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BOSTON MARATHON 2025

Matthew Dempsey

Bib: 31932•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
7:54/mi
24:34
↑ 97↓ 3451.5%
10K· 6.21 mi
7:32/mi
47:57
↑ 79↓ 1380.4%
15K· 9.32 mi
8:01/mi
1:12:52
↑ 67↓ 78
20K· 12.43 mi
8:14/mi
1:38:26
↑ 106↓ 860.1%
Half· 13.11 mi
8:11/mi
1:44:01
↑ 19↓ 370.5%
25K· 15.53 mi
8:43/mi
2:05:10
↑ 66↓ 880.2%
30K· 18.64 mi
10:09/mi
2:36:41
↑ 181↓ 1480.2%
20M
11:01/mi
2:51:39
↑ 64↓ 500.2%
21M
11:28/mi
3:03:07
↑ 106↓ 241.6%
35K· 21.75 mi
10:54/mi
3:11:16
↑ 17↓ 861.7%
23M
10:38/mi
3:24:35
↑ 23↓ 630.6%
24M
10:36/mi
3:35:11
↓ 821.3%
40K· 24.85 mi
11:03/mi
3:44:38
↓ 200.3%
25.2M
11:50/mi
3:48:43
↑ 13↓ 160.2%
Finish· 26.22 mi
10:40/mi
3:59:35
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:01
Pace7:56 /mi
2nd Half
Distance13.11 mi
Time2:15:34
Pace10:20 /mi
📊Positive Split: 30.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:5124:347:5424:34
7:54
-
10K
6.21 mi12:12:1447:577:4323:23
7:32
-0:22
15K
9.32 mi12:37:091:12:527:4924:55
8:01
+0:29
20K
12.43 mi13:02:431:38:267:5525:34
8:14
+0:13
Half
13.11 mi13:08:181:44:017:565:35
8:11
-0:03
25K
15.53 mi13:29:272:05:108:0321:09
8:43
+0:32
30K
18.64 mi14:00:582:36:418:2431:31
10:09
+1:26
20M
20.00 mi14:15:562:51:398:3514:58
11:01
+0:52
21M
21.00 mi14:27:243:03:078:4311:28
11:28
+0:27
35K
21.75 mi14:35:333:11:168:488:09
10:54
-0:34
23M
23.00 mi14:48:523:24:358:5413:19
10:38
-0:16
24M
24.00 mi14:59:283:35:118:5810:36
10:36
-0:02
40K
24.85 mi15:08:553:44:389:029:27
11:03
+0:27
25.2M
25.20 mi15:13:003:48:439:054:05
11:50
+0:47
Finish
26.22 mi15:23:523:59:359:0910:52
10:40
-1:10

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

7:32 /mi

Average Pace

9:09 /mi

Slowest Pace

11:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:05:10

52% of race

Time at Steady Pace

1:38:52

41% of race

Time at Slower Pace

15:33

6% of race

Average Pace: 9:08 /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 mi11:48:5124:347:5424:34
7:54
#15760
10K
6.21 mi12:12:1447:577:4323:23
7:32
#14044
15K
9.32 mi12:37:091:12:527:4924:55
8:01
#14792
20K
12.43 mi13:02:431:38:267:5525:34
8:14
#15273
Half
13.11 mi13:08:181:44:017:565:35
8:11
#15391
25K
15.53 mi13:29:272:05:108:0321:09
8:43
#16005
30K
18.64 mi14:00:582:36:418:2431:31
10:09
#17505
20M
20.00 mi14:15:562:51:398:3514:58
11:01
#18321
21M
21.00 mi14:27:243:03:078:4311:28
11:28
#18732
35K
21.75 mi14:35:333:11:168:488:09
10:54
#19084
23M
23.00 mi14:48:523:24:358:5413:19
10:38
#19383
24M
24.00 mi14:59:283:35:118:5810:36
10:36
#19628
40K
24.85 mi15:08:553:44:389:029:27
11:03
#19854
25.2M
25.20 mi15:13:003:48:439:054:05
11:50
#19934
Finish
26.22 mi15:23:523:59:359:0910:52
10:40
#20274
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi15760107231072316192(Top 57%)10898(Top 68%)10898(Top 193%)
10K6.21 mi3.10 mi14044+171610039+68410039+68412338(Top 43%)9312(Top 58%)9312(Top 165%)
15K9.32 mi3.11 mi14792-74810322-28310322-28316192(Top 57%)10898(Top 68%)10898(Top 193%)
20K12.43 mi3.11 mi15273-48110493-17110493-17116488(Top 58%)10964(Top 68%)10964(Top 194%)
Half13.11 mi0.68 mi15391-11810545-5210545-5217176(Top 60%)11277(Top 70%)11277(Top 200%)
25K15.53 mi2.42 mi16005-61410791-24610791-24618533(Top 65%)11763(Top 73%)11763(Top 208%)
30K18.64 mi3.11 mi17505-150011333-54211333-54222031(Top 78%)13180(Top 82%)13180(Top 234%)
20M20.00 mi1.36 mi18321-81611673-34011673-34023594(Top 83%)13800(Top 86%)13800(Top 245%)
21M21.00 mi1.00 mi18732-41111826-15311826-15322549(Top 79%)13221(Top 82%)13221(Top 234%)
35K21.75 mi0.75 mi19084-35211964-13811964-13823979(Top 84%)13869(Top 86%)13869(Top 246%)
23M23.00 mi1.25 mi19383-29912052-8812052-8822358(Top 79%)13044(Top 81%)13044(Top 231%)
24M24.00 mi1.00 mi19628-24512133-8112133-8123061(Top 81%)13332(Top 83%)13332(Top 236%)
40K24.85 mi0.85 mi19854-22612213-8012213-8023253(Top 82%)13363(Top 83%)13363(Top 237%)
25.2M25.20 mi0.35 mi19934-8012250-3712250-3722857(Top 80%)13200(Top 82%)13200(Top 234%)
Finish26.22 mi1.02 mi20274-34012398-14812398-14824644(Top 87%)14097(Top 88%)14097(Top 250%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

16192

Males

10898

M18-39

10898

5K→10K

3.1 - 6.2 mi

Top 43%
×5story building
+79ft-138ft

Overall

12338

Males

9312

M18-39

9312

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

16192

Males

10898

M18-39

10898

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

16488

Males

10964

M18-39

10964

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

17176

Males

11277

M18-39

11277

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

18533

Males

11763

M18-39

11763

25K→30K

15.5 - 18.6 mi

Top 78%
×9story building
+181ft-148ft

Overall

22031

Males

13180

M18-39

13180

30K→20M

18.6 - 20.0 mi

Top 83%
×5story building
+64ft-50ft

Overall

23594

Males

13800

M18-39

13800

20M→21M

20.0 - 21.0 mi

Top 79%
×8story building
+106ft-24ft

Overall

22549

Males

13221

M18-39

13221

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

23979

Males

13869

M18-39

13869

35K→23M

21.8 - 23.0 mi

Top 79%
×5story building
+23ft-63ft

Overall

22358

Males

13044

M18-39

13044

23M→24M

23.0 - 24.0 mi

Top 81%
×6story building
+12ft-82ft

Overall

23061

Males

13332

M18-39

13332

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

23253

Males

13363

M18-39

13363

40K→25.2M

24.9 - 25.2 mi

Top 80%
×1story
+13ft-16ft

Overall

22857

Males

13200

M18-39

13200

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

24644

Males

14097

M18-39

14097

Passing Analysis

Category:
Athletes Passed
2149
Passed By
6663
Net Change
-4514
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15760
5K → 10K173317+1716#15760#14044
10K → 15K54802-748#14044#14792
15K → 20K105586-481#14792#15273
20K → Half13131-118#15273#15391
Half → 25K54668-614#15391#16005
25K → 30K261526-1500#16005#17505
30K → 20M27843-816#17505#18321
20M → 21M29440-411#18321#18732
21M → 35K12364-352#18732#19084
35K → 23M33332-299#19084#19383
23M → 24M24269-245#19383#19628
24M → 40K20246-226#19628#19854
40K → 25.2M1090-80#19854#19934
25.2M → Finish9349-340#19934#20274
TOTALS21496663-4514
📊

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