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BOSTON MARATHON 2025

David Marchefka

Bib: 2751•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 8%
Gender (Male)
#0 / 16105
Top 13%
Masters (Masters Men)
#0 / 10463
Top 4%
Division (M40-44)
#0 / 2247
Top 11%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:50
Rank: #2984
Start → 5K
6:23/mi
19:50 split
10K· 6.21 mi
39:40
Rank: #2930 (+54)
5K → 10K
6:23/mi
19:50 split
15K· 9.32 mi
59:30
Rank: #2882 (+48)
10K → 15K
6:23/mi
19:50 split
20K· 12.43 mi
1:19:35
Rank: #2866 (+16)
15K → 20K
6:28/mi
20:05 split
Half· 13.11 mi
1:23:53
Rank: #2850 (+16)
20K → Half
6:18/mi
4:18 split
25K· 15.53 mi
1:39:24
Rank: #2735 (+115)
Half → 25K
6:24/mi
15:31 split
30K· 18.64 mi
1:59:54
Rank: #2622 (+113)
25K → 30K
6:36/mi
20:30 split
20M
2:08:52
Rank: #2525 (+97)
30K → 20M
6:36/mi
8:58 split
21M
2:15:45
Rank: #2461 (+64)
20M → 21M
6:53/mi
6:53 split
35K· 21.75 mi
2:20:32
Rank: #2421 (+40)
21M → 35K
6:24/mi
4:47 split
23M
2:28:49
Rank: #2367 (+54)
35K → 23M
6:37/mi
8:17 split
24M
2:35:19
Rank: #2328 (+39)
23M → 24M
6:30/mi
6:30 split
40K· 24.85 mi
2:40:57
Rank: #2286 (+42)
24M → 40K
6:35/mi
5:38 split
25.2M
2:43:24
Rank: #2266 (+20)
40K → 25.2M
7:06/mi
2:27 split
Finish· 26.22 mi
2:49:51
Rank: #2242 (+24)
25.2M → Finish
6:20/mi
6:27 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:53
Pace6:24 /mi
2nd Half
Distance13.11 mi
Time1:25:58
Pace6:33 /mi
📊Positive Split: 2.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:1519:506:2319:50
6:23
-
10K
6.21 mi10:41:0539:406:2319:50
6:23
0:00
15K
9.32 mi11:00:5559:306:2319:50
6:23
0:00
20K
12.43 mi11:21:001:19:356:2420:05
6:28
+0:05
Half
13.11 mi11:25:181:23:536:244:18
6:18
-0:10
25K
15.53 mi11:40:491:39:246:2415:31
6:24
+0:06
30K
18.64 mi12:01:191:59:546:2620:30
6:36
+0:12
20M
20.00 mi12:10:172:08:526:278:58
6:36
0:00
21M
21.00 mi12:17:102:15:456:286:53
6:53
+0:17
35K
21.75 mi12:21:572:20:326:284:47
6:24
-0:29
23M
23.00 mi12:30:142:28:496:288:17
6:37
+0:13
24M
24.00 mi12:36:442:35:196:286:30
6:30
-0:07
40K
24.85 mi12:42:222:40:576:295:38
6:35
+0:05
25.2M
25.20 mi12:44:492:43:246:292:27
7:06
+0:31
Finish
26.22 mi12:51:162:49:516:296:27
6:20
-0:46

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

6:18 /mi

Average Pace

6:29 /mi

Slowest Pace

7:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:24

99% of race

Time at Steady Pace

2:27

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:29 /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 mi10:21:1519:506:2319:50
6:23
#2984
10K
6.21 mi10:41:0539:406:2319:50
6:23
#2930
15K
9.32 mi11:00:5559:306:2319:50
6:23
#2882
20K
12.43 mi11:21:001:19:356:2420:05
6:28
#2866
Half
13.11 mi11:25:181:23:536:244:18
6:18
#2850
25K
15.53 mi11:40:491:39:246:2415:31
6:24
#2735
30K
18.64 mi12:01:191:59:546:2620:30
6:36
#2622
20M
20.00 mi12:10:172:08:526:278:58
6:36
#2525
21M
21.00 mi12:17:102:15:456:286:53
6:53
#2461
35K
21.75 mi12:21:572:20:326:284:47
6:24
#2421
23M
23.00 mi12:30:142:28:496:288:17
6:37
#2367
24M
24.00 mi12:36:442:35:196:286:30
6:30
#2328
40K
24.85 mi12:42:222:40:576:295:38
6:35
#2286
25.2M
25.20 mi12:44:492:43:246:292:27
7:06
#2266
Finish
26.22 mi12:51:162:49:516:296:27
6:20
#2242
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi2984283728372826(Top 10%)2691(Top 17%)2691(Top 120%)
10K6.21 mi3.10 mi2930+542792+452792+452926(Top 10%)2785(Top 17%)2785(Top 124%)
15K9.32 mi3.11 mi2882+482746+462746+462826(Top 10%)2691(Top 17%)2691(Top 120%)
20K12.43 mi3.11 mi2866+162733+132733+132893(Top 10%)2755(Top 17%)2755(Top 123%)
Half13.11 mi0.68 mi2850+162717+162717+162496(Top 9%)2385(Top 15%)2385(Top 106%)
25K15.53 mi2.42 mi2735+1152609+1082609+1082357(Top 8%)2242(Top 14%)2242(Top 100%)
30K18.64 mi3.11 mi2622+1132501+1082501+1082402(Top 8%)2274(Top 14%)2274(Top 101%)
20M20.00 mi1.36 mi2525+972409+922409+922009(Top 7%)1899(Top 12%)1899(Top 85%)
21M21.00 mi1.00 mi2461+642348+612348+611816(Top 6%)1711(Top 11%)1711(Top 76%)
35K21.75 mi0.75 mi2421+402310+382310+381980(Top 7%)1854(Top 12%)1854(Top 83%)
23M23.00 mi1.25 mi2367+542255+552255+551889(Top 7%)1766(Top 11%)1766(Top 79%)
24M24.00 mi1.00 mi2328+392216+392216+392034(Top 7%)1887(Top 12%)1887(Top 84%)
40K24.85 mi0.85 mi2286+422173+432173+431917(Top 7%)1767(Top 11%)1767(Top 79%)
25.2M25.20 mi0.35 mi2266+202153+202153+201790(Top 6%)1629(Top 10%)1629(Top 72%)
Finish26.22 mi1.02 mi2242+242127+262127+262008(Top 7%)1845(Top 11%)1845(Top 82%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21story building
+97ft-345ft

Overall

2826

Males

2691

M40-44

2691

5K→10K

3.1 - 6.2 mi

Top 10%
×5story building
+79ft-138ft

Overall

2926

Males

2785

M40-44

2785

10K→15K

6.2 - 9.3 mi

Top 10%
×3story building
+67ft-78ft

Overall

2826

Males

2691

M40-44

2691

15K→20K

9.3 - 12.4 mi

Top 10%
×5story building
+106ft-86ft

Overall

2893

Males

2755

M40-44

2755

20K→Half

12.4 - 13.1 mi

Top 9%
×2story building
+19ft-37ft

Overall

2496

Males

2385

M40-44

2385

Half→25K

13.1 - 15.5 mi

Top 8%
×4story building
+66ft-88ft

Overall

2357

Males

2242

M40-44

2242

25K→30K

15.5 - 18.6 mi

Top 8%
×9story building
+181ft-148ft

Overall

2402

Males

2274

M40-44

2274

30K→20M

18.6 - 20.0 mi

Top 7%
×5story building
+64ft-50ft

Overall

2009

Males

1899

M40-44

1899

20M→21M

20.0 - 21.0 mi

Top 6%
×8story building
+106ft-24ft

Overall

1816

Males

1711

M40-44

1711

21M→35K

21.0 - 21.8 mi

Top 7%
×7story building
+17ft-86ft

Overall

1980

Males

1854

M40-44

1854

35K→23M

21.8 - 23.0 mi

Top 7%
×5story building
+23ft-63ft

Overall

1889

Males

1766

M40-44

1766

23M→24M

23.0 - 24.0 mi

Top 7%
×6story building
+12ft-82ft

Overall

2034

Males

1887

M40-44

1887

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

1917

Males

1767

M40-44

1767

40K→25.2M

24.9 - 25.2 mi

Top 6%
×1story
+13ft-16ft

Overall

1790

Males

1629

M40-44

1629

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2story building
+22ft-21ft

Overall

2008

Males

1845

M40-44

1845

Passing Analysis

Category:
Athletes Passed
1150
Passed By
408
Net Change
+742
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2984
5K → 10K163109+54#2984#2930
10K → 15K10860+48#2930#2882
15K → 20K8771+16#2882#2866
20K → Half259+16#2866#2850
Half → 25K13015+115#2850#2735
25K → 30K14734+113#2735#2622
30K → 20M10710+97#2622#2525
20M → 21M8016+64#2525#2461
21M → 35K5111+40#2461#2421
35K → 23M7420+54#2421#2367
23M → 24M5112+39#2367#2328
24M → 40K5614+42#2328#2286
40K → 25.2M233+20#2286#2266
25.2M → Finish4824+24#2266#2242
TOTALS1150408+742
📊

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