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BOSTON MARATHON 2025

Brendon Duffy

Bib: 28198•M

MA

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
7:56/mi
24:40
↑ 97↓ 3451.5%
10K· 6.21 mi
7:45/mi
48:45
↑ 79↓ 1380.4%
15K· 9.32 mi
7:53/mi
1:13:16
↑ 67↓ 78
20K· 12.43 mi
8:07/mi
1:38:28
↑ 106↓ 860.1%
Half· 13.11 mi
7:46/mi
1:43:46
↑ 19↓ 370.5%
25K· 15.53 mi
8:09/mi
2:03:32
↑ 66↓ 880.2%
30K· 18.64 mi
8:37/mi
2:30:18
↑ 181↓ 1480.2%
20M
8:47/mi
2:42:14
↑ 64↓ 500.2%
21M
9:19/mi
2:51:33
↑ 106↓ 241.6%
35K· 21.75 mi
8:17/mi
2:57:45
↑ 17↓ 861.7%
23M
8:30/mi
3:08:23
↑ 23↓ 630.6%
24M
8:28/mi
3:16:51
↓ 821.3%
40K· 24.85 mi
8:46/mi
3:24:21
↓ 200.3%
25.2M
9:20/mi
3:27:34
↑ 13↓ 160.2%
Finish· 26.22 mi
8:22/mi
3:36:06
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:46
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time1:52:20
Pace8:34 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:2824:407:5624:40
7:56
-
10K
6.21 mi12:06:3348:457:5124:05
7:45
-0:11
15K
9.32 mi12:31:041:13:167:5224:31
7:53
+0:08
20K
12.43 mi12:56:161:38:287:5525:12
8:07
+0:14
Half
13.11 mi13:01:341:43:467:555:18
7:46
-0:21
25K
15.53 mi13:21:202:03:327:5719:46
8:09
+0:23
30K
18.64 mi13:48:062:30:188:0426:46
8:37
+0:28
20M
20.00 mi14:00:022:42:148:0711:56
8:47
+0:10
21M
21.00 mi14:09:212:51:338:109:19
9:19
+0:32
35K
21.75 mi14:15:332:57:458:106:12
8:17
-1:02
23M
23.00 mi14:26:113:08:238:1110:38
8:30
+0:13
24M
24.00 mi14:34:393:16:518:128:28
8:28
-0:02
40K
24.85 mi14:42:093:24:218:137:30
8:46
+0:18
25.2M
25.20 mi14:45:223:27:348:143:13
9:20
+0:34
Finish
26.22 mi14:53:543:36:068:158:32
8:22
-0:58

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

7:45 /mi

Average Pace

8:15 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:46

48% of race

Time at Steady Pace

53:36

25% of race

Time at Slower Pace

58:44

27% of race

Average Pace: 8:15 /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 mi11:42:2824:407:5624:40
7:56
#16087
10K
6.21 mi12:06:3348:457:5124:05
7:45
#15196
15K
9.32 mi12:31:041:13:167:5224:31
7:53
#15168
20K
12.43 mi12:56:161:38:287:5525:12
8:07
#15304
Half
13.11 mi13:01:341:43:467:555:18
7:46
#15219
25K
15.53 mi13:21:202:03:327:5719:46
8:09
#15172
30K
18.64 mi13:48:062:30:188:0426:46
8:37
#15231
20M
20.00 mi14:00:022:42:148:0711:56
8:47
#15236
21M
21.00 mi14:09:212:51:338:109:19
9:19
#15165
35K
21.75 mi14:15:332:57:458:106:12
8:17
#15103
23M
23.00 mi14:26:113:08:238:1110:38
8:30
#14950
24M
24.00 mi14:34:393:16:518:128:28
8:28
#14896
40K
24.85 mi14:42:093:24:218:137:30
8:46
#14891
25.2M
25.20 mi14:45:223:27:348:143:13
9:20
#14855
Finish
26.22 mi14:53:543:36:068:158:32
8:22
#14863
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi16087108421084215151(Top 53%)10439(Top 65%)10439(Top 185%)
10K6.21 mi3.10 mi15196+89110494+34810494+34814333(Top 50%)10136(Top 63%)10136(Top 180%)
15K9.32 mi3.11 mi15168+2810464+3010464+3015151(Top 53%)10439(Top 65%)10439(Top 185%)
20K12.43 mi3.11 mi15304-13610505-4110505-4115699(Top 55%)10616(Top 66%)10616(Top 188%)
Half13.11 mi0.68 mi15219+8510467+3810467+3813951(Top 49%)9895(Top 61%)9895(Top 175%)
25K15.53 mi2.42 mi15172+4710422+4510422+4514982(Top 53%)10215(Top 63%)10215(Top 181%)
30K18.64 mi3.11 mi15231-5910398+2410398+2415474(Top 54%)10269(Top 64%)10269(Top 182%)
20M20.00 mi1.36 mi15236-510364+3410364+3415532(Top 55%)10168(Top 63%)10168(Top 180%)
21M21.00 mi1.00 mi15165+7110304+6010304+6015210(Top 54%)9870(Top 61%)9870(Top 175%)
35K21.75 mi0.75 mi15103+6210261+4310261+4314160(Top 50%)9357(Top 58%)9357(Top 166%)
23M23.00 mi1.25 mi14950+15310170+9110170+9113258(Top 47%)8816(Top 55%)8816(Top 156%)
24M24.00 mi1.00 mi14896+5410108+6210108+6214278(Top 50%)9277(Top 58%)9277(Top 164%)
40K24.85 mi0.85 mi14891+510081+2710081+2715007(Top 53%)9450(Top 59%)9450(Top 167%)
25.2M25.20 mi0.35 mi14855+3610056+2510056+2513568(Top 48%)8738(Top 54%)8738(Top 155%)
Finish26.22 mi1.02 mi14863-810026+3010026+3015372(Top 54%)9652(Top 60%)9652(Top 171%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

15151

Males

10439

M18-39

10439

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14333

Males

10136

M18-39

10136

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

15151

Males

10439

M18-39

10439

15K→20K

9.3 - 12.4 mi

Top 55%
×5story building
+106ft-86ft

Overall

15699

Males

10616

M18-39

10616

20K→Half

12.4 - 13.1 mi

Top 49%
×2story building
+19ft-37ft

Overall

13951

Males

9895

M18-39

9895

Half→25K

13.1 - 15.5 mi

Top 53%
×4story building
+66ft-88ft

Overall

14982

Males

10215

M18-39

10215

25K→30K

15.5 - 18.6 mi

Top 54%
×9story building
+181ft-148ft

Overall

15474

Males

10269

M18-39

10269

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15532

Males

10168

M18-39

10168

20M→21M

20.0 - 21.0 mi

Top 54%
×8story building
+106ft-24ft

Overall

15210

Males

9870

M18-39

9870

21M→35K

21.0 - 21.8 mi

Top 50%
×7story building
+17ft-86ft

Overall

14160

Males

9357

M18-39

9357

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13258

Males

8816

M18-39

8816

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

14278

Males

9277

M18-39

9277

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15007

Males

9450

M18-39

9450

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13568

Males

8738

M18-39

8738

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

15372

Males

9652

M18-39

9652

Passing Analysis

Category:
Athletes Passed
2682
Passed By
1458
Net Change
+1224
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16087
5K → 10K94756+891#16087#15196
10K → 15K229201+28#15196#15168
15K → 20K161297-136#15168#15304
20K → Half949+85#15304#15219
Half → 25K189142+47#15219#15172
25K → 30K222281-59#15172#15231
30K → 20M115120-5#15231#15236
20M → 21M14574+71#15236#15165
21M → 35K8725+62#15165#15103
35K → 23M19138+153#15103#14950
23M → 24M10147+54#14950#14896
24M → 40K7065+5#14896#14891
40K → 25.2M5620+36#14891#14855
25.2M → Finish7583-8#14855#14863
TOTALS26821458+1224
📊

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