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BOSTON MARATHON 2025

John Flaherty

Bib: 31303•M

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:47
Rank: #22178
Start → 5K
8:57/mi
27:47 split
10K· 6.21 mi
56:19
Rank: #22677 (-499)
5K → 10K
9:11/mi
28:32 split
15K· 9.32 mi
1:24:15
Rank: #22439 (+238)
10K → 15K
8:59/mi
27:56 split
20K· 12.43 mi
1:53:35
Rank: #22520 (-81)
15K → 20K
9:26/mi
29:20 split
Half· 13.11 mi
1:59:59
Rank: #22588 (-68)
20K → Half
9:23/mi
6:24 split
25K· 15.53 mi
2:24:20
Rank: #22755 (-167)
Half → 25K
10:03/mi
24:21 split
30K· 18.64 mi
2:58:10
Rank: #22977 (-222)
25K → 30K
10:53/mi
33:50 split
20M
3:12:46
Rank: #22961 (+16)
30K → 20M
10:45/mi
14:36 split
21M
3:24:10
Rank: #22932 (+29)
20M → 21M
11:24/mi
11:24 split
35K· 21.75 mi
3:34:51
Rank: #23302 (-370)
21M → 35K
14:17/mi
10:41 split
23M
3:49:57
Rank: #23465 (-163)
35K → 23M
12:04/mi
15:06 split
24M
4:01:00
Rank: #23483 (-18)
23M → 24M
11:03/mi
11:03 split
40K· 24.85 mi
4:10:40
Rank: #23529 (-46)
24M → 40K
11:18/mi
9:40 split
25.2M
4:14:25
Rank: #23465 (+64)
40K → 25.2M
10:52/mi
3:45 split
Finish· 26.22 mi
4:25:16
Rank: #23519 (-54)
25.2M → Finish
10:39/mi
10:51 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:59
Pace9:09 /mi
2nd Half
Distance13.11 mi
Time2:25:17
Pace11:05 /mi
📊Positive Split: 21.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:3027:478:5727:47
8:57
-
10K
6.21 mi12:22:0256:199:0428:32
9:11
+0:14
15K
9.32 mi12:49:581:24:159:0227:56
8:59
-0:12
20K
12.43 mi13:19:181:53:359:0829:20
9:26
+0:27
Half
13.11 mi13:25:421:59:599:096:24
9:23
-0:03
25K
15.53 mi13:50:032:24:209:1724:21
10:03
+0:40
30K
18.64 mi14:23:532:58:109:3333:50
10:53
+0:50
20M
20.00 mi14:38:293:12:469:3814:36
10:45
-0:08
21M
21.00 mi14:49:533:24:109:4311:24
11:24
+0:39
35K
21.75 mi15:00:343:34:519:5310:41
14:17
+2:53
23M
23.00 mi15:15:403:49:5710:0015:06
12:04
-2:13
24M
24.00 mi15:26:434:01:0010:0311:03
11:03
-1:01
40K
24.85 mi15:36:234:10:4010:059:40
11:18
+0:15
25.2M
25.20 mi15:40:084:14:2510:063:45
10:52
-0:26
Finish
26.22 mi15:50:594:25:1610:0710:51
10:39
-0:13

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

8:57 /mi

Average Pace

10:07 /mi

Slowest Pace

14:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:24:20

54% of race

Time at Steady Pace

1:35:09

36% of race

Time at Slower Pace

25:47

10% of race

Average Pace: 10:07 /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 mi11:53:3027:478:5727:47
8:57
#22178
10K
6.21 mi12:22:0256:199:0428:32
9:11
#22677
15K
9.32 mi12:49:581:24:159:0227:56
8:59
#22439
20K
12.43 mi13:19:181:53:359:0829:20
9:26
#22520
Half
13.11 mi13:25:421:59:599:096:24
9:23
#22588
25K
15.53 mi13:50:032:24:209:1724:21
10:03
#22755
30K
18.64 mi14:23:532:58:109:3333:50
10:53
#22977
20M
20.00 mi14:38:293:12:469:3814:36
10:45
#22961
21M
21.00 mi14:49:533:24:109:4311:24
11:24
#22932
35K
21.75 mi15:00:343:34:519:5310:41
14:17
#23302
23M
23.00 mi15:15:403:49:5710:0015:06
12:04
#23465
24M
24.00 mi15:26:434:01:0010:0311:03
11:03
#23483
40K
24.85 mi15:36:234:10:4010:059:40
11:18
#23529
25.2M
25.20 mi15:40:084:14:2510:063:45
10:52
#23465
Finish
26.22 mi15:50:594:25:1610:0710:51
10:39
#23519
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi22178133941339421985(Top 77%)13384(Top 83%)13384(Top 237%)
10K6.21 mi3.10 mi22677-49913639-24513639-24523133(Top 81%)13865(Top 86%)13865(Top 246%)
15K9.32 mi3.11 mi22439+23813551+8813551+8821985(Top 77%)13384(Top 83%)13384(Top 237%)
20K12.43 mi3.11 mi22520-8113585-3413585-3422717(Top 80%)13674(Top 85%)13674(Top 242%)
Half13.11 mi0.68 mi22588-6813626-4113626-4123183(Top 82%)13874(Top 86%)13874(Top 246%)
25K15.53 mi2.42 mi22755-16713687-6113687-6123365(Top 82%)13903(Top 86%)13903(Top 246%)
30K18.64 mi3.11 mi22977-22213742-5513742-5523792(Top 84%)13974(Top 87%)13974(Top 248%)
20M20.00 mi1.36 mi22961+1613711+3113711+3123052(Top 81%)13547(Top 84%)13547(Top 240%)
21M21.00 mi1.00 mi22932+2913678+3313678+3322394(Top 79%)13150(Top 82%)13150(Top 233%)
35K21.75 mi0.75 mi23302-37013838-16013838-16027818(Top 98%)15733(Top 98%)15733(Top 279%)
23M23.00 mi1.25 mi23465-16313893-5513893-5525203(Top 89%)14432(Top 90%)14432(Top 256%)
24M24.00 mi1.00 mi23483-18138931389324090(Top 85%)13870(Top 86%)13870(Top 246%)
40K24.85 mi0.85 mi23529-4613892+113892+123769(Top 84%)13647(Top 85%)13647(Top 242%)
25.2M25.20 mi0.35 mi23465+6413852+4013852+4020253(Top 71%)11922(Top 74%)11922(Top 211%)
Finish26.22 mi1.02 mi23519-5413860-813860-824611(Top 87%)14088(Top 87%)14088(Top 250%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 77%
×21story building
+97ft-345ft

Overall

21985

Males

13384

M18-39

13384

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

23133

Males

13865

M18-39

13865

10K→15K

6.2 - 9.3 mi

Top 77%
×3story building
+67ft-78ft

Overall

21985

Males

13384

M18-39

13384

15K→20K

9.3 - 12.4 mi

Top 80%
×5story building
+106ft-86ft

Overall

22717

Males

13674

M18-39

13674

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23183

Males

13874

M18-39

13874

Half→25K

13.1 - 15.5 mi

Top 82%
×4story building
+66ft-88ft

Overall

23365

Males

13903

M18-39

13903

25K→30K

15.5 - 18.6 mi

Top 84%
×9story building
+181ft-148ft

Overall

23792

Males

13974

M18-39

13974

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

23052

Males

13547

M18-39

13547

20M→21M

20.0 - 21.0 mi

Top 79%
×8story building
+106ft-24ft

Overall

22394

Males

13150

M18-39

13150

21M→35K

21.0 - 21.8 mi

Top 98%
×7story building
+17ft-86ft

Overall

27818

Males

15733

M18-39

15733

35K→23M

21.8 - 23.0 mi

Top 89%
×5story building
+23ft-63ft

Overall

25203

Males

14432

M18-39

14432

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

24090

Males

13870

M18-39

13870

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

23769

Males

13647

M18-39

13647

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

20253

Males

11922

M18-39

11922

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

24611

Males

14088

M18-39

14088

Passing Analysis

Category:
Athletes Passed
1131
Passed By
2472
Net Change
-1341
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22178
5K → 10K101600-499#22178#22677
10K → 15K31779+238#22677#22439
15K → 20K141222-81#22439#22520
20K → Half2189-68#22520#22588
Half → 25K97264-167#22588#22755
25K → 30K90312-222#22755#22977
30K → 20M8771+16#22977#22961
20M → 21M8152+29#22961#22932
21M → 35K5375-370#22932#23302
35K → 23M30193-163#23302#23465
23M → 24M3553-18#23465#23483
24M → 40K2975-46#23483#23529
40K → 25.2M684+64#23529#23465
25.2M → Finish2983-54#23465#23519
TOTALS11312472-1341
📊

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