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BOSTON MARATHON 2025

Jonathan Byrne

Bib: 8543•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:54
Rank: #5706
Start → 5K
20:54 | 6:44/mi
10K· 6.21 mi
43:01
Rank: #7323 (-1617)
5K → 10K
22:07 | 7:07/mi
15K· 9.32 mi
1:06:19
Rank: #8614 (-1291)
10K → 15K
23:18 | 7:30/mi
20K· 12.43 mi
1:31:50
Rank: #10661 (-2047)
15K → 20K
25:31 | 8:13/mi
Half· 13.11 mi
1:37:18
Rank: #10950 (-289)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
1:58:33
Rank: #12450 (-1500)
Half → 25K
21:15 | 8:46/mi
30K· 18.64 mi
2:28:26
Rank: #14390 (-1940)
25K → 30K
29:53 | 9:37/mi
20M
2:43:36
Rank: #15701 (-1311)
30K → 20M
15:10 | 11:10/mi
21M
2:55:20
Rank: #16377 (-676)
20M → 21M
11:44 | 11:44/mi
35K· 21.75 mi
3:03:23
Rank: #16819 (-442)
21M → 35K
8:03 | 10:46/mi
23M
3:17:29
Rank: #17575 (-756)
35K → 23M
14:06 | 11:16/mi
24M
3:28:16
Rank: #18006 (-431)
23M → 24M
10:47 | 10:47/mi
40K· 24.85 mi
3:37:05
Rank: #18211 (-205)
24M → 40K
8:49 | 10:19/mi
25.2M
3:41:03
Rank: #18328 (-117)
40K → 25.2M
3:58 | 11:30/mi
Finish· 26.22 mi
3:51:29
Rank: #18637 (-309)
25.2M → Finish
10:26 | 10:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:18
Pace7:25 /mi
2nd Half
Distance13.11 mi
Time2:14:11
Pace10:14 /mi
📊Positive Split: 37.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:0920:546:4420:54
6:44
-
10K
6.21 mi11:08:1643:016:5522:07
7:07
+0:23
15K
9.32 mi11:31:341:06:197:0723:18
7:30
+0:23
20K
12.43 mi11:57:051:31:507:2325:31
8:13
+0:43
Half
13.11 mi12:02:331:37:187:255:28
8:01
-0:12
25K
15.53 mi12:23:481:58:337:3821:15
8:46
+0:45
30K
18.64 mi12:53:412:28:267:5829:53
9:37
+0:51
20M
20.00 mi13:08:512:43:368:1115:10
11:10
+1:33
21M
21.00 mi13:20:352:55:208:2111:44
11:44
+0:34
35K
21.75 mi13:28:383:03:238:268:03
10:46
-0:58
23M
23.00 mi13:42:443:17:298:3514:06
11:16
+0:30
24M
24.00 mi13:53:313:28:168:4110:47
10:47
-0:29
40K
24.85 mi14:02:203:37:058:448:49
10:19
-0:28
25.2M
25.20 mi14:06:183:41:038:463:58
11:30
+1:11
Finish
26.22 mi14:16:443:51:298:5010:26
10:14
-1:16

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

6:44 /mi

Average Pace

8:50 /mi

Slowest Pace

11:44 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:33

51% of race

Time at Steady Pace

1:07:58

29% of race

Time at Slower Pace

44:58

19% of race

Average Pace: 8:50 /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 mi10:46:0920:546:4420:54
6:44
#5706
10K
6.21 mi11:08:1643:016:5522:07
7:07
#7323
15K
9.32 mi11:31:341:06:197:0723:18
7:30
#8614
20K
12.43 mi11:57:051:31:507:2325:31
8:13
#10661
Half
13.11 mi12:02:331:37:187:255:28
8:01
#10950
25K
15.53 mi12:23:481:58:337:3821:15
8:46
#12450
30K
18.64 mi12:53:412:28:267:5829:53
9:37
#14390
20M
20.00 mi13:08:512:43:368:1115:10
11:10
#15701
21M
21.00 mi13:20:352:55:208:2111:44
11:44
#16377
35K
21.75 mi13:28:383:03:238:268:03
10:46
#16819
23M
23.00 mi13:42:443:17:298:3514:06
11:16
#17575
24M
24.00 mi13:53:313:28:168:4110:47
10:47
#18006
40K
24.85 mi14:02:203:37:058:448:49
10:19
#18211
25.2M
25.20 mi14:06:183:41:038:463:58
11:30
#18328
Finish
26.22 mi14:16:443:51:298:5010:26
10:14
#18637
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi57065273527311764(Top 41%)8958(Top 56%)8958(Top 399%)
10K6.21 mi3.10 mi7323-16176534-12616534-12618836(Top 31%)7504(Top 47%)7504(Top 334%)
15K9.32 mi3.11 mi8614-12917355-8217355-82111764(Top 41%)8958(Top 56%)8958(Top 399%)
20K12.43 mi3.11 mi10661-20478453-10988453-109816377(Top 58%)10911(Top 68%)10911(Top 486%)
Half13.11 mi0.68 mi10950-2898604-1518604-15115977(Top 56%)10780(Top 67%)10780(Top 480%)
25K15.53 mi2.42 mi12450-15009253-6499253-64918740(Top 66%)11853(Top 74%)11853(Top 528%)
30K18.64 mi3.11 mi14390-194010020-76710020-76720417(Top 72%)12478(Top 77%)12478(Top 555%)
20M20.00 mi1.36 mi15701-131110559-53910559-53923897(Top 84%)13932(Top 87%)13932(Top 620%)
21M21.00 mi1.00 mi16377-67610817-25810817-25823078(Top 81%)13484(Top 84%)13484(Top 600%)
35K21.75 mi0.75 mi16819-44210991-17410991-17423699(Top 83%)13736(Top 85%)13736(Top 611%)
23M23.00 mi1.25 mi17575-75611258-26711258-26723798(Top 84%)13732(Top 85%)13732(Top 611%)
24M24.00 mi1.00 mi18006-43111435-17711435-17723518(Top 83%)13571(Top 84%)13571(Top 604%)
40K24.85 mi0.85 mi18211-20511501-6611501-6621395(Top 75%)12467(Top 77%)12467(Top 555%)
25.2M25.20 mi0.35 mi18328-11711532-3111532-3122008(Top 77%)12783(Top 79%)12783(Top 569%)
Finish26.22 mi1.02 mi18637-30911663-13111663-13123623(Top 83%)13575(Top 84%)13575(Top 604%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21stories
+97ft-345ft

Overall

11764

Males

8958

M40-44

8958

5K→10K

3.1 - 6.2 mi

Top 31%
×5stories
+79ft-138ft

Overall

8836

Males

7504

M40-44

7504

10K→15K

6.2 - 9.3 mi

Top 41%
×3stories
+67ft-78ft

Overall

11764

Males

8958

M40-44

8958

15K→20K

9.3 - 12.4 mi

Top 58%
×5stories
+106ft-86ft

Overall

16377

Males

10911

M40-44

10911

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

15977

Males

10780

M40-44

10780

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

18740

Males

11853

M40-44

11853

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

20417

Males

12478

M40-44

12478

30K→20M

18.6 - 20.0 mi

Top 84%
×5stories
+64ft-50ft

Overall

23897

Males

13932

M40-44

13932

20M→21M

20.0 - 21.0 mi

Top 81%
×8stories
+106ft-24ft

Overall

23078

Males

13484

M40-44

13484

21M→35K

21.0 - 21.8 mi

Top 83%
×7stories
+17ft-86ft

Overall

23699

Males

13736

M40-44

13736

35K→23M

21.8 - 23.0 mi

Top 84%
×5stories
+23ft-63ft

Overall

23798

Males

13732

M40-44

13732

23M→24M

23.0 - 24.0 mi

Top 83%
×6stories
+12ft-82ft

Overall

23518

Males

13571

M40-44

13571

24M→40K

24.0 - 24.9 mi

Top 75%
×1story
+6ft-20ft

Overall

21395

Males

12467

M40-44

12467

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

22008

Males

12783

M40-44

12783

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2stories
+22ft-21ft

Overall

23623

Males

13575

M40-44

13575

Passing Analysis

Category:
Athletes Passed
207
Passed By
13136
Net Change
-12931
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5706
5K → 10K121629-1617#5706#7323
10K → 15K131304-1291#7323#8614
15K → 20K92054-2047#8614#10661
20K → Half3292-289#10661#10950
Half → 25K171517-1500#10950#12450
25K → 30K321972-1940#12450#14390
30K → 20M111322-1311#14390#15701
20M → 21M12688-676#15701#16377
21M → 35K11453-442#16377#16819
35K → 23M19775-756#16819#17575
23M → 24M23454-431#17575#18006
24M → 40K27232-205#18006#18211
40K → 25.2M7124-117#18211#18328
25.2M → Finish11320-309#18328#18637
TOTALS20713136-12931
📊

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