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BOSTON MARATHON 2025

Justin Prenton

Bib: 14976•M

WA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 45%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 48%
Division (M55-59)
#0 / 1648
Top 35%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:28
Rank: #12678
Start → 5K
23:28 | 7:33/mi
10K· 6.21 mi
47:21
Rank: #13208 (-530)
5K → 10K
23:53 | 7:41/mi
15K· 9.32 mi
1:11:23
Rank: #13388 (-180)
10K → 15K
24:02 | 7:44/mi
20K· 12.43 mi
1:35:29
Rank: #13220 (+168)
15K → 20K
24:06 | 7:45/mi
Half· 13.11 mi
1:40:37
Rank: #13145 (+75)
20K → Half
5:08 | 7:31/mi
25K· 15.53 mi
1:59:42
Rank: #13063 (+82)
Half → 25K
19:05 | 7:52/mi
30K· 18.64 mi
2:25:21
Rank: #13051 (+12)
25K → 30K
25:39 | 8:15/mi
20M
2:36:44
Rank: #13026 (+25)
30K → 20M
11:23 | 8:23/mi
21M
2:45:32
Rank: #12947 (+79)
20M → 21M
8:48 | 8:48/mi
35K· 21.75 mi
2:51:33
Rank: #12927 (+20)
21M → 35K
6:01 | 8:03/mi
23M
3:01:57
Rank: #12831 (+96)
35K → 23M
10:24 | 8:18/mi
24M
3:10:11
Rank: #12833 (-2)
23M → 24M
8:14 | 8:14/mi
40K· 24.85 mi
3:17:16
Rank: #12796 (+37)
24M → 40K
7:05 | 8:17/mi
25.2M
3:20:21
Rank: #12756 (+40)
40K → 25.2M
3:05 | 8:56/mi
Finish· 26.22 mi
3:28:44
Rank: #12821 (-65)
25.2M → Finish
8:23 | 8:14/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:37
Pace7:40 /mi
2nd Half
Distance13.11 mi
Time1:48:07
Pace8:15 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:0223:287:3323:28
7:33
-
10K
6.21 mi11:17:5547:217:3723:53
7:41
+0:08
15K
9.32 mi11:41:571:11:237:4024:02
7:44
+0:03
20K
12.43 mi12:06:031:35:297:4124:06
7:45
+0:01
Half
13.11 mi12:11:111:40:377:405:08
7:31
-0:14
25K
15.53 mi12:30:161:59:427:4219:05
7:52
+0:21
30K
18.64 mi12:55:552:25:217:4825:39
8:15
+0:23
20M
20.00 mi13:07:182:36:447:5011:23
8:23
+0:08
21M
21.00 mi13:16:062:45:327:538:48
8:48
+0:25
35K
21.75 mi13:22:072:51:337:536:01
8:03
-0:45
23M
23.00 mi13:32:313:01:577:5510:24
8:18
+0:15
24M
24.00 mi13:40:453:10:117:558:14
8:14
-0:04
40K
24.85 mi13:47:503:17:167:567:05
8:17
+0:03
25.2M
25.20 mi13:50:553:20:217:573:05
8:56
+0:39
Finish
26.22 mi13:59:183:28:447:588:23
8:14
-0:42

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

7:31 /mi

Average Pace

7:58 /mi

Slowest Pace

8:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:59

80% of race

Time at Steady Pace

37:40

18% of race

Time at Slower Pace

3:05

1% of race

Average Pace: 7:58 /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 mi10:54:0223:287:3323:28
7:33
#12678
10K
6.21 mi11:17:5547:217:3723:53
7:41
#13208
15K
9.32 mi11:41:571:11:237:4024:02
7:44
#13388
20K
12.43 mi12:06:031:35:297:4124:06
7:45
#13220
Half
13.11 mi12:11:111:40:377:405:08
7:31
#13145
25K
15.53 mi12:30:161:59:427:4219:05
7:52
#13063
30K
18.64 mi12:55:552:25:217:4825:39
8:15
#13051
20M
20.00 mi13:07:182:36:447:5011:23
8:23
#13026
21M
21.00 mi13:16:062:45:327:538:48
8:48
#12947
35K
21.75 mi13:22:072:51:337:536:01
8:03
#12927
23M
23.00 mi13:32:313:01:577:5510:24
8:18
#12831
24M
24.00 mi13:40:453:10:117:558:14
8:14
#12833
40K
24.85 mi13:47:503:17:167:567:05
8:17
#12796
25.2M
25.20 mi13:50:553:20:217:573:05
8:56
#12756
Finish
26.22 mi13:59:183:28:447:588:23
8:14
#12821
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi126789497949713811(Top 49%)9862(Top 61%)9862(Top 598%)
10K6.21 mi3.10 mi13208-5309704-2079704-20713748(Top 48%)9898(Top 61%)9898(Top 601%)
15K9.32 mi3.11 mi13388-1809728-249728-2413811(Top 49%)9862(Top 61%)9862(Top 598%)
20K12.43 mi3.11 mi13220+1689617+1119617+11112900(Top 45%)9374(Top 58%)9374(Top 569%)
Half13.11 mi0.68 mi13145+759582+359582+3511882(Top 42%)8990(Top 56%)8990(Top 546%)
25K15.53 mi2.42 mi13063+829517+659517+6512902(Top 45%)9249(Top 57%)9249(Top 561%)
30K18.64 mi3.11 mi13051+129435+829435+8213193(Top 46%)9219(Top 57%)9219(Top 559%)
20M20.00 mi1.36 mi13026+259395+409395+4012976(Top 46%)8978(Top 56%)8978(Top 545%)
21M21.00 mi1.00 mi12947+799332+639332+6312277(Top 43%)8502(Top 53%)8502(Top 516%)
35K21.75 mi0.75 mi12927+209308+249308+2412509(Top 44%)8570(Top 53%)8570(Top 520%)
23M23.00 mi1.25 mi12831+969228+809228+8012065(Top 42%)8265(Top 51%)8265(Top 502%)
24M24.00 mi1.00 mi12833-29192+369192+3612782(Top 45%)8545(Top 53%)8545(Top 519%)
40K24.85 mi0.85 mi12796+379142+509142+5012055(Top 42%)8088(Top 50%)8088(Top 491%)
25.2M25.20 mi0.35 mi12756+409119+239119+2311436(Top 40%)7696(Top 48%)7696(Top 467%)
Finish26.22 mi1.02 mi12821-659123-49123-414424(Top 51%)9218(Top 57%)9218(Top 559%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21stories
+97ft-345ft

Overall

13811

Males

9862

M55-59

9862

5K→10K

3.1 - 6.2 mi

Top 48%
×5stories
+79ft-138ft

Overall

13748

Males

9898

M55-59

9898

10K→15K

6.2 - 9.3 mi

Top 49%
×3stories
+67ft-78ft

Overall

13811

Males

9862

M55-59

9862

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

12900

Males

9374

M55-59

9374

20K→Half

12.4 - 13.1 mi

Top 42%
×2stories
+19ft-37ft

Overall

11882

Males

8990

M55-59

8990

Half→25K

13.1 - 15.5 mi

Top 45%
×4stories
+66ft-88ft

Overall

12902

Males

9249

M55-59

9249

25K→30K

15.5 - 18.6 mi

Top 46%
×9stories
+181ft-148ft

Overall

13193

Males

9219

M55-59

9219

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

12976

Males

8978

M55-59

8978

20M→21M

20.0 - 21.0 mi

Top 43%
×8stories
+106ft-24ft

Overall

12277

Males

8502

M55-59

8502

21M→35K

21.0 - 21.8 mi

Top 44%
×7stories
+17ft-86ft

Overall

12509

Males

8570

M55-59

8570

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

12065

Males

8265

M55-59

8265

23M→24M

23.0 - 24.0 mi

Top 45%
×6stories
+12ft-82ft

Overall

12782

Males

8545

M55-59

8545

24M→40K

24.0 - 24.9 mi

Top 42%
×1story
+6ft-20ft

Overall

12055

Males

8088

M55-59

8088

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

11436

Males

7696

M55-59

7696

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2stories
+22ft-21ft

Overall

14424

Males

9218

M55-59

9218

Passing Analysis

Category:
Athletes Passed
1823
Passed By
1966
Net Change
-143
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12678
5K → 10K111641-530#12678#13208
10K → 15K137317-180#13208#13388
15K → 20K273105+168#13388#13220
20K → Half816+75#13220#13145
Half → 25K197115+82#13145#13063
25K → 30K262250+12#13063#13051
30K → 20M132107+25#13051#13026
20M → 21M13758+79#13026#12947
21M → 35K6343+20#12947#12927
35K → 23M15155+96#12927#12831
23M → 24M8082-2#12831#12833
24M → 40K8851+37#12833#12796
40K → 25.2M5515+40#12796#12756
25.2M → Finish56121-65#12756#12821
TOTALS18231966-143
📊

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