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BOSTON MARATHON 2025

Sean Flack

Bib: 15944•M

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:45
Rank: #18625
Start → 5K
25:45 | 8:17/mi
10K· 6.21 mi
51:50
Rank: #18860 (-235)
5K → 10K
26:05 | 8:24/mi
15K· 9.32 mi
1:18:03
Rank: #18876 (-16)
10K → 15K
26:13 | 8:26/mi
20K· 12.43 mi
1:44:41
Rank: #18795 (+81)
15K → 20K
26:38 | 8:34/mi
Half· 13.11 mi
1:50:26
Rank: #18797 (-2)
20K → Half
5:45 | 8:26/mi
25K· 15.53 mi
2:10:53
Rank: #18440 (+357)
Half → 25K
20:27 | 8:26/mi
30K· 18.64 mi
2:38:03
Rank: #17958 (+482)
25K → 30K
27:10 | 8:45/mi
20M
2:50:03
Rank: #17792 (+166)
30K → 20M
12:00 | 8:50/mi
21M
2:59:31
Rank: #17680 (+112)
20M → 21M
9:28 | 9:28/mi
35K· 21.75 mi
3:05:57
Rank: #17604 (+76)
21M → 35K
6:26 | 8:36/mi
23M
3:17:01
Rank: #17442 (+162)
35K → 23M
11:04 | 8:50/mi
24M
3:25:37
Rank: #17329 (+113)
23M → 24M
8:36 | 8:36/mi
40K· 24.85 mi
3:32:58
Rank: #17194 (+135)
24M → 40K
7:21 | 8:36/mi
25.2M
3:36:11
Rank: #17132 (+62)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:44:50
Rank: #17089 (+43)
25.2M → Finish
8:39 | 8:29/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:50:26
Pace8:25 /mi
2nd Half
Distance13.11 mi
Time1:54:24
Pace8:44 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:4925:458:1725:45
8:17
-
10K
6.21 mi11:45:5451:508:2126:05
8:24
+0:07
15K
9.32 mi12:12:071:18:038:2226:13
8:26
+0:02
20K
12.43 mi12:38:451:44:418:2526:38
8:34
+0:08
Half
13.11 mi12:44:301:50:268:255:45
8:26
-0:08
25K
15.53 mi13:04:572:10:538:2620:27
8:26
0:00
30K
18.64 mi13:32:072:38:038:2927:10
8:45
+0:19
20M
20.00 mi13:44:072:50:038:3012:00
8:50
+0:05
21M
21.00 mi13:53:352:59:318:339:28
9:28
+0:38
35K
21.75 mi14:00:013:05:578:336:26
8:36
-0:52
23M
23.00 mi14:11:053:17:018:3411:04
8:50
+0:14
24M
24.00 mi14:19:413:25:378:348:36
8:36
-0:14
40K
24.85 mi14:27:023:32:588:347:21
8:36
0:00
25.2M
25.20 mi14:30:153:36:118:353:13
9:20
+0:44
Finish
26.22 mi14:38:543:44:508:358:39
8:29
-0:51

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

8:17 /mi

Average Pace

8:35 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:32:09

94% of race

Time at Steady Pace

12:41

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:34 /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 mi11:19:4925:458:1725:45
8:17
#18625
10K
6.21 mi11:45:5451:508:2126:05
8:24
#18860
15K
9.32 mi12:12:071:18:038:2226:13
8:26
#18876
20K
12.43 mi12:38:451:44:418:2526:38
8:34
#18795
Half
13.11 mi12:44:301:50:268:255:45
8:26
#18797
25K
15.53 mi13:04:572:10:538:2620:27
8:26
#18440
30K
18.64 mi13:32:072:38:038:2927:10
8:45
#17958
20M
20.00 mi13:44:072:50:038:3012:00
8:50
#17792
21M
21.00 mi13:53:352:59:318:339:28
9:28
#17680
35K
21.75 mi14:00:013:05:578:336:26
8:36
#17604
23M
23.00 mi14:11:053:17:018:3411:04
8:50
#17442
24M
24.00 mi14:19:413:25:378:348:36
8:36
#17329
40K
24.85 mi14:27:023:32:588:347:21
8:36
#17194
25.2M
25.20 mi14:30:153:36:118:353:13
9:20
#17132
Finish
26.22 mi14:38:543:44:508:358:39
8:29
#17089
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi18625118721187218937(Top 67%)12018(Top 75%)12018(Top 729%)
10K6.21 mi3.10 mi18860-23511979-10711979-10719147(Top 67%)12120(Top 75%)12120(Top 735%)
15K9.32 mi3.11 mi18876-1611982-311982-318937(Top 67%)12018(Top 75%)12018(Top 729%)
20K12.43 mi3.11 mi18795+8111957+2511957+2518672(Top 66%)11887(Top 74%)11887(Top 721%)
Half13.11 mi0.68 mi18797-211953+411953+418686(Top 66%)11895(Top 74%)11895(Top 722%)
25K15.53 mi2.42 mi18440+35711785+16811785+16816768(Top 59%)10996(Top 68%)10996(Top 667%)
30K18.64 mi3.11 mi17958+48211529+25611529+25616255(Top 57%)10601(Top 66%)10601(Top 643%)
20M20.00 mi1.36 mi17792+16611430+9911430+9915834(Top 56%)10306(Top 64%)10306(Top 625%)
21M21.00 mi1.00 mi17680+11211370+6011370+6015919(Top 56%)10214(Top 63%)10214(Top 620%)
35K21.75 mi0.75 mi17604+7611312+5811312+5816040(Top 56%)10192(Top 63%)10192(Top 618%)
23M23.00 mi1.25 mi17442+16211199+11311199+11315316(Top 54%)9778(Top 61%)9778(Top 593%)
24M24.00 mi1.00 mi17329+11311129+7011129+7015149(Top 53%)9651(Top 60%)9651(Top 586%)
40K24.85 mi0.85 mi17194+13511048+8111048+8114025(Top 49%)9017(Top 56%)9017(Top 547%)
25.2M25.20 mi0.35 mi17132+6211012+3611012+3613586(Top 48%)8756(Top 54%)8756(Top 531%)
Finish26.22 mi1.02 mi17089+4310977+3510977+3516128(Top 57%)9994(Top 62%)9994(Top 606%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21stories
+97ft-345ft

Overall

18937

Males

12018

M55-59

12018

5K→10K

3.1 - 6.2 mi

Top 67%
×5stories
+79ft-138ft

Overall

19147

Males

12120

M55-59

12120

10K→15K

6.2 - 9.3 mi

Top 67%
×3stories
+67ft-78ft

Overall

18937

Males

12018

M55-59

12018

15K→20K

9.3 - 12.4 mi

Top 66%
×5stories
+106ft-86ft

Overall

18672

Males

11887

M55-59

11887

20K→Half

12.4 - 13.1 mi

Top 66%
×2stories
+19ft-37ft

Overall

18686

Males

11895

M55-59

11895

Half→25K

13.1 - 15.5 mi

Top 59%
×4stories
+66ft-88ft

Overall

16768

Males

10996

M55-59

10996

25K→30K

15.5 - 18.6 mi

Top 57%
×9stories
+181ft-148ft

Overall

16255

Males

10601

M55-59

10601

30K→20M

18.6 - 20.0 mi

Top 56%
×5stories
+64ft-50ft

Overall

15834

Males

10306

M55-59

10306

20M→21M

20.0 - 21.0 mi

Top 56%
×8stories
+106ft-24ft

Overall

15919

Males

10214

M55-59

10214

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

16040

Males

10192

M55-59

10192

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

15316

Males

9778

M55-59

9778

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

15149

Males

9651

M55-59

9651

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

14025

Males

9017

M55-59

9017

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13586

Males

8756

M55-59

8756

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2stories
+22ft-21ft

Overall

16128

Males

9994

M55-59

9994

Passing Analysis

Category:
Athletes Passed
2627
Passed By
1091
Net Change
+1536
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18625
5K → 10K172407-235#18625#18860
10K → 15K192208-16#18860#18876
15K → 20K235154+81#18876#18795
20K → Half3335-2#18795#18797
Half → 25K37215+357#18797#18440
25K → 30K51937+482#18440#17958
30K → 20M20842+166#17958#17792
20M → 21M15442+112#17792#17680
21M → 35K10024+76#17680#17604
35K → 23M19432+162#17604#17442
23M → 24M14431+113#17442#17329
24M → 40K1449+135#17329#17194
40K → 25.2M719+62#17194#17132
25.2M → Finish8946+43#17132#17089
TOTALS26271091+1536
📊

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