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BOSTON MARATHON 2025

Isaac Johnson

Bib: 6556•M

MI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 19%
Division (M18-39)
#0 / 5642
Top 42%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:58
Rank: #5881
Start → 5K
20:58 | 6:45/mi
10K· 6.21 mi
41:52
Rank: #5728 (+153)
5K → 10K
20:54 | 6:44/mi
15K· 9.32 mi
1:02:38
Rank: #5440 (+288)
10K → 15K
20:46 | 6:41/mi
20K· 12.43 mi
1:23:18
Rank: #5020 (+420)
15K → 20K
20:40 | 6:39/mi
Half· 13.11 mi
1:27:48
Rank: #4974 (+46)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:43:53
Rank: #4685 (+289)
Half → 25K
16:05 | 6:38/mi
30K· 18.64 mi
2:05:11
Rank: #4439 (+246)
25K → 30K
21:18 | 6:51/mi
20M
2:14:23
Rank: #4253 (+186)
30K → 20M
9:12 | 6:46/mi
21M
2:21:25
Rank: #4098 (+155)
20M → 21M
7:02 | 7:02/mi
35K· 21.75 mi
2:26:15
Rank: #3991 (+107)
21M → 35K
4:50 | 6:28/mi
23M
2:34:39
Rank: #3836 (+155)
35K → 23M
8:24 | 6:43/mi
24M
2:41:03
Rank: #3692 (+144)
23M → 24M
6:24 | 6:24/mi
40K· 24.85 mi
2:46:34
Rank: #3526 (+166)
24M → 40K
5:31 | 6:27/mi
25.2M
2:48:58
Rank: #3452 (+74)
40K → 25.2M
2:24 | 6:58/mi
Finish· 26.22 mi
2:55:14
Rank: #3297 (+155)
25.2M → Finish
6:16 | 6:09/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:27:48
Pace6:42 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:27:26
Pace6:40 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:3320:586:4520:58
6:45
-
10K
6.21 mi10:48:2741:526:4420:54
6:44
-0:01
15K
9.32 mi11:09:131:02:386:4320:46
6:41
-0:03
20K
12.43 mi11:29:531:23:186:4220:40
6:39
-0:02
Half
13.11 mi11:34:231:27:486:424:30
6:36
-0:03
25K
15.53 mi11:50:281:43:536:4116:05
6:38
+0:02
30K
18.64 mi12:11:462:05:116:4321:18
6:51
+0:13
20M
20.00 mi12:20:582:14:236:439:12
6:46
-0:05
21M
21.00 mi12:28:002:21:256:447:02
7:02
+0:16
35K
21.75 mi12:32:502:26:156:434:50
6:28
-0:34
23M
23.00 mi12:41:142:34:396:438:24
6:43
+0:15
24M
24.00 mi12:47:382:41:036:436:24
6:24
-0:19
40K
24.85 mi12:53:092:46:346:425:31
6:27
+0:03
25.2M
25.20 mi12:55:332:48:586:422:24
6:58
+0:31
Finish
26.22 mi13:01:492:55:146:416:16
6:09
-0:49

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

6:09 /mi

Average Pace

6:41 /mi

Slowest Pace

7:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:18

77% of race

Time at Steady Pace

39:56

23% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:41 /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 mi10:27:3320:586:4520:58
6:45
#5881
10K
6.21 mi10:48:2741:526:4420:54
6:44
#5728
15K
9.32 mi11:09:131:02:386:4320:46
6:41
#5440
20K
12.43 mi11:29:531:23:186:4220:40
6:39
#5020
Half
13.11 mi11:34:231:27:486:424:30
6:36
#4974
25K
15.53 mi11:50:281:43:536:4116:05
6:38
#4685
30K
18.64 mi12:11:462:05:116:4321:18
6:51
#4439
20M
20.00 mi12:20:582:14:236:439:12
6:46
#4253
21M
21.00 mi12:28:002:21:256:447:02
7:02
#4098
35K
21.75 mi12:32:502:26:156:434:50
6:28
#3991
23M
23.00 mi12:41:142:34:396:438:24
6:43
#3836
24M
24.00 mi12:47:382:41:036:436:24
6:24
#3692
40K
24.85 mi12:53:092:46:346:425:31
6:27
#3526
25.2M
25.20 mi12:55:332:48:586:422:24
6:58
#3452
Finish
26.22 mi13:01:492:55:146:416:16
6:09
#3297
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5881541654164940(Top 17%)4603(Top 29%)4603(Top 82%)
10K6.21 mi3.10 mi5728+1535286+1305286+1305592(Top 20%)5141(Top 32%)5141(Top 91%)
15K9.32 mi3.11 mi5440+2885032+2545032+2544940(Top 17%)4603(Top 29%)4603(Top 82%)
20K12.43 mi3.11 mi5020+4204673+3594673+3594032(Top 14%)3787(Top 24%)3787(Top 67%)
Half13.11 mi0.68 mi4974+464628+454628+454375(Top 15%)4097(Top 25%)4097(Top 73%)
25K15.53 mi2.42 mi4685+2894366+2624366+2623679(Top 13%)3458(Top 21%)3458(Top 61%)
30K18.64 mi3.11 mi4439+2464146+2204146+2203783(Top 13%)3497(Top 22%)3497(Top 62%)
20M20.00 mi1.36 mi4253+1863977+1693977+1692788(Top 10%)2613(Top 16%)2613(Top 46%)
21M21.00 mi1.00 mi4098+1553832+1453832+1452407(Top 8%)2248(Top 14%)2248(Top 40%)
35K21.75 mi0.75 mi3991+1073731+1013731+1012314(Top 8%)2166(Top 13%)2166(Top 38%)
23M23.00 mi1.25 mi3836+1553586+1453586+1452308(Top 8%)2151(Top 13%)2151(Top 38%)
24M24.00 mi1.00 mi3692+1443450+1363450+1361679(Top 6%)1566(Top 10%)1566(Top 28%)
40K24.85 mi0.85 mi3526+1663301+1493301+1491467(Top 5%)1361(Top 8%)1361(Top 24%)
25.2M25.20 mi0.35 mi3452+743232+693232+691413(Top 5%)1300(Top 8%)1300(Top 23%)
Finish26.22 mi1.02 mi3297+1553088+1443088+1441378(Top 5%)1285(Top 8%)1285(Top 23%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21stories
+97ft-345ft

Overall

4940

Males

4603

M18-39

4603

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5592

Males

5141

M18-39

5141

10K→15K

6.2 - 9.3 mi

Top 17%
×3stories
+67ft-78ft

Overall

4940

Males

4603

M18-39

4603

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

4032

Males

3787

M18-39

3787

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4375

Males

4097

M18-39

4097

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3679

Males

3458

M18-39

3458

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3783

Males

3497

M18-39

3497

30K→20M

18.6 - 20.0 mi

Top 10%
×5stories
+64ft-50ft

Overall

2788

Males

2613

M18-39

2613

20M→21M

20.0 - 21.0 mi

Top 8%
×8stories
+106ft-24ft

Overall

2407

Males

2248

M18-39

2248

21M→35K

21.0 - 21.8 mi

Top 8%
×7stories
+17ft-86ft

Overall

2314

Males

2166

M18-39

2166

35K→23M

21.8 - 23.0 mi

Top 8%
×5stories
+23ft-63ft

Overall

2308

Males

2151

M18-39

2151

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1679

Males

1566

M18-39

1566

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1467

Males

1361

M18-39

1361

40K→25.2M

24.9 - 25.2 mi

Top 5%
×1story
+13ft-16ft

Overall

1413

Males

1300

M18-39

1300

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2stories
+22ft-21ft

Overall

1378

Males

1285

M18-39

1285

Passing Analysis

Category:
Athletes Passed
2784
Passed By
200
Net Change
+2584
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5881
5K → 10K262109+153#5881#5728
10K → 15K30719+288#5728#5440
15K → 20K4288+420#5440#5020
20K → Half493+46#5020#4974
Half → 25K2978+289#4974#4685
25K → 30K27731+246#4685#4439
30K → 20M1915+186#4439#4253
20M → 21M1594+155#4253#4098
21M → 35K1081+107#4098#3991
35K → 23M1627+155#3991#3836
23M → 24M1451+144#3836#3692
24M → 40K1671+166#3692#3526
40K → 25.2M751+74#3526#3452
25.2M → Finish1572+155#3452#3297
TOTALS2784200+2584
📊

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