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BOSTON MARATHON 2025

David Belbeck

Bib: 13557•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 49%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Top 41%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:53
Rank: #13854
Start → 5K
7:41/mi
23:53 split
10K· 6.21 mi
47:49
Rank: #13881 (-27)
5K → 10K
7:42/mi
23:56 split
15K· 9.32 mi
1:11:58
Rank: #13933 (-52)
10K → 15K
7:46/mi
24:09 split
20K· 12.43 mi
1:36:16
Rank: #13761 (+172)
15K → 20K
7:49/mi
24:18 split
Half· 13.11 mi
1:41:33
Rank: #13755 (+6)
20K → Half
7:45/mi
5:17 split
25K· 15.53 mi
2:00:43
Rank: #13630 (+125)
Half → 25K
7:54/mi
19:10 split
30K· 18.64 mi
2:26:30
Rank: #13554 (+76)
25K → 30K
8:18/mi
25:47 split
20M
2:38:04
Rank: #13548 (+6)
30K → 20M
8:31/mi
11:34 split
21M
2:47:22
Rank: #13617 (-69)
20M → 21M
9:18/mi
9:18 split
35K· 21.75 mi
2:53:34
Rank: #13630 (-13)
21M → 35K
8:17/mi
6:12 split
23M
3:04:24
Rank: #13643 (-13)
35K → 23M
8:39/mi
10:50 split
24M
3:12:59
Rank: #13730 (-87)
23M → 24M
8:35/mi
8:35 split
40K· 24.85 mi
3:20:28
Rank: #13758 (-28)
24M → 40K
8:45/mi
7:29 split
25.2M
3:23:52
Rank: #13810 (-52)
40K → 25.2M
9:52/mi
3:24 split
Finish· 26.22 mi
3:32:38
Rank: #13932 (-122)
25.2M → Finish
8:36/mi
8:46 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:33
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:51:05
Pace8:28 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:4823:537:4123:53
7:41
-
10K
6.21 mi11:38:4447:497:4223:56
7:42
+0:01
15K
9.32 mi12:02:531:11:587:4324:09
7:46
+0:04
20K
12.43 mi12:27:111:36:167:4524:18
7:49
+0:03
Half
13.11 mi12:32:281:41:337:455:17
7:45
-0:04
25K
15.53 mi12:51:382:00:437:4619:10
7:54
+0:09
30K
18.64 mi13:17:252:26:307:5225:47
8:18
+0:24
20M
20.00 mi13:28:592:38:047:5411:34
8:31
+0:13
21M
21.00 mi13:38:172:47:227:589:18
9:18
+0:47
35K
21.75 mi13:44:292:53:347:596:12
8:17
-1:01
23M
23.00 mi13:55:193:04:248:0110:50
8:39
+0:22
24M
24.00 mi14:03:543:12:598:028:35
8:35
-0:04
40K
24.85 mi14:11:233:20:288:047:29
8:45
+0:10
25.2M
25.20 mi14:14:473:23:528:053:24
9:52
+1:07
Finish
26.22 mi14:23:333:32:388:078:46
8:36
-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

7:41 /mi

Average Pace

8:07 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:00:43

57% of race

Time at Steady Pace

1:00:54

29% of race

Time at Slower Pace

31:01

15% of race

Average Pace: 8:07 /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 mi11:14:4823:537:4123:53
7:41
#13854
10K
6.21 mi11:38:4447:497:4223:56
7:42
#13881
15K
9.32 mi12:02:531:11:587:4324:09
7:46
#13933
20K
12.43 mi12:27:111:36:167:4524:18
7:49
#13761
Half
13.11 mi12:32:281:41:337:455:17
7:45
#13755
25K
15.53 mi12:51:382:00:437:4619:10
7:54
#13630
30K
18.64 mi13:17:252:26:307:5225:47
8:18
#13554
20M
20.00 mi13:28:592:38:047:5411:34
8:31
#13548
21M
21.00 mi13:38:172:47:227:589:18
9:18
#13617
35K
21.75 mi13:44:292:53:347:596:12
8:17
#13630
23M
23.00 mi13:55:193:04:248:0110:50
8:39
#13643
24M
24.00 mi14:03:543:12:598:028:35
8:35
#13730
40K
24.85 mi14:11:233:20:288:047:29
8:45
#13758
25.2M
25.20 mi14:14:473:23:528:053:24
9:52
#13810
Finish
26.22 mi14:23:333:32:388:078:46
8:36
#13932
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi13854100071000714131(Top 50%)9993(Top 62%)9993(Top 606%)
10K6.21 mi3.10 mi13881-279971+369971+3613917(Top 49%)9965(Top 62%)9965(Top 605%)
15K9.32 mi3.11 mi13933-529962+99962+914131(Top 50%)9993(Top 62%)9993(Top 606%)
20K12.43 mi3.11 mi13761+1729849+1139849+11313437(Top 47%)9623(Top 60%)9623(Top 584%)
Half13.11 mi0.68 mi13755+69830+199830+1913731(Top 48%)9780(Top 61%)9780(Top 593%)
25K15.53 mi2.42 mi13630+1259759+719759+7113121(Top 46%)9352(Top 58%)9352(Top 567%)
30K18.64 mi3.11 mi13554+769662+979662+9713494(Top 48%)9357(Top 58%)9357(Top 568%)
20M20.00 mi1.36 mi13548+69635+279635+2713845(Top 49%)9368(Top 58%)9368(Top 568%)
21M21.00 mi1.00 mi13617-699618+179618+1715128(Top 53%)9840(Top 61%)9840(Top 597%)
35K21.75 mi0.75 mi13630-139608+109608+1014157(Top 50%)9354(Top 58%)9354(Top 568%)
23M23.00 mi1.25 mi13643-139570+389570+3814238(Top 50%)9273(Top 58%)9273(Top 563%)
24M24.00 mi1.00 mi13730-879585-159585-1515023(Top 53%)9592(Top 60%)9592(Top 582%)
40K24.85 mi0.85 mi13758-289563+229563+2214894(Top 52%)9391(Top 58%)9391(Top 570%)
25.2M25.20 mi0.35 mi13810-529569-69569-616311(Top 57%)10021(Top 62%)10021(Top 608%)
Finish26.22 mi1.02 mi13932-1229611-429611-4216824(Top 59%)10305(Top 64%)10305(Top 625%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21story building
+97ft-345ft

Overall

14131

Males

9993

M55-59

9993

5K→10K

3.1 - 6.2 mi

Top 49%
×5story building
+79ft-138ft

Overall

13917

Males

9965

M55-59

9965

10K→15K

6.2 - 9.3 mi

Top 50%
×3story building
+67ft-78ft

Overall

14131

Males

9993

M55-59

9993

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13437

Males

9623

M55-59

9623

20K→Half

12.4 - 13.1 mi

Top 48%
×2story building
+19ft-37ft

Overall

13731

Males

9780

M55-59

9780

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

13121

Males

9352

M55-59

9352

25K→30K

15.5 - 18.6 mi

Top 48%
×9story building
+181ft-148ft

Overall

13494

Males

9357

M55-59

9357

30K→20M

18.6 - 20.0 mi

Top 49%
×5story building
+64ft-50ft

Overall

13845

Males

9368

M55-59

9368

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

15128

Males

9840

M55-59

9840

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

14157

Males

9354

M55-59

9354

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

14238

Males

9273

M55-59

9273

23M→24M

23.0 - 24.0 mi

Top 53%
×6story building
+12ft-82ft

Overall

15023

Males

9592

M55-59

9592

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

14894

Males

9391

M55-59

9391

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16311

Males

10021

M55-59

10021

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

16824

Males

10305

M55-59

10305

Passing Analysis

Category:
Athletes Passed
1838
Passed By
1916
Net Change
-78
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13854
5K → 10K266293-27#13854#13881
10K → 15K170222-52#13881#13933
15K → 20K297125+172#13933#13761
20K → Half4034+6#13761#13755
Half → 25K233108+125#13755#13630
25K → 30K270194+76#13630#13554
30K → 20M126120+6#13554#13548
20M → 21M82151-69#13548#13617
21M → 35K5164-13#13617#13630
35K → 23M112125-13#13630#13643
23M → 24M57144-87#13643#13730
24M → 40K80108-28#13730#13758
40K → 25.2M1971-52#13758#13810
25.2M → Finish35157-122#13810#13932
TOTALS18381916-78
📊

Passing Visuals

Category:
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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