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BOSTON MARATHON 2025

Karthik Viswanathan

Bib: 30365•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:14
Rank: #24917
Start → 5K
9:44/mi
30:14 split
10K· 6.21 mi
59:55
Rank: #24577 (+340)
5K → 10K
9:33/mi
29:41 split
15K· 9.32 mi
1:30:29
Rank: #24596 (-19)
10K → 15K
9:50/mi
30:34 split
20K· 12.43 mi
2:01:38
Rank: #24512 (+84)
15K → 20K
10:02/mi
31:09 split
Half· 13.11 mi
2:08:23
Rank: #24508 (+4)
20K → Half
9:54/mi
6:45 split
25K· 15.53 mi
2:32:54
Rank: #24356 (+152)
Half → 25K
10:07/mi
24:31 split
30K· 18.64 mi
3:05:14
Rank: #24063 (+293)
25K → 30K
10:24/mi
32:20 split
20M
3:19:50
Rank: #23989 (+74)
30K → 20M
10:45/mi
14:36 split
21M
3:30:57
Rank: #23846 (+143)
20M → 21M
11:07/mi
11:07 split
35K· 21.75 mi
3:38:56
Rank: #23820 (+26)
21M → 35K
10:40/mi
7:59 split
23M
3:52:34
Rank: #23782 (+38)
35K → 23M
10:53/mi
13:38 split
24M
4:02:44
Rank: #23708 (+74)
23M → 24M
10:10/mi
10:10 split
40K· 24.85 mi
4:11:21
Rank: #23609 (+99)
24M → 40K
10:05/mi
8:37 split
25.2M
4:15:11
Rank: #23571 (+38)
40K → 25.2M
11:07/mi
3:50 split
Finish· 26.22 mi
4:24:39
Rank: #23457 (+114)
25.2M → Finish
9:17/mi
9:28 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:23
Pace9:48 /mi
2nd Half
Distance13.11 mi
Time2:16:16
Pace10:24 /mi
📊Positive Split: 6.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:3830:149:4430:14
9:44
-
10K
6.21 mi12:19:1959:559:3929:41
9:33
-0:11
15K
9.32 mi12:49:531:30:299:4230:34
9:50
+0:17
20K
12.43 mi13:21:022:01:389:4731:09
10:02
+0:12
Half
13.11 mi13:27:472:08:239:486:45
9:54
-0:08
25K
15.53 mi13:52:182:32:549:5124:31
10:07
+0:13
30K
18.64 mi14:24:383:05:149:5632:20
10:24
+0:17
20M
20.00 mi14:39:143:19:509:5914:36
10:45
+0:21
21M
21.00 mi14:50:213:30:5710:0311:07
11:07
+0:22
35K
21.75 mi14:58:203:38:5610:047:59
10:40
-0:27
23M
23.00 mi15:11:583:52:3410:0713:38
10:53
+0:13
24M
24.00 mi15:22:084:02:4410:0710:10
10:10
-0:43
40K
24.85 mi15:30:454:11:2110:078:37
10:05
-0:05
25.2M
25.20 mi15:34:354:15:1110:083:50
11:07
+1:02
Finish
26.22 mi15:44:034:24:3910:069:28
9:17
-1:50

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

9:17 /mi

Average Pace

10:06 /mi

Slowest Pace

11:07 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:01:09

68% of race

Time at Steady Pace

1:08:33

26% of race

Time at Slower Pace

14:57

6% of race

Average Pace: 10:06 /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 mi11:49:3830:149:4430:14
9:44
#24917
10K
6.21 mi12:19:1959:559:3929:41
9:33
#24577
15K
9.32 mi12:49:531:30:299:4230:34
9:50
#24596
20K
12.43 mi13:21:022:01:389:4731:09
10:02
#24512
Half
13.11 mi13:27:472:08:239:486:45
9:54
#24508
25K
15.53 mi13:52:182:32:549:5124:31
10:07
#24356
30K
18.64 mi14:24:383:05:149:5632:20
10:24
#24063
20M
20.00 mi14:39:143:19:509:5914:36
10:45
#23989
21M
21.00 mi14:50:213:30:5710:0311:07
11:07
#23846
35K
21.75 mi14:58:203:38:5610:047:59
10:40
#23820
23M
23.00 mi15:11:583:52:3410:0713:38
10:53
#23782
24M
24.00 mi15:22:084:02:4410:0710:10
10:10
#23708
40K
24.85 mi15:30:454:11:2110:078:37
10:05
#23609
25.2M
25.20 mi15:34:354:15:1110:083:50
11:07
#23571
Finish
26.22 mi15:44:034:24:3910:069:28
9:17
#23457
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi24917146861468624630(Top 87%)14544(Top 90%)14544(Top 610%)
10K6.21 mi3.10 mi24577+34014525+16114525+16124238(Top 85%)14348(Top 89%)14348(Top 601%)
15K9.32 mi3.11 mi24596-1914522+314522+324630(Top 87%)14544(Top 90%)14544(Top 610%)
20K12.43 mi3.11 mi24512+8414466+5614466+5624270(Top 85%)14343(Top 89%)14343(Top 601%)
Half13.11 mi0.68 mi24508+414464+214464+224585(Top 87%)14473(Top 90%)14473(Top 607%)
25K15.53 mi2.42 mi24356+15214382+8214382+8223530(Top 83%)13973(Top 87%)13973(Top 586%)
30K18.64 mi3.11 mi24063+29314238+14414238+14422729(Top 80%)13497(Top 84%)13497(Top 566%)
20M20.00 mi1.36 mi23989+7414183+5514183+5523051(Top 81%)13546(Top 84%)13546(Top 568%)
21M21.00 mi1.00 mi23846+14314105+7814105+7821698(Top 76%)12834(Top 80%)12834(Top 538%)
35K21.75 mi0.75 mi23820+2614079+2614079+2623514(Top 83%)13642(Top 85%)13642(Top 572%)
23M23.00 mi1.25 mi23782+3814036+4314036+4322965(Top 81%)13324(Top 83%)13324(Top 558%)
24M24.00 mi1.00 mi23708+7413991+4513991+4521841(Top 77%)12729(Top 79%)12729(Top 533%)
40K24.85 mi0.85 mi23609+9913927+6413927+6420709(Top 73%)12149(Top 75%)12149(Top 509%)
25.2M25.20 mi0.35 mi23571+3813898+2913898+2920987(Top 74%)12295(Top 76%)12295(Top 515%)
Finish26.22 mi1.02 mi23457+11413832+6613832+6620340(Top 72%)11983(Top 74%)11983(Top 502%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 87%
×21story building
+97ft-345ft

Overall

24630

Males

14544

M45-49

14544

5K→10K

3.1 - 6.2 mi

Top 85%
×5story building
+79ft-138ft

Overall

24238

Males

14348

M45-49

14348

10K→15K

6.2 - 9.3 mi

Top 87%
×3story building
+67ft-78ft

Overall

24630

Males

14544

M45-49

14544

15K→20K

9.3 - 12.4 mi

Top 85%
×5story building
+106ft-86ft

Overall

24270

Males

14343

M45-49

14343

20K→Half

12.4 - 13.1 mi

Top 87%
×2story building
+19ft-37ft

Overall

24585

Males

14473

M45-49

14473

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

23530

Males

13973

M45-49

13973

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

22729

Males

13497

M45-49

13497

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

23051

Males

13546

M45-49

13546

20M→21M

20.0 - 21.0 mi

Top 76%
×8story building
+106ft-24ft

Overall

21698

Males

12834

M45-49

12834

21M→35K

21.0 - 21.8 mi

Top 83%
×7story building
+17ft-86ft

Overall

23514

Males

13642

M45-49

13642

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

22965

Males

13324

M45-49

13324

23M→24M

23.0 - 24.0 mi

Top 77%
×6story building
+12ft-82ft

Overall

21841

Males

12729

M45-49

12729

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

20709

Males

12149

M45-49

12149

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

20987

Males

12295

M45-49

12295

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

20340

Males

11983

M45-49

11983

Passing Analysis

Category:
Athletes Passed
2018
Passed By
558
Net Change
+1460
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24917
5K → 10K40969+340#24917#24577
10K → 15K135154-19#24577#24596
15K → 20K17692+84#24596#24512
20K → Half2521+4#24512#24508
Half → 25K18836+152#24508#24356
25K → 30K33946+293#24356#24063
30K → 20M11036+74#24063#23989
20M → 21M1518+143#23989#23846
21M → 35K4923+26#23846#23820
35K → 23M8951+38#23820#23782
23M → 24M817+74#23782#23708
24M → 40K1067+99#23708#23609
40K → 25.2M446+38#23609#23571
25.2M → Finish1162+114#23571#23457
TOTALS2018558+1460
📊

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