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BOSTON MARATHON 2025

David Spencer

Bib: 25303•M

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M70-74)
#0 / 228
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:49
Rank: #22216
Start → 5K
8:57/mi
27:49 split
10K· 6.21 mi
55:05
Rank: #21780 (+436)
5K → 10K
8:47/mi
27:16 split
15K· 9.32 mi
1:24:31
Rank: #22567 (-787)
10K → 15K
9:28/mi
29:26 split
20K· 12.43 mi
1:55:48
Rank: #23190 (-623)
15K → 20K
10:04/mi
31:17 split
Half· 13.11 mi
2:02:14
Rank: #23188 (+2)
20K → Half
9:26/mi
6:26 split
25K· 15.53 mi
2:27:58
Rank: #23492 (-304)
Half → 25K
10:37/mi
25:44 split
30K· 18.64 mi
3:02:02
Rank: #23570 (-78)
25K → 30K
10:58/mi
34:04 split
20M
3:16:25
Rank: #23492 (+78)
30K → 20M
10:35/mi
14:23 split
21M
3:28:13
Rank: #23487 (+5)
20M → 21M
11:48/mi
11:48 split
35K· 21.75 mi
3:35:46
Rank: #23405 (+82)
21M → 35K
10:06/mi
7:33 split
23M
3:48:57
Rank: #23347 (+58)
35K → 23M
10:32/mi
13:11 split
24M
3:59:46
Rank: #23355 (-8)
23M → 24M
10:49/mi
10:49 split
40K· 24.85 mi
4:09:07
Rank: #23310 (+45)
24M → 40K
10:56/mi
9:21 split
25.2M
4:13:35
Rank: #23354 (-44)
40K → 25.2M
12:57/mi
4:28 split
Finish· 26.22 mi
4:24:34
Rank: #23453 (-99)
25.2M → Finish
10:47/mi
10:59 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:02:14
Pace9:19 /mi
2nd Half
Distance13.11 mi
Time2:22:20
Pace10:51 /mi
📊Positive Split: 16.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:0227:498:5727:49
8:57
-
10K
6.21 mi11:55:1855:058:5227:16
8:47
-0:10
15K
9.32 mi12:24:441:24:319:0429:26
9:28
+0:41
20K
12.43 mi12:56:011:55:489:1931:17
10:04
+0:36
Half
13.11 mi13:02:272:02:149:196:26
9:26
-0:38
25K
15.53 mi13:28:112:27:589:3225:44
10:37
+1:11
30K
18.64 mi14:02:153:02:029:4634:04
10:58
+0:21
20M
20.00 mi14:16:383:16:259:4914:23
10:35
-0:23
21M
21.00 mi14:28:263:28:139:5511:48
11:48
+1:13
35K
21.75 mi14:35:593:35:469:557:33
10:06
-1:42
23M
23.00 mi14:49:103:48:579:5713:11
10:32
+0:26
24M
24.00 mi14:59:593:59:469:5910:49
10:49
+0:17
40K
24.85 mi15:09:204:09:0710:019:21
10:56
+0:07
25.2M
25.20 mi15:13:484:13:3510:044:28
12:57
+2:01
Finish
26.22 mi15:24:474:24:3410:0610:59
10:47
-2:10

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

8:47 /mi

Average Pace

10:06 /mi

Slowest Pace

12:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:30:57

34% of race

Time at Steady Pace

2:37:21

59% of race

Time at Slower Pace

16:16

6% of race

Average Pace: 10:05 /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 mi11:28:0227:498:5727:49
8:57
#22216
10K
6.21 mi11:55:1855:058:5227:16
8:47
#21780
15K
9.32 mi12:24:441:24:319:0429:26
9:28
#22567
20K
12.43 mi12:56:011:55:489:1931:17
10:04
#23190
Half
13.11 mi13:02:272:02:149:196:26
9:26
#23188
25K
15.53 mi13:28:112:27:589:3225:44
10:37
#23492
30K
18.64 mi14:02:153:02:029:4634:04
10:58
#23570
20M
20.00 mi14:16:383:16:259:4914:23
10:35
#23492
21M
21.00 mi14:28:263:28:139:5511:48
11:48
#23487
35K
21.75 mi14:35:593:35:469:557:33
10:06
#23405
23M
23.00 mi14:49:103:48:579:5713:11
10:32
#23347
24M
24.00 mi14:59:593:59:469:5910:49
10:49
#23355
40K
24.85 mi15:09:204:09:0710:019:21
10:56
#23310
25.2M
25.20 mi15:13:484:13:3510:044:28
12:57
#23354
Finish
26.22 mi15:24:474:24:3410:0610:59
10:47
#23453
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi22216134081340823663(Top 83%)14131(Top 88%)14131(Top 6198%)
10K6.21 mi3.10 mi21780+43613233+17513233+17521287(Top 75%)13040(Top 81%)13040(Top 5719%)
15K9.32 mi3.11 mi22567-78713616-38313616-38323663(Top 83%)14131(Top 88%)14131(Top 6198%)
20K12.43 mi3.11 mi23190-62313900-28413900-28424380(Top 86%)14392(Top 89%)14392(Top 6312%)
Half13.11 mi0.68 mi23188+213903-313903-323342(Top 82%)13942(Top 87%)13942(Top 6115%)
25K15.53 mi2.42 mi23492-30414019-11614019-11624568(Top 86%)14450(Top 90%)14450(Top 6338%)
30K18.64 mi3.11 mi23570-7814016+314016+323944(Top 84%)14042(Top 87%)14042(Top 6159%)
20M20.00 mi1.36 mi23492+7813965+5113965+5122651(Top 80%)13365(Top 83%)13365(Top 5862%)
21M21.00 mi1.00 mi23487+513932+3313932+3323209(Top 82%)13545(Top 84%)13545(Top 5941%)
35K21.75 mi0.75 mi23405+8213885+4713885+4722153(Top 78%)12990(Top 81%)12990(Top 5697%)
23M23.00 mi1.25 mi23347+5813841+4413841+4422095(Top 78%)12929(Top 80%)12929(Top 5671%)
24M24.00 mi1.00 mi23355-813826+1513826+1523593(Top 83%)13615(Top 85%)13615(Top 5971%)
40K24.85 mi0.85 mi23310+4513786+4013786+4022993(Top 81%)13240(Top 82%)13240(Top 5807%)
25.2M25.20 mi0.35 mi23354-4413802-1613802-1624961(Top 88%)14233(Top 88%)14233(Top 6243%)
Finish26.22 mi1.02 mi23453-9913828-2613828-2624899(Top 88%)14224(Top 88%)14224(Top 6239%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 83%
×21story building
+97ft-345ft

Overall

23663

Males

14131

M70-74

14131

5K→10K

3.1 - 6.2 mi

Top 75%
×5story building
+79ft-138ft

Overall

21287

Males

13040

M70-74

13040

10K→15K

6.2 - 9.3 mi

Top 83%
×3story building
+67ft-78ft

Overall

23663

Males

14131

M70-74

14131

15K→20K

9.3 - 12.4 mi

Top 86%
×5story building
+106ft-86ft

Overall

24380

Males

14392

M70-74

14392

20K→Half

12.4 - 13.1 mi

Top 82%
×2story building
+19ft-37ft

Overall

23342

Males

13942

M70-74

13942

Half→25K

13.1 - 15.5 mi

Top 86%
×4story building
+66ft-88ft

Overall

24568

Males

14450

M70-74

14450

25K→30K

15.5 - 18.6 mi

Top 84%
×9story building
+181ft-148ft

Overall

23944

Males

14042

M70-74

14042

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

22651

Males

13365

M70-74

13365

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23209

Males

13545

M70-74

13545

21M→35K

21.0 - 21.8 mi

Top 78%
×7story building
+17ft-86ft

Overall

22153

Males

12990

M70-74

12990

35K→23M

21.8 - 23.0 mi

Top 78%
×5story building
+23ft-63ft

Overall

22095

Males

12929

M70-74

12929

23M→24M

23.0 - 24.0 mi

Top 83%
×6story building
+12ft-82ft

Overall

23593

Males

13615

M70-74

13615

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

22993

Males

13240

M70-74

13240

40K→25.2M

24.9 - 25.2 mi

Top 88%
×1story
+13ft-16ft

Overall

24961

Males

14233

M70-74

14233

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2story building
+22ft-21ft

Overall

24899

Males

14224

M70-74

14224

Passing Analysis

Category:
Athletes Passed
1365
Passed By
2602
Net Change
-1237
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22216
5K → 10K540104+436#22216#21780
10K → 15K51838-787#21780#22567
15K → 20K51674-623#22567#23190
20K → Half3230+2#23190#23188
Half → 25K47351-304#23188#23492
25K → 30K127205-78#23492#23570
30K → 20M11638+78#23570#23492
20M → 21M7873+5#23492#23487
21M → 35K9816+82#23487#23405
35K → 23M7921+58#23405#23347
23M → 24M5159-8#23347#23355
24M → 40K6924+45#23355#23310
40K → 25.2M751-44#23310#23354
25.2M → Finish19118-99#23354#23453
TOTALS13652602-1237
📊

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