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BOSTON MARATHON 2025

David Nerrow

Bib: 16687•M

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 47%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M55-59)
#0 / 1648
Top 39%
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
7:29/mi
23:16
↑ 97↓ 3451.5%
10K· 6.21 mi
8:00/mi
48:08
↑ 79↓ 1380.4%
15K· 9.32 mi
7:36/mi
1:11:45
↑ 67↓ 78
20K· 12.43 mi
7:45/mi
1:35:49
↑ 106↓ 860.1%
Half· 13.11 mi
7:39/mi
1:41:02
↑ 19↓ 370.5%
25K· 15.53 mi
7:42/mi
1:59:41
↑ 66↓ 880.2%
30K· 18.64 mi
8:03/mi
2:24:43
↑ 181↓ 1480.2%
20M
8:19/mi
2:36:01
↑ 64↓ 500.2%
21M
9:01/mi
2:45:02
↑ 106↓ 241.6%
35K· 21.75 mi
8:39/mi
2:51:30
↑ 17↓ 861.7%
23M
9:10/mi
3:02:59
↑ 23↓ 630.6%
24M
8:51/mi
3:11:50
↓ 821.3%
40K· 24.85 mi
8:49/mi
3:19:22
↓ 200.3%
25.2M
9:31/mi
3:22:39
↑ 13↓ 160.2%
Finish· 26.22 mi
8:09/mi
3:30:57
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:02
Pace7:42 /mi
2nd Half
Distance13.11 mi
Time1:49:55
Pace8:23 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:5323:167:2923:16
7:29
-
10K
6.21 mi11:21:4548:087:4524:52
8:00
+0:31
15K
9.32 mi11:45:221:11:457:4223:37
7:36
-0:24
20K
12.43 mi12:09:261:35:497:4324:04
7:45
+0:09
Half
13.11 mi12:14:391:41:027:425:13
7:39
-0:06
25K
15.53 mi12:33:181:59:417:4218:39
7:42
+0:03
30K
18.64 mi12:58:202:24:437:4625:02
8:03
+0:21
20M
20.00 mi13:09:382:36:017:4811:18
8:19
+0:16
21M
21.00 mi13:18:392:45:027:529:01
9:01
+0:42
35K
21.75 mi13:25:072:51:307:536:28
8:39
-0:22
23M
23.00 mi13:36:363:02:597:5711:29
9:10
+0:31
24M
24.00 mi13:45:273:11:508:008:51
8:51
-0:19
40K
24.85 mi13:52:593:19:228:017:32
8:49
-0:02
25.2M
25.20 mi13:56:163:22:398:033:17
9:31
+0:42
Finish
26.22 mi14:04:343:30:578:038:18
8:09
-1:22

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

7:29 /mi

Average Pace

8:03 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:49

45% of race

Time at Steady Pace

1:09:30

33% of race

Time at Slower Pace

46:38

22% of race

Average Pace: 8:03 /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 mi10:56:5323:167:2923:16
7:29
#12129
10K
6.21 mi11:21:4548:087:4524:52
8:00
#14291
15K
9.32 mi11:45:221:11:457:4223:37
7:36
#13718
20K
12.43 mi12:09:261:35:497:4324:04
7:45
#13452
Half
13.11 mi12:14:391:41:027:425:13
7:39
#13417
25K
15.53 mi12:33:181:59:417:4218:39
7:42
#13053
30K
18.64 mi12:58:202:24:437:4625:02
8:03
#12765
20M
20.00 mi13:09:382:36:017:4811:18
8:19
#12734
21M
21.00 mi13:18:392:45:027:529:01
9:01
#12772
35K
21.75 mi13:25:072:51:307:536:28
8:39
#12905
23M
23.00 mi13:36:363:02:597:5711:29
9:10
#13198
24M
24.00 mi13:45:273:11:508:008:51
8:51
#13348
40K
24.85 mi13:52:593:19:228:017:32
8:49
#13407
25.2M
25.20 mi13:56:163:22:398:033:17
9:31
#13430
Finish
26.22 mi14:04:343:30:578:038:18
8:09
#13461
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi121299233923312594(Top 44%)9345(Top 58%)9345(Top 567%)
10K6.21 mi3.10 mi14291-216210136-90310136-90316499(Top 58%)11027(Top 68%)11027(Top 669%)
15K9.32 mi3.11 mi13718+5739873+2639873+26312594(Top 44%)9345(Top 58%)9345(Top 567%)
20K12.43 mi3.11 mi13452+2669721+1529721+15212809(Top 45%)9335(Top 58%)9335(Top 566%)
Half13.11 mi0.68 mi13417+359700+219700+2112929(Top 46%)9436(Top 59%)9436(Top 573%)
25K15.53 mi2.42 mi13053+3649511+1899511+18911474(Top 40%)8617(Top 54%)8617(Top 523%)
30K18.64 mi3.11 mi12765+2889331+1809331+18011796(Top 42%)8578(Top 53%)8578(Top 521%)
20M20.00 mi1.36 mi12734+319269+629269+6212576(Top 44%)8808(Top 55%)8808(Top 534%)
21M21.00 mi1.00 mi12772-389254+159254+1513592(Top 48%)9148(Top 57%)9148(Top 555%)
35K21.75 mi0.75 mi12905-1339299-459299-4516279(Top 57%)10288(Top 64%)10288(Top 624%)
23M23.00 mi1.25 mi13198-2939377-789377-7817180(Top 60%)10585(Top 66%)10585(Top 642%)
24M24.00 mi1.00 mi13348-1509421-449421-4416558(Top 58%)10273(Top 64%)10273(Top 623%)
40K24.85 mi0.85 mi13407-599422-19422-115221(Top 54%)9532(Top 59%)9532(Top 578%)
25.2M25.20 mi0.35 mi13430-239419+39419+314636(Top 52%)9229(Top 57%)9229(Top 560%)
Finish26.22 mi1.02 mi13461-319411+89411+813885(Top 49%)8954(Top 56%)8954(Top 543%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 44%
×21story building
+97ft-345ft

Overall

12594

Males

9345

M55-59

9345

5K→10K

3.1 - 6.2 mi

Top 58%
×5story building
+79ft-138ft

Overall

16499

Males

11027

M55-59

11027

10K→15K

6.2 - 9.3 mi

Top 44%
×3story building
+67ft-78ft

Overall

12594

Males

9345

M55-59

9345

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

12809

Males

9335

M55-59

9335

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

12929

Males

9436

M55-59

9436

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11474

Males

8617

M55-59

8617

25K→30K

15.5 - 18.6 mi

Top 42%
×9story building
+181ft-148ft

Overall

11796

Males

8578

M55-59

8578

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12576

Males

8808

M55-59

8808

20M→21M

20.0 - 21.0 mi

Top 48%
×8story building
+106ft-24ft

Overall

13592

Males

9148

M55-59

9148

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

16279

Males

10288

M55-59

10288

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

17180

Males

10585

M55-59

10585

23M→24M

23.0 - 24.0 mi

Top 58%
×6story building
+12ft-82ft

Overall

16558

Males

10273

M55-59

10273

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

15221

Males

9532

M55-59

9532

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

14636

Males

9229

M55-59

9229

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

13885

Males

8954

M55-59

8954

Passing Analysis

Category:
Athletes Passed
2253
Passed By
3585
Net Change
-1332
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12129
5K → 10K82170-2162#12129#14291
10K → 15K60027+573#14291#13718
15K → 20K33064+266#13718#13452
20K → Half5520+35#13452#13417
Half → 25K38117+364#13417#13053
25K → 30K37688+288#13053#12765
30K → 20M134103+31#12765#12734
20M → 21M101139-38#12734#12772
21M → 35K25158-133#12772#12905
35K → 23M55348-293#12905#13198
23M → 24M38188-150#13198#13348
24M → 40K62121-59#13348#13407
40K → 25.2M2952-23#13407#13430
25.2M → Finish5990-31#13430#13461
TOTALS22533585-1332
📊

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