:44
Rank: #19901 (+119)
20M → 21M
9:59 | 9:59/mi
35K· 21.75 mi
3:14:28
Rank: #19835 (+66)
21M → 35K
6:44 | 9:00/mi
23M
3:25:55
Rank: #19666 (+169)
35K → 23M
11:27 | 9:09/mi
24M
3:34:43
Rank: #19540 (+126)
23M → 24M
8:48 | 8:48/mi
40K· 24.85 mi
3:42:14
Rank: #19368 (+172)
24M → 40K
7:31 | 8:47/mi
25.2M
3:45:32
Rank: #19295 (+73)
40K → 25.2M
3:18 | 9:34/mi
Finish· 26.22 mi
3:54:22
Rank: #19218 (+77)
25.2M → Finish
8:50 | 8:40/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:54:07
Pace8:42 /mi
2nd Half
Distance13.11 mi
Time2:00:15
Pace9:10 /mi
📊Positive Split: 5.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:2026:488:3826:48
8:38
-
10K
6.21 mi11:52:2853:568:4127:08
8:44
+0:06
15K
9.32 mi12:19:311:20:598:4127:03
8:42
-0:02
20K
12.43 mi12:46:451:48:138:4227:14
8:46
+0:04
Half
13.11 mi12:52:391:54:078:425:54
8:39
-0:07
25K
15.53 mi13:14:152:15:438:4421:36
8:55
+0:16
30K
18.64 mi13:43:172:44:458:5029:02
9:21
+0:26
20M
20.00 mi13:56:172:57:458:5313:00
9:34
+0:13
21M
21.00 mi14:06:163:07:448:569:59
9:59
+0:25
35K
21.75 mi14:13:003:14:288:576:44
9:00
-0:59
23M
23.00 mi14:24:273:25:558:5711:27
9:09
+0:09
24M
24.00 mi14:33:153:34:438:578:48
8:48
-0:21
40K
24.85 mi14:40:463:42:148:567:31
8:47
-0:01
25.2M
25.20 mi14:44:043:45:328:573:18
9:34
+0:47
Finish
26.22 mi14:52:543:54:228:578:50
8:40
-0:54

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

8:38 /mi

Average Pace

8:57 /mi

Slowest Pace

9:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:28:05

89% of race

Time at Steady Pace

26:17

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:56 /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 mi11:25:2026:488:3826:48
8:38
#20617
10K
6.21 mi11:52:2853:568:4127:08
8:44
#20809
15K
9.32 mi12:19:311:20:598:4127:03
8:42
#20705
20K
12.43 mi12:46:451:48:138:4227:14
8:46
#20463
Half
13.11 mi12:52:391:54:078:425:54
8:39
#20439
25K
15.53 mi13:14:152:15:438:4421:36
8:55
#20287
30K
18.64 mi13:43:172:44:458:5029:02
9:21
#20082
20M
20.00 mi13:56:172:57:458:5313:00
9:34
#20020
21M
21.00 mi14:06:163:07:448:569:59
9:59
#19901
35K
21.75 mi14:13:003:14:288:576:44
9:00
#19835
23M
23.00 mi14:24:273:25:558:5711:27
9:09
#19666
24M
24.00 mi14:33:153:34:438:578:48
8:48
#19540
40K
24.85 mi14:40:463:42:148:567:31
8:47
#19368
25.2M
25.20 mi14:44:043:45:328:573:18
9:34
#19295
Finish
26.22 mi14:52:543:54:228:578:50
8:40
#19218
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi206177866786620535(Top 72%)7734(Top 63%)7734(Top 594%)
10K6.21 mi3.10 mi20809-1927945-797945-7921078(Top 74%)8061(Top 66%)8061(Top 619%)
15K9.32 mi3.11 mi20705+1047865+807865+8020535(Top 72%)7734(Top 63%)7734(Top 594%)
20K12.43 mi3.11 mi20463+2427738+1277738+12719774(Top 70%)7356(Top 60%)7356(Top 565%)
Half13.11 mi0.68 mi20439+247731+77731+720081(Top 71%)7521(Top 62%)7521(Top 577%)
25K15.53 mi2.42 mi20287+1527652+797652+7919481(Top 69%)7247(Top 59%)7247(Top 556%)
30K18.64 mi3.11 mi20082+2057569+837569+8319323(Top 68%)7297(Top 60%)7297(Top 560%)
20M20.00 mi1.36 mi20020+627556+137556+1319485(Top 69%)7513(Top 61%)7513(Top 577%)
21M21.00 mi1.00 mi19901+1197513+437513+4318251(Top 64%)6922(Top 57%)6922(Top 531%)
35K21.75 mi0.75 mi19835+667493+207493+2018264(Top 64%)7056(Top 58%)7056(Top 542%)
23M23.00 mi1.25 mi19666+1697434+597434+5917107(Top 60%)6517(Top 53%)6517(Top 500%)
24M24.00 mi1.00 mi19540+1267384+507384+5016359(Top 58%)6139(Top 50%)6139(Top 471%)
40K24.85 mi0.85 mi19368+1727305+797305+7915199(Top 54%)5643(Top 46%)5643(Top 433%)
25.2M25.20 mi0.35 mi19295+737275+307275+3015052(Top 53%)5599(Top 46%)5599(Top 430%)
Finish26.22 mi1.02 mi19218+777256+197256+1917322(Top 61%)6725(Top 55%)6725(Top 516%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 72%
×21stories
+97ft-345ft

Overall

20535

Females

7734

F50-54

7734

5K→10K

3.1 - 6.2 mi

Top 74%
×5stories
+79ft-138ft

Overall

21078

Females

8061

F50-54

8061

10K→15K

6.2 - 9.3 mi

Top 72%
×3stories
+67ft-78ft

Overall

20535

Females

7734

F50-54

7734

15K→20K

9.3 - 12.4 mi

Top 70%
×5stories
+106ft-86ft

Overall

19774

Females

7356

F50-54

7356

20K→Half

12.4 - 13.1 mi

Top 71%
×2stories
+19ft-37ft

Overall

20081

Females

7521

F50-54

7521

Half→25K

13.1 - 15.5 mi

Top 69%
×4stories
+66ft-88ft

Overall

19481

Females

7247

F50-54

7247

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

19323

Females

7297

F50-54

7297

30K→20M

18.6 - 20.0 mi

Top 69%
×5stories
+64ft-50ft

Overall

19485

Females

7513

F50-54

7513

20M→21M

20.0 - 21.0 mi

Top 64%
×8stories
+106ft-24ft

Overall

18251

Females

6922

F50-54

6922

21M→35K

21.0 - 21.8 mi

Top 64%
×7stories
+17ft-86ft

Overall

18264

Females

7056

F50-54

7056

35K→23M

21.8 - 23.0 mi

Top 60%
×5stories
+23ft-63ft

Overall

17107

Females

6517

F50-54

6517

23M→24M

23.0 - 24.0 mi

Top 58%
×6stories
+12ft-82ft

Overall

16359

Females

6139

F50-54

6139

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

15199

Females

5643

F50-54

5643

40K→25.2M

24.9 - 25.2 mi

Top 53%
×1story
+13ft-16ft

Overall

15052

Females

5599

F50-54

5599

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2stories
+22ft-21ft

Overall

17322

Females

6725

F50-54

6725

Passing Analysis

Category:
Athletes Passed
2397
Passed By
998
Net Change
+1399
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20617
5K → 10K203395-192#20617#20809
10K → 15K240136+104#20809#20705
15K → 20K31472+242#20705#20463
20K → Half339+24#20463#20439
Half → 25K23886+152#20439#20287
25K → 30K331126+205#20287#20082
30K → 20M13169+62#20082#20020
20M → 21M15334+119#20020#19901
21M → 35K8317+66#19901#19835
35K → 23M19021+169#19835#19666
23M → 24M1337+126#19666#19540
24M → 40K1775+172#19540#19368
40K → 25.2M752+73#19368#19295
25.2M → Finish9619+77#19295#19218
TOTALS2397998+1399
📊

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