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BOSTON MARATHON 2025

Svetlana Kozak

Bib: 22603•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:27/mi
26:16
↑ 97↓ 3451.5%
10K· 6.21 mi
9:08/mi
54:40
↑ 79↓ 1380.4%
15K· 9.32 mi
9:42/mi
1:24:47
↑ 67↓ 78
20K· 12.43 mi
10:14/mi
1:56:35
↑ 106↓ 860.1%
Half· 13.11 mi
9:58/mi
2:03:23
↑ 19↓ 370.5%
25K· 15.53 mi
10:50/mi
2:29:38
↑ 66↓ 880.2%
30K· 18.64 mi
11:22/mi
3:04:56
↑ 181↓ 1480.2%
20M
11:14/mi
3:20:12
↑ 64↓ 500.2%
21M
13:09/mi
3:33:21
↑ 106↓ 241.6%
35K· 21.75 mi
10:34/mi
3:41:15
↑ 17↓ 861.7%
23M
11:48/mi
3:56:02
↑ 23↓ 630.6%
24M
10:51/mi
4:06:53
↓ 821.3%
40K· 24.85 mi
11:44/mi
4:16:55
↓ 200.3%
25.2M
12:48/mi
4:21:20
↑ 13↓ 160.2%
Finish· 26.22 mi
11:07/mi
4:32:40
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:03:23
Pace9:25 /mi
2nd Half
Distance13.11 mi
Time2:29:17
Pace11:23 /mi
📊Positive Split: 21.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:2226:168:2726:16
8:27
-
10K
6.21 mi11:52:4654:408:4828:24
9:08
+0:41
15K
9.32 mi12:22:531:24:479:0630:07
9:42
+0:34
20K
12.43 mi12:54:411:56:359:2331:48
10:14
+0:32
Half
13.11 mi13:01:292:03:239:256:48
9:58
-0:16
25K
15.53 mi13:27:442:29:389:3826:15
10:50
+0:52
30K
18.64 mi14:03:023:04:569:5535:18
11:22
+0:32
20M
20.00 mi14:18:183:20:1210:0115:16
11:14
-0:08
21M
21.00 mi14:31:273:33:2110:1013:09
13:09
+1:55
35K
21.75 mi14:39:213:41:1510:107:54
10:34
-2:35
23M
23.00 mi14:54:083:56:0210:1614:47
11:48
+1:14
24M
24.00 mi15:04:594:06:5310:1710:51
10:51
-0:57
40K
24.85 mi15:15:014:16:5510:2010:02
11:44
+0:53
25.2M
25.20 mi15:19:264:21:2010:224:25
12:48
+1:04
Finish
26.22 mi15:30:464:32:4010:2411:20
11:07
-1:41

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

8:27 /mi

Average Pace

10:24 /mi

Slowest Pace

13:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:23

45% of race

Time at Steady Pace

1:46:54

39% of race

Time at Slower Pace

42:23

16% of race

Average Pace: 10:24 /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 mi11:24:2226:168:2726:16
8:27
#19638
10K
6.21 mi11:52:4654:408:4828:24
9:08
#21444
15K
9.32 mi12:22:531:24:479:0630:07
9:42
#22687
20K
12.43 mi12:54:411:56:359:2331:48
10:14
#23398
Half
13.11 mi13:01:292:03:239:256:48
9:58
#23495
25K
15.53 mi13:27:442:29:389:3826:15
10:50
#23783
30K
18.64 mi14:03:023:04:569:5535:18
11:22
#24028
20M
20.00 mi14:18:183:20:1210:0115:16
11:14
#24028
21M
21.00 mi14:31:273:33:2110:1013:09
13:09
#24141
35K
21.75 mi14:39:213:41:1510:107:54
10:34
#24104
23M
23.00 mi14:54:083:56:0210:1614:47
11:48
#24156
24M
24.00 mi15:04:594:06:5310:1710:51
10:51
#24145
40K
24.85 mi15:15:014:16:5510:2010:02
11:44
#24177
25.2M
25.20 mi15:19:264:21:2010:224:25
12:48
#24187
Finish
26.22 mi15:30:464:32:4010:2411:20
11:07
#24245
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi196387285728524267(Top 85%)9820(Top 80%)9820(Top 542%)
10K6.21 mi3.10 mi21444-18068306-10218306-102122975(Top 81%)9122(Top 75%)9122(Top 503%)
15K9.32 mi3.11 mi22687-12438955-6498955-64924267(Top 85%)9820(Top 80%)9820(Top 542%)
20K12.43 mi3.11 mi23398-7119339-3849339-38424722(Top 87%)10116(Top 83%)10116(Top 558%)
Half13.11 mi0.68 mi23495-979395-569395-5624781(Top 87%)10148(Top 83%)10148(Top 560%)
25K15.53 mi2.42 mi23783-2889576-1819576-18124953(Top 88%)10262(Top 84%)10262(Top 566%)
30K18.64 mi3.11 mi24028-2459744-1689744-16824634(Top 87%)10195(Top 83%)10195(Top 562%)
20M20.00 mi1.36 mi240289770-269770-2624077(Top 85%)9995(Top 82%)9995(Top 551%)
21M21.00 mi1.00 mi24141-1139837-679837-6725253(Top 89%)10695(Top 87%)10695(Top 590%)
35K21.75 mi0.75 mi24104+379827+109827+1023309(Top 82%)9712(Top 79%)9712(Top 536%)
23M23.00 mi1.25 mi24156-529884-579884-5724788(Top 87%)10490(Top 86%)10490(Top 579%)
24M24.00 mi1.00 mi24145+119892-89892-823684(Top 83%)9971(Top 82%)9971(Top 550%)
40K24.85 mi0.85 mi24177-329920-289920-2824538(Top 86%)10443(Top 85%)10443(Top 576%)
25.2M25.20 mi0.35 mi24187-109930-109930-1024777(Top 87%)10562(Top 86%)10562(Top 583%)
Finish26.22 mi1.02 mi24245-589968-389968-3825596(Top 90%)10954(Top 90%)10954(Top 604%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 85%
×21story building
+97ft-345ft

Overall

24267

Females

9820

F45-49

9820

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

22975

Females

9122

F45-49

9122

10K→15K

6.2 - 9.3 mi

Top 85%
×3story building
+67ft-78ft

Overall

24267

Females

9820

F45-49

9820

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

24722

Females

10116

F45-49

10116

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

24781

Females

10148

F45-49

10148

Half→25K

13.1 - 15.5 mi

Top 88%
×4story building
+66ft-88ft

Overall

24953

Females

10262

F45-49

10262

25K→30K

15.5 - 18.6 mi

Top 87%
×9story building
+181ft-148ft

Overall

24634

Females

10195

F45-49

10195

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

24077

Females

9995

F45-49

9995

20M→21M

20.0 - 21.0 mi

Top 89%
×8story building
+106ft-24ft

Overall

25253

Females

10695

F45-49

10695

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23309

Females

9712

F45-49

9712

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

24788

Females

10490

F45-49

10490

23M→24M

23.0 - 24.0 mi

Top 83%
×6story building
+12ft-82ft

Overall

23684

Females

9971

F45-49

9971

24M→40K

24.0 - 24.9 mi

Top 86%
×1story
+6ft-20ft

Overall

24538

Females

10443

F45-49

10443

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24777

Females

10562

F45-49

10562

25.2M→Finish

25.2 - 26.2 mi

Top 90%
×2story building
+22ft-21ft

Overall

25596

Females

10954

F45-49

10954

Passing Analysis

Category:
Athletes Passed
549
Passed By
5156
Net Change
-4607
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19638
5K → 10K151821-1806#19638#21444
10K → 15K271270-1243#21444#22687
15K → 20K43754-711#22687#23398
20K → Half7104-97#23398#23495
Half → 25K52340-288#23495#23783
25K → 30K84329-245#23783#24028
30K → 20M76760#24028#24028
20M → 21M24137-113#24028#24141
21M → 35K4710+37#24141#24104
35K → 23M55107-52#24104#24156
23M → 24M5140+11#24156#24145
24M → 40K3365-32#24145#24177
40K → 25.2M1424-10#24177#24187
25.2M → Finish2179-58#24187#24245
TOTALS5495156-4607
📊

Passing Visuals

Category:
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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