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BOSTON MARATHON 2025

John Jantz

Bib: 612•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 1%
Gender (Male)
#0 / 16105
Top 2%
Division (M18-39)
#0 / 5642
Top 4%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
16:47
Rank: #123
Start → 5K
16:47 | 5:24/mi
10K· 6.21 mi
33:38
Rank: #141 (-18)
5K → 10K
16:51 | 5:25/mi
15K· 9.32 mi
50:48
Rank: #143 (-2)
10K → 15K
17:10 | 5:32/mi
20K· 12.43 mi
1:07:57
Rank: #138 (+5)
15K → 20K
17:09 | 5:31/mi
Half· 13.11 mi
1:11:43
Rank: #137 (+1)
20K → Half
3:46 | 5:31/mi
25K· 15.53 mi
1:25:22
Rank: #149 (-12)
Half → 25K
13:39 | 5:38/mi
30K· 18.64 mi
1:43:24
Rank: #156 (-7)
25K → 30K
18:02 | 5:48/mi
20M
1:51:32
Rank: #167 (-11)
30K → 20M
8:08 | 5:59/mi
21M
1:58:01
Rank: #175 (-8)
20M → 21M
6:29 | 6:29/mi
35K· 21.75 mi
2:02:34
Rank: #178 (-3)
21M → 35K
4:33 | 6:05/mi
23M
2:10:45
Rank: #194 (-16)
35K → 23M
8:11 | 6:32/mi
24M
2:17:15
Rank: #230 (-36)
23M → 24M
6:30 | 6:30/mi
40K· 24.85 mi
2:22:58
Rank: #248 (-18)
24M → 40K
5:43 | 6:41/mi
25.2M
2:25:32
Rank: #258 (-10)
40K → 25.2M
2:34 | 7:27/mi
Finish· 26.22 mi
2:32:30
Rank: #295 (-37)
25.2M → Finish
6:58 | 6:50/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:11:43
Pace5:28 /mi
2nd Half
Distance13.11 mi
Time1:20:47
Pace6:10 /mi
📊Positive Split: 12.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:16:5816:475:2416:47
5:24
-
10K
6.21 mi10:33:4933:385:2516:51
5:25
+0:01
15K
9.32 mi10:50:5950:485:2717:10
5:32
+0:07
20K
12.43 mi11:08:081:07:575:2817:09
5:31
-0:01
Half
13.11 mi11:11:541:11:435:283:46
5:31
0:00
25K
15.53 mi11:25:331:25:225:3013:39
5:38
+0:07
30K
18.64 mi11:43:351:43:245:3318:02
5:48
+0:10
20M
20.00 mi11:51:431:51:325:358:08
5:59
+0:11
21M
21.00 mi11:58:121:58:015:376:29
6:29
+0:30
35K
21.75 mi12:02:452:02:345:384:33
6:05
-0:24
23M
23.00 mi12:10:562:10:455:418:11
6:32
+0:27
24M
24.00 mi12:17:262:17:155:436:30
6:30
-0:02
40K
24.85 mi12:23:092:22:585:455:43
6:41
+0:11
25.2M
25.20 mi12:25:432:25:325:472:34
7:27
+0:46
Finish
26.22 mi12:32:412:32:305:496:58
6:50
-0:37

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

5:24 /mi

Average Pace

5:49 /mi

Slowest Pace

7:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:22

56% of race

Time at Steady Pace

30:43

20% of race

Time at Slower Pace

36:25

24% of race

Average Pace: 5:49 /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 mi10:16:5816:475:2416:47
5:24
#123
10K
6.21 mi10:33:4933:385:2516:51
5:25
#141
15K
9.32 mi10:50:5950:485:2717:10
5:32
#143
20K
12.43 mi11:08:081:07:575:2817:09
5:31
#138
Half
13.11 mi11:11:541:11:435:283:46
5:31
#137
25K
15.53 mi11:25:331:25:225:3013:39
5:38
#149
30K
18.64 mi11:43:351:43:245:3318:02
5:48
#156
20M
20.00 mi11:51:431:51:325:358:08
5:59
#167
21M
21.00 mi11:58:121:58:015:376:29
6:29
#175
35K
21.75 mi12:02:452:02:345:384:33
6:05
#178
23M
23.00 mi12:10:562:10:455:418:11
6:32
#194
24M
24.00 mi12:17:262:17:155:436:30
6:30
#230
40K
24.85 mi12:23:092:22:585:455:43
6:41
#248
25.2M
25.20 mi12:25:432:25:325:472:34
7:27
#258
Finish
26.22 mi12:32:412:32:305:496:58
6:50
#295
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi123122122177(Top 0.6%)152(Top 0.9%)152(Top 3%)
10K6.21 mi3.10 mi141-18120+2120+2144(Top 0.5%)120(Top 0.7%)120(Top 2%)
15K9.32 mi3.11 mi143-2121-1121-1177(Top 0.6%)152(Top 0.9%)152(Top 3%)
20K12.43 mi3.11 mi138+5117+4117+4142(Top 0.5%)121(Top 0.8%)121(Top 2%)
Half13.11 mi0.68 mi137+1115+2115+2214(Top 0.8%)192(Top 1%)192(Top 3%)
25K15.53 mi2.42 mi149-12126-11126-11221(Top 0.8%)197(Top 1%)197(Top 3%)
30K18.64 mi3.11 mi156-7133-7133-7252(Top 0.9%)230(Top 1%)230(Top 4%)
20M20.00 mi1.36 mi167-11146-13146-13359(Top 1%)335(Top 2%)335(Top 6%)
21M21.00 mi1.00 mi175-8154-8154-8635(Top 2%)599(Top 4%)599(Top 11%)
35K21.75 mi0.75 mi178-3156-2156-2880(Top 3%)825(Top 5%)825(Top 15%)
23M23.00 mi1.25 mi194-16172-16172-161561(Top 5%)1459(Top 9%)1459(Top 26%)
24M24.00 mi1.00 mi230-36208-36208-362013(Top 7%)1866(Top 12%)1866(Top 33%)
40K24.85 mi0.85 mi248-18226-18226-182274(Top 8%)2079(Top 13%)2079(Top 37%)
25.2M25.20 mi0.35 mi258-10234-8234-83048(Top 11%)2689(Top 17%)2689(Top 48%)
Finish26.22 mi1.02 mi295-37269-35269-354666(Top 16%)3890(Top 24%)3890(Top 69%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.6%
×21stories
+97ft-345ft

Overall

177

Males

152

M18-39

152

5K→10K

3.1 - 6.2 mi

Top 0.5%
×5stories
+79ft-138ft

Overall

144

Males

120

M18-39

120

10K→15K

6.2 - 9.3 mi

Top 0.6%
×3stories
+67ft-78ft

Overall

177

Males

152

M18-39

152

15K→20K

9.3 - 12.4 mi

Top 0.5%
×5stories
+106ft-86ft

Overall

142

Males

121

M18-39

121

20K→Half

12.4 - 13.1 mi

Top 0.8%
×2stories
+19ft-37ft

Overall

214

Males

192

M18-39

192

Half→25K

13.1 - 15.5 mi

Top 0.8%
×4stories
+66ft-88ft

Overall

221

Males

197

M18-39

197

25K→30K

15.5 - 18.6 mi

Top 0.9%
×9stories
+181ft-148ft

Overall

252

Males

230

M18-39

230

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

359

Males

335

M18-39

335

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

635

Males

599

M18-39

599

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

880

Males

825

M18-39

825

35K→23M

21.8 - 23.0 mi

Top 5%
×5stories
+23ft-63ft

Overall

1561

Males

1459

M18-39

1459

23M→24M

23.0 - 24.0 mi

Top 7%
×6stories
+12ft-82ft

Overall

2013

Males

1866

M18-39

1866

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2274

Males

2079

M18-39

2079

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

3048

Males

2689

M18-39

2689

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2stories
+22ft-21ft

Overall

4666

Males

3890

M18-39

3890

Passing Analysis

Category:
Athletes Passed
48
Passed By
220
Net Change
-172
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#123
5K → 10K927-18#123#141
10K → 15K810-2#141#143
15K → 20K127+5#143#138
20K → Half32+1#138#137
Half → 25K113-12#137#149
25K → 30K512-7#149#156
30K → 20M213-11#156#167
20M → 21M210-8#167#175
21M → 35K25-3#175#178
35K → 23M218-16#178#194
23M → 24M137-36#194#230
24M → 40K119-18#230#248
40K → 25.2M010-10#248#258
25.2M → Finish037-37#258#295
TOTALS48220-172
📊

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