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BOSTON MARATHON 2025

Tom Prew

Bib: 4356•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 26%
Gender (Male)
#0 / 16105
Top 38%
Masters (Masters Men)
#0 / 10463
Top 25%
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
19:57
Rank: #3272
Start → 5K
19:57 | 6:25/mi
10K· 6.21 mi
39:52
Rank: #3173 (+99)
5K → 10K
19:55 | 6:25/mi
15K· 9.32 mi
1:00:29
Rank: #3618 (-445)
10K → 15K
20:37 | 6:38/mi
20K· 12.43 mi
1:20:47
Rank: #3513 (+105)
15K → 20K
20:18 | 6:32/mi
Half· 13.11 mi
1:25:10
Rank: #3485 (+28)
20K → Half
4:23 | 6:25/mi
25K· 15.53 mi
1:41:07
Rank: #3439 (+46)
Half → 25K
15:57 | 6:35/mi
30K· 18.64 mi
2:04:47
Rank: #4267 (-828)
25K → 30K
23:40 | 7:37/mi
20M
2:16:03
Rank: #4939 (-672)
30K → 20M
11:16 | 8:17/mi
21M
2:24:26
Rank: #5251 (-312)
20M → 21M
8:23 | 8:23/mi
35K· 21.75 mi
2:30:30
Rank: #5535 (-284)
21M → 35K
6:04 | 8:07/mi
23M
2:42:26
Rank: #6193 (-658)
35K → 23M
11:56 | 9:32/mi
24M
2:51:01
Rank: #6477 (-284)
23M → 24M
8:35 | 8:35/mi
40K· 24.85 mi
2:58:32
Rank: #6751 (-274)
24M → 40K
7:31 | 8:47/mi
25.2M
3:01:54
Rank: #6877 (-126)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
3:10:47
Rank: #7266 (-389)
25.2M → Finish
8:53 | 8:43/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:10
Pace6:30 /mi
2nd Half
Distance13.11 mi
Time1:45:37
Pace8:03 /mi
📊Positive Split: 24.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1019:576:2519:57
6:25
-
10K
6.21 mi10:43:0539:526:2519:55
6:25
0:00
15K
9.32 mi11:03:421:00:296:2920:37
6:38
+0:13
20K
12.43 mi11:24:001:20:476:3020:18
6:32
-0:06
Half
13.11 mi11:28:231:25:106:304:23
6:25
-0:07
25K
15.53 mi11:44:201:41:076:3115:57
6:35
+0:10
30K
18.64 mi12:08:002:04:476:4223:40
7:37
+1:02
20M
20.00 mi12:19:162:16:036:4811:16
8:17
+0:40
21M
21.00 mi12:27:392:24:266:538:23
8:23
+0:06
35K
21.75 mi12:33:432:30:306:556:04
8:07
-0:16
23M
23.00 mi12:45:392:42:267:0411:56
9:32
+1:25
24M
24.00 mi12:54:142:51:017:088:35
8:35
-0:57
40K
24.85 mi13:01:452:58:327:117:31
8:47
+0:12
25.2M
25.20 mi13:05:073:01:547:133:22
9:46
+0:59
Finish
26.22 mi13:14:003:10:477:178:53
8:43
-1:03

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

6:25 /mi

Average Pace

7:17 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:07

53% of race

Time at Steady Pace

57:58

30% of race

Time at Slower Pace

31:42

17% of race

Average Pace: 7:17 /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 mi10:23:1019:576:2519:57
6:25
#3272
10K
6.21 mi10:43:0539:526:2519:55
6:25
#3173
15K
9.32 mi11:03:421:00:296:2920:37
6:38
#3618
20K
12.43 mi11:24:001:20:476:3020:18
6:32
#3513
Half
13.11 mi11:28:231:25:106:304:23
6:25
#3485
25K
15.53 mi11:44:201:41:076:3115:57
6:35
#3439
30K
18.64 mi12:08:002:04:476:4223:40
7:37
#4267
20M
20.00 mi12:19:162:16:036:4811:16
8:17
#4939
21M
21.00 mi12:27:392:24:266:538:23
8:23
#5251
35K
21.75 mi12:33:432:30:306:556:04
8:07
#5535
23M
23.00 mi12:45:392:42:267:0411:56
9:32
#6193
24M
24.00 mi12:54:142:51:017:088:35
8:35
#6477
40K
24.85 mi13:01:452:58:327:117:31
8:47
#6751
25.2M
25.20 mi13:05:073:01:547:133:22
9:46
#6877
Finish
26.22 mi13:14:003:10:477:178:53
8:43
#7266
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi3272310731074545(Top 16%)4256(Top 26%)4256(Top 189%)
10K6.21 mi3.10 mi3173+993018+893018+893108(Top 11%)2957(Top 18%)2957(Top 132%)
15K9.32 mi3.11 mi3618-4453425-4073425-4074545(Top 16%)4256(Top 26%)4256(Top 189%)
20K12.43 mi3.11 mi3513+1053330+953330+953312(Top 12%)3137(Top 19%)3137(Top 140%)
Half13.11 mi0.68 mi3485+283302+283302+283230(Top 11%)3071(Top 19%)3071(Top 137%)
25K15.53 mi2.42 mi3439+463263+393263+393334(Top 12%)3153(Top 20%)3153(Top 140%)
30K18.64 mi3.11 mi4267-8283995-7323995-7328559(Top 30%)6908(Top 43%)6908(Top 307%)
20M20.00 mi1.36 mi4939-6724560-5654560-56512388(Top 44%)8707(Top 54%)8707(Top 387%)
21M21.00 mi1.00 mi5251-3124810-2504810-2509704(Top 34%)7196(Top 45%)7196(Top 320%)
35K21.75 mi0.75 mi5535-2845041-2315041-23112926(Top 46%)8750(Top 54%)8750(Top 389%)
23M23.00 mi1.25 mi6193-6585526-4855526-48518807(Top 66%)11349(Top 70%)11349(Top 505%)
24M24.00 mi1.00 mi6477-2845714-1885714-18815002(Top 53%)9571(Top 59%)9571(Top 426%)
40K24.85 mi0.85 mi6751-2745868-1545868-15415093(Top 53%)9469(Top 59%)9469(Top 421%)
25.2M25.20 mi0.35 mi6877-1265946-785946-7815818(Top 56%)9755(Top 61%)9755(Top 434%)
Finish26.22 mi1.02 mi7266-3896172-2266172-22617533(Top 62%)10636(Top 66%)10636(Top 473%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 16%
×21stories
+97ft-345ft

Overall

4545

Males

4256

M40-44

4256

5K→10K

3.1 - 6.2 mi

Top 11%
×5stories
+79ft-138ft

Overall

3108

Males

2957

M40-44

2957

10K→15K

6.2 - 9.3 mi

Top 16%
×3stories
+67ft-78ft

Overall

4545

Males

4256

M40-44

4256

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3312

Males

3137

M40-44

3137

20K→Half

12.4 - 13.1 mi

Top 11%
×2stories
+19ft-37ft

Overall

3230

Males

3071

M40-44

3071

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3334

Males

3153

M40-44

3153

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

8559

Males

6908

M40-44

6908

30K→20M

18.6 - 20.0 mi

Top 44%
×5stories
+64ft-50ft

Overall

12388

Males

8707

M40-44

8707

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9704

Males

7196

M40-44

7196

21M→35K

21.0 - 21.8 mi

Top 46%
×7stories
+17ft-86ft

Overall

12926

Males

8750

M40-44

8750

35K→23M

21.8 - 23.0 mi

Top 66%
×5stories
+23ft-63ft

Overall

18807

Males

11349

M40-44

11349

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

15002

Males

9571

M40-44

9571

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15093

Males

9469

M40-44

9469

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

15818

Males

9755

M40-44

9755

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

17533

Males

10636

M40-44

10636

Passing Analysis

Category:
Athletes Passed
592
Passed By
4586
Net Change
-3994
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3272
5K → 10K18788+99#3272#3173
10K → 15K14459-445#3173#3618
15K → 20K15045+105#3618#3513
20K → Half335+28#3513#3485
Half → 25K9044+46#3485#3439
25K → 30K19847-828#3439#4267
30K → 20M4676-672#4267#4939
20M → 21M22334-312#4939#5251
21M → 35K9293-284#5251#5535
35K → 23M14672-658#5535#6193
23M → 24M17301-284#6193#6477
24M → 40K18292-274#6477#6751
40K → 25.2M7133-126#6751#6877
25.2M → Finish8397-389#6877#7266
TOTALS5924586-3994
📊

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