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BOSTON MARATHON 2025

Matthew Underhill

Bib: 1536•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 3%
Gender (Male)
#0 / 16105
Top 5%
Division (M18-39)
#0 / 5642
Top 12%
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
5:58/mi
18:32
↑ 97↓ 3451.5%
10K· 6.21 mi
5:57/mi
37:00
↑ 79↓ 1380.4%
15K· 9.32 mi
5:59/mi
55:35
↑ 67↓ 78
20K· 12.43 mi
6:02/mi
1:14:20
↑ 106↓ 860.1%
Half· 13.11 mi
6:02/mi
1:18:27
↑ 19↓ 370.5%
25K· 15.53 mi
6:06/mi
1:33:15
↑ 66↓ 880.2%
30K· 18.64 mi
6:16/mi
1:52:43
↑ 181↓ 1480.2%
20M
6:23/mi
2:01:24
↑ 64↓ 500.2%
21M
6:35/mi
2:07:59
↑ 106↓ 241.6%
35K· 21.75 mi
6:06/mi
2:12:33
↑ 17↓ 861.7%
23M
6:22/mi
2:20:31
↑ 23↓ 630.6%
24M
6:12/mi
2:26:43
↓ 821.3%
40K· 24.85 mi
6:14/mi
2:32:03
↓ 200.3%
25.2M
6:49/mi
2:34:24
↑ 13↓ 160.2%
Finish· 26.22 mi
6:02/mi
2:40:33
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:18:27
Pace5:59 /mi
2nd Half
Distance13.11 mi
Time1:22:06
Pace6:16 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:19:0218:325:5818:32
5:58
-
10K
6.21 mi10:37:3037:005:5718:28
5:57
-0:01
15K
9.32 mi10:56:0555:355:5818:35
5:59
+0:02
20K
12.43 mi11:14:501:14:205:5918:45
6:02
+0:03
Half
13.11 mi11:18:571:18:275:594:07
6:02
0:00
25K
15.53 mi11:33:451:33:156:0014:48
6:06
+0:04
30K
18.64 mi11:53:131:52:436:0319:28
6:16
+0:10
20M
20.00 mi12:01:542:01:246:048:41
6:23
+0:07
21M
21.00 mi12:08:292:07:596:066:35
6:35
+0:12
35K
21.75 mi12:13:032:12:336:064:34
6:06
-0:29
23M
23.00 mi12:21:012:20:316:077:58
6:22
+0:16
24M
24.00 mi12:27:132:26:436:076:12
6:12
-0:10
40K
24.85 mi12:32:332:32:036:075:20
6:14
+0:02
25.2M
25.20 mi12:34:542:34:246:082:21
6:49
+0:35
Finish
26.22 mi12:41:032:40:336:086:09
6:02
-0:47

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

5:57 /mi

Average Pace

6:08 /mi

Slowest Pace

6:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:31:37

94% of race

Time at Steady Pace

8:56

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:07 /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 mi10:19:0218:325:5818:32
5:58
#973
10K
6.21 mi10:37:3037:005:5718:28
5:57
#952
15K
9.32 mi10:56:0555:355:5818:35
5:59
#956
20K
12.43 mi11:14:501:14:205:5918:45
6:02
#945
Half
13.11 mi11:18:571:18:275:594:07
6:02
#960
25K
15.53 mi11:33:451:33:156:0014:48
6:06
#961
30K
18.64 mi11:53:131:52:436:0319:28
6:16
#953
20M
20.00 mi12:01:542:01:246:048:41
6:23
#944
21M
21.00 mi12:08:292:07:596:066:35
6:35
#922
35K
21.75 mi12:13:032:12:336:064:34
6:06
#903
23M
23.00 mi12:21:012:20:316:077:58
6:22
#904
24M
24.00 mi12:27:132:26:436:076:12
6:12
#897
40K
24.85 mi12:32:332:32:036:075:20
6:14
#878
25.2M
25.20 mi12:34:542:34:246:082:21
6:49
#872
Finish
26.22 mi12:41:032:40:336:086:09
6:02
#850
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi973915915972(Top 3%)919(Top 6%)919(Top 16%)
10K6.21 mi3.10 mi952+21895+20895+20946(Top 3%)891(Top 6%)891(Top 16%)
15K9.32 mi3.11 mi956-4900-5900-5972(Top 3%)919(Top 6%)919(Top 16%)
20K12.43 mi3.11 mi945+11889+11889+11963(Top 3%)907(Top 6%)907(Top 16%)
Half13.11 mi0.68 mi960-15905-16905-161241(Top 4%)1175(Top 7%)1175(Top 21%)
25K15.53 mi2.42 mi961-1907-2907-21100(Top 4%)1036(Top 6%)1036(Top 18%)
30K18.64 mi3.11 mi953+8898+9898+91103(Top 4%)1038(Top 6%)1038(Top 18%)
20M20.00 mi1.36 mi944+9888+10888+101196(Top 4%)1127(Top 7%)1127(Top 20%)
21M21.00 mi1.00 mi922+22867+21867+21860(Top 3%)812(Top 5%)812(Top 14%)
35K21.75 mi0.75 mi903+19848+19848+19951(Top 3%)894(Top 6%)894(Top 16%)
23M23.00 mi1.25 mi904-18488481028(Top 4%)971(Top 6%)971(Top 17%)
24M24.00 mi1.00 mi897+7840+8840+81009(Top 4%)948(Top 6%)948(Top 17%)
40K24.85 mi0.85 mi878+19823+17823+17813(Top 3%)762(Top 5%)762(Top 14%)
25.2M25.20 mi0.35 mi872+6817+6817+6984(Top 3%)902(Top 6%)902(Top 16%)
Finish26.22 mi1.02 mi850+22794+23794+23997(Top 4%)935(Top 6%)935(Top 17%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 3%
×21story building
+97ft-345ft

Overall

972

Males

919

M18-39

919

5K→10K

3.1 - 6.2 mi

Top 3%
×5story building
+79ft-138ft

Overall

946

Males

891

M18-39

891

10K→15K

6.2 - 9.3 mi

Top 3%
×3story building
+67ft-78ft

Overall

972

Males

919

M18-39

919

15K→20K

9.3 - 12.4 mi

Top 3%
×5story building
+106ft-86ft

Overall

963

Males

907

M18-39

907

20K→Half

12.4 - 13.1 mi

Top 4%
×2story building
+19ft-37ft

Overall

1241

Males

1175

M18-39

1175

Half→25K

13.1 - 15.5 mi

Top 4%
×4story building
+66ft-88ft

Overall

1100

Males

1036

M18-39

1036

25K→30K

15.5 - 18.6 mi

Top 4%
×9story building
+181ft-148ft

Overall

1103

Males

1038

M18-39

1038

30K→20M

18.6 - 20.0 mi

Top 4%
×5story building
+64ft-50ft

Overall

1196

Males

1127

M18-39

1127

20M→21M

20.0 - 21.0 mi

Top 3%
×8story building
+106ft-24ft

Overall

860

Males

812

M18-39

812

21M→35K

21.0 - 21.8 mi

Top 3%
×7story building
+17ft-86ft

Overall

951

Males

894

M18-39

894

35K→23M

21.8 - 23.0 mi

Top 4%
×5story building
+23ft-63ft

Overall

1028

Males

971

M18-39

971

23M→24M

23.0 - 24.0 mi

Top 4%
×6story building
+12ft-82ft

Overall

1009

Males

948

M18-39

948

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

813

Males

762

M18-39

762

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

984

Males

902

M18-39

902

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2story building
+22ft-21ft

Overall

997

Males

935

M18-39

935

Passing Analysis

Category:
Athletes Passed
383
Passed By
260
Net Change
+123
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#973
5K → 10K5938+21#973#952
10K → 15K2327-4#952#956
15K → 20K3726+11#956#945
20K → Half217-15#945#960
Half → 25K2728-1#960#961
25K → 30K4335+8#961#953
30K → 20M3122+9#953#944
20M → 21M3513+22#944#922
21M → 35K245+19#922#903
35K → 23M1617-1#903#904
23M → 24M1811+7#904#897
24M → 40K2910+19#897#878
40K → 25.2M104+6#878#872
25.2M → Finish297+22#872#850
TOTALS383260+123
📊

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