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BOSTON MARATHON 2025

Sean Dundon

Bib: 3141•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 5%
Gender (Male)
#0 / 16105
Top 8%
Division (M18-39)
#0 / 5642
Top 19%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:19
Rank: #785
Start → 5K
18:19 | 5:54/mi
10K· 6.21 mi
36:49
Rank: #874 (-89)
5K → 10K
18:30 | 5:57/mi
15K· 9.32 mi
55:26
Rank: #917 (-43)
10K → 15K
18:37 | 6:00/mi
20K· 12.43 mi
1:14:53
Rank: #1062 (-145)
15K → 20K
19:27 | 6:16/mi
Half· 13.11 mi
1:18:53
Rank: #1041 (+21)
20K → Half
4:00 | 5:52/mi
25K· 15.53 mi
1:33:35
Rank: #1020 (+21)
Half → 25K
14:42 | 6:04/mi
30K· 18.64 mi
1:53:53
Rank: #1156 (-136)
25K → 30K
20:18 | 6:32/mi
20M
2:02:47
Rank: #1181 (-25)
30K → 20M
8:54 | 6:33/mi
21M
2:09:47
Rank: #1211 (-30)
20M → 21M
7:00 | 7:00/mi
35K· 21.75 mi
2:14:42
Rank: #1230 (-19)
21M → 35K
4:55 | 6:34/mi
23M
2:22:59
Rank: #1226 (+4)
35K → 23M
8:17 | 6:37/mi
24M
2:29:44
Rank: #1282 (-56)
23M → 24M
6:45 | 6:45/mi
40K· 24.85 mi
2:35:33
Rank: #1318 (-36)
24M → 40K
5:49 | 6:48/mi
25.2M
2:38:06
Rank: #1329 (-11)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
2:44:51
Rank: #1363 (-34)
25.2M → Finish
6:45 | 6:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:53
Pace6:01 /mi
2nd Half
Distance13.11 mi
Time1:25:58
Pace6:33 /mi
📊Positive Split: 9.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:1618:195:5418:19
5:54
-
10K
6.21 mi10:37:4636:495:5618:30
5:57
+0:03
15K
9.32 mi10:56:2355:265:5718:37
6:00
+0:03
20K
12.43 mi11:15:501:14:536:0219:27
6:16
+0:16
Half
13.11 mi11:19:501:18:536:014:00
5:52
-0:24
25K
15.53 mi11:34:321:33:356:0114:42
6:04
+0:12
30K
18.64 mi11:54:501:53:536:0720:18
6:32
+0:28
20M
20.00 mi12:03:442:02:476:088:54
6:33
+0:01
21M
21.00 mi12:10:442:09:476:117:00
7:00
+0:27
35K
21.75 mi12:15:392:14:426:124:55
6:34
-0:26
23M
23.00 mi12:23:562:22:596:138:17
6:37
+0:03
24M
24.00 mi12:30:412:29:446:146:45
6:45
+0:08
40K
24.85 mi12:36:302:35:336:165:49
6:48
+0:03
25.2M
25.20 mi12:39:032:38:066:162:33
7:24
+0:36
Finish
26.22 mi12:45:482:44:516:186:45
6:37
-0:47

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

5:52 /mi

Average Pace

6:18 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:35

57% of race

Time at Steady Pace

55:54

34% of race

Time at Slower Pace

15:22

9% of race

Average Pace: 6:17 /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 mi10:19:1618:195:5418:19
5:54
#785
10K
6.21 mi10:37:4636:495:5618:30
5:57
#874
15K
9.32 mi10:56:2355:265:5718:37
6:00
#917
20K
12.43 mi11:15:501:14:536:0219:27
6:16
#1062
Half
13.11 mi11:19:501:18:536:014:00
5:52
#1041
25K
15.53 mi11:34:321:33:356:0114:42
6:04
#1020
30K
18.64 mi11:54:501:53:536:0720:18
6:32
#1156
20M
20.00 mi12:03:442:02:476:088:54
6:33
#1181
21M
21.00 mi12:10:442:09:476:117:00
7:00
#1211
35K
21.75 mi12:15:392:14:426:124:55
6:34
#1230
23M
23.00 mi12:23:562:22:596:138:17
6:37
#1226
24M
24.00 mi12:30:412:29:446:146:45
6:45
#1282
40K
24.85 mi12:36:302:35:336:165:49
6:48
#1318
25.2M
25.20 mi12:39:032:38:066:162:33
7:24
#1329
Finish
26.22 mi12:45:482:44:516:186:45
6:37
#1363
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi7857327321009(Top 4%)954(Top 6%)954(Top 17%)
10K6.21 mi3.10 mi874-89820-88820-88975(Top 3%)920(Top 6%)920(Top 16%)
15K9.32 mi3.11 mi917-43862-42862-421009(Top 4%)954(Top 6%)954(Top 17%)
20K12.43 mi3.11 mi1062-1451002-1401002-1401829(Top 6%)1740(Top 11%)1740(Top 31%)
Half13.11 mi0.68 mi1041+21981+21981+21755(Top 3%)709(Top 4%)709(Top 13%)
25K15.53 mi2.42 mi1020+21960+21960+21982(Top 3%)926(Top 6%)926(Top 16%)
30K18.64 mi3.11 mi1156-1361092-1321092-1322120(Top 7%)2012(Top 12%)2012(Top 36%)
20M20.00 mi1.36 mi1181-251114-221114-221793(Top 6%)1697(Top 11%)1697(Top 30%)
21M21.00 mi1.00 mi1211-301140-261140-262228(Top 8%)2079(Top 13%)2079(Top 37%)
35K21.75 mi0.75 mi1230-191159-191159-192782(Top 10%)2564(Top 16%)2564(Top 45%)
23M23.00 mi1.25 mi1226+41154+51154+51879(Top 7%)1756(Top 11%)1756(Top 31%)
24M24.00 mi1.00 mi1282-561207-531207-533189(Top 11%)2869(Top 18%)2869(Top 51%)
40K24.85 mi0.85 mi1318-361242-351242-352820(Top 10%)2546(Top 16%)2546(Top 45%)
25.2M25.20 mi0.35 mi1329-111252-101252-102847(Top 10%)2526(Top 16%)2526(Top 45%)
Finish26.22 mi1.02 mi1363-341284-321284-323420(Top 12%)2989(Top 19%)2989(Top 53%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1009

Males

954

M18-39

954

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

975

Males

920

M18-39

920

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1009

Males

954

M18-39

954

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1829

Males

1740

M18-39

1740

20K→Half

12.4 - 13.1 mi

Top 3%
×2stories
+19ft-37ft

Overall

755

Males

709

M18-39

709

Half→25K

13.1 - 15.5 mi

Top 3%
×4stories
+66ft-88ft

Overall

982

Males

926

M18-39

926

25K→30K

15.5 - 18.6 mi

Top 7%
×9stories
+181ft-148ft

Overall

2120

Males

2012

M18-39

2012

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1793

Males

1697

M18-39

1697

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2228

Males

2079

M18-39

2079

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2782

Males

2564

M18-39

2564

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1879

Males

1756

M18-39

1756

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3189

Males

2869

M18-39

2869

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2820

Males

2546

M18-39

2546

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2847

Males

2526

M18-39

2526

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3420

Males

2989

M18-39

2989

Passing Analysis

Category:
Athletes Passed
241
Passed By
819
Net Change
-578
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#785
5K → 10K17106-89#785#874
10K → 15K1255-43#874#917
15K → 20K8153-145#917#1062
20K → Half210+21#1062#1041
Half → 25K3615+21#1041#1020
25K → 30K24160-136#1020#1156
30K → 20M1944-25#1156#1181
20M → 21M2454-30#1181#1211
21M → 35K827-19#1211#1230
35K → 23M4238+4#1230#1226
23M → 24M864-56#1226#1282
24M → 40K541-36#1282#1318
40K → 25.2M516-11#1318#1329
25.2M → Finish1246-34#1329#1363
TOTALS241819-578
📊

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