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BOSTON MARATHON 2025

David Mason

Bib: 11715•M

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:09/mi
22:12
↑ 97↓ 3451.5%
10K· 6.21 mi
7:11/mi
44:32
↑ 79↓ 1380.4%
15K· 9.32 mi
7:20/mi
1:07:20
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:31:36
↑ 106↓ 860.1%
Half· 13.11 mi
7:39/mi
1:36:49
↑ 19↓ 370.5%
25K· 15.53 mi
9:00/mi
1:58:39
↑ 66↓ 880.2%
30K· 18.64 mi
10:26/mi
2:31:03
↑ 181↓ 1480.2%
20M
10:12/mi
2:44:54
↑ 64↓ 500.2%
21M
11:30/mi
2:56:24
↑ 106↓ 241.6%
35K· 21.75 mi
10:36/mi
3:04:20
↑ 17↓ 861.7%
23M
10:45/mi
3:17:48
↑ 23↓ 630.6%
24M
10:56/mi
3:28:44
↓ 821.3%
40K· 24.85 mi
12:16/mi
3:39:13
↓ 200.3%
25.2M
14:21/mi
3:44:10
↑ 13↓ 160.2%
Finish· 26.22 mi
13:41/mi
3:58:07
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:49
Pace7:23 /mi
2nd Half
Distance13.11 mi
Time2:21:18
Pace10:47 /mi
📊Positive Split: 45.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:1122:127:0922:12
7:09
-
10K
6.21 mi11:11:3144:327:1022:20
7:11
+0:02
15K
9.32 mi11:34:191:07:207:1322:48
7:20
+0:09
20K
12.43 mi11:58:351:31:367:2224:16
7:49
+0:29
Half
13.11 mi12:03:481:36:497:235:13
7:39
-0:10
25K
15.53 mi12:25:381:58:397:3821:50
9:00
+1:21
30K
18.64 mi12:58:022:31:038:0632:24
10:26
+1:26
20M
20.00 mi13:11:532:44:548:1513:51
10:12
-0:14
21M
21.00 mi13:23:232:56:248:2411:30
11:30
+1:18
35K
21.75 mi13:31:193:04:208:297:56
10:36
-0:54
23M
23.00 mi13:44:473:17:488:3613:28
10:45
+0:09
24M
24.00 mi13:55:433:28:448:4210:56
10:56
+0:11
40K
24.85 mi14:06:123:39:138:4910:29
12:16
+1:20
25.2M
25.20 mi14:11:093:44:108:544:57
14:21
+2:05
Finish
26.22 mi14:25:063:58:079:0513:57
13:41
-0:40

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

7:09 /mi

Average Pace

9:05 /mi

Slowest Pace

14:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:58:39

50% of race

Time at Steady Pace

1:30:05

38% of race

Time at Slower Pace

29:23

12% of race

Average Pace: 9:05 /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 mi10:49:1122:127:0922:12
7:09
#9032
10K
6.21 mi11:11:3144:327:1022:20
7:11
#9176
15K
9.32 mi11:34:191:07:207:1322:48
7:20
#9530
20K
12.43 mi11:58:351:31:367:2224:16
7:49
#10505
Half
13.11 mi12:03:481:36:497:235:13
7:39
#10626
25K
15.53 mi12:25:381:58:397:3821:50
9:00
#12508
30K
18.64 mi12:58:022:31:038:0632:24
10:26
#15527
20M
20.00 mi13:11:532:44:548:1513:51
10:12
#16166
21M
21.00 mi13:23:232:56:248:2411:30
11:30
#16714
35K
21.75 mi13:31:193:04:208:297:56
10:36
#17117
23M
23.00 mi13:44:473:17:488:3613:28
10:45
#17667
24M
24.00 mi13:55:433:28:448:4210:56
10:56
#18136
40K
24.85 mi14:06:123:39:138:4910:29
12:16
#18744
25.2M
25.20 mi14:11:093:44:108:544:57
14:21
#19015
Finish
26.22 mi14:25:063:58:079:0513:57
13:41
#19957
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi90327634763410312(Top 36%)8258(Top 51%)8258(Top 414%)
10K6.21 mi3.10 mi9176-1447708-747708-749393(Top 33%)7823(Top 49%)7823(Top 392%)
15K9.32 mi3.11 mi9530-3547891-1837891-18310312(Top 36%)8258(Top 51%)8258(Top 414%)
20K12.43 mi3.11 mi10505-9758376-4858376-48513358(Top 47%)9588(Top 60%)9588(Top 480%)
Half13.11 mi0.68 mi10626-1218439-638439-6312970(Top 46%)9477(Top 59%)9477(Top 475%)
25K15.53 mi2.42 mi12508-18829278-8399278-83919917(Top 70%)12376(Top 77%)12376(Top 620%)
30K18.64 mi3.11 mi15527-301910522-124410522-124422761(Top 80%)13509(Top 84%)13509(Top 677%)
20M20.00 mi1.36 mi16166-63910755-23310755-23321541(Top 76%)12832(Top 80%)12832(Top 643%)
21M21.00 mi1.00 mi16714-54810955-20010955-20022602(Top 80%)13245(Top 82%)13245(Top 664%)
35K21.75 mi0.75 mi17117-40311094-13911094-13923365(Top 82%)13565(Top 84%)13565(Top 680%)
23M23.00 mi1.25 mi17667-55011307-21311307-21322642(Top 80%)13165(Top 82%)13165(Top 660%)
24M24.00 mi1.00 mi18136-46911494-18711494-18723838(Top 84%)13737(Top 85%)13737(Top 688%)
40K24.85 mi0.85 mi18744-60811733-23911733-23925318(Top 89%)14421(Top 90%)14421(Top 722%)
25.2M25.20 mi0.35 mi19015-27111845-11211845-11226607(Top 94%)15064(Top 94%)15064(Top 755%)
Finish26.22 mi1.02 mi19957-94212242-39712242-39727937(Top 98%)15805(Top 98%)15805(Top 792%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 36%
×21story building
+97ft-345ft

Overall

10312

Males

8258

M50-54

8258

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

9393

Males

7823

M50-54

7823

10K→15K

6.2 - 9.3 mi

Top 36%
×3story building
+67ft-78ft

Overall

10312

Males

8258

M50-54

8258

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13358

Males

9588

M50-54

9588

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12970

Males

9477

M50-54

9477

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

19917

Males

12376

M50-54

12376

25K→30K

15.5 - 18.6 mi

Top 80%
×9story building
+181ft-148ft

Overall

22761

Males

13509

M50-54

13509

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

21541

Males

12832

M50-54

12832

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

22602

Males

13245

M50-54

13245

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23365

Males

13565

M50-54

13565

35K→23M

21.8 - 23.0 mi

Top 80%
×5story building
+23ft-63ft

Overall

22642

Males

13165

M50-54

13165

23M→24M

23.0 - 24.0 mi

Top 84%
×6story building
+12ft-82ft

Overall

23838

Males

13737

M50-54

13737

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

25318

Males

14421

M50-54

14421

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

26607

Males

15064

M50-54

15064

25.2M→Finish

25.2 - 26.2 mi

Top 98%
×2story building
+22ft-21ft

Overall

27937

Males

15805

M50-54

15805

Passing Analysis

Category:
Athletes Passed
418
Passed By
11341
Net Change
-10925
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9032
5K → 10K169313-144#9032#9176
10K → 15K67421-354#9176#9530
15K → 20K331006-975#9530#10505
20K → Half10131-121#10505#10626
Half → 25K131895-1882#10626#12508
25K → 30K133032-3019#12508#15527
30K → 20M24663-639#15527#16166
20M → 21M18566-548#16166#16714
21M → 35K11414-403#16714#17117
35K → 23M28578-550#17117#17667
23M → 24M22491-469#17667#18136
24M → 40K6614-608#18136#18744
40K → 25.2M3274-271#18744#19015
25.2M → Finish1943-942#19015#19957
TOTALS41811341-10925
📊

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