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BOSTON MARATHON 2025

Peter Nam

Bib: 12580•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
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
7:57/mi
49:21
↑ 79↓ 1380.4%
15K· 9.32 mi
8:26/mi
1:15:33
↑ 67↓ 78
20K· 12.43 mi
9:33/mi
1:45:12
↑ 106↓ 860.1%
Half· 13.11 mi
9:11/mi
1:51:28
↑ 19↓ 370.5%
25K· 15.53 mi
9:58/mi
2:15:38
↑ 66↓ 880.2%
30K· 18.64 mi
11:32/mi
2:51:29
↑ 181↓ 1480.2%
20M
13:26/mi
3:09:44
↑ 64↓ 500.2%
21M
14:31/mi
3:24:15
↑ 106↓ 241.6%
35K· 21.75 mi
13:23/mi
3:34:16
↑ 17↓ 861.7%
23M
16:53/mi
3:55:24
↑ 23↓ 630.6%
24M
17:18/mi
4:12:42
↓ 821.3%
40K· 24.85 mi
18:39/mi
4:28:39
↓ 200.3%
25.2M
19:17/mi
4:35:18
↑ 13↓ 160.2%
Finish· 26.22 mi
14:17/mi
4:49:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:28
Pace8:30 /mi
2nd Half
Distance13.11 mi
Time2:58:23
Pace13:36 /mi
📊Positive Split: 60.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4024:407:5624:40
7:56
-
10K
6.21 mi11:17:2149:217:5724:41
7:57
+0:01
15K
9.32 mi11:43:331:15:338:0626:12
8:26
+0:29
20K
12.43 mi12:13:121:45:128:2829:39
9:33
+1:07
Half
13.11 mi12:19:281:51:288:306:16
9:11
-0:22
25K
15.53 mi12:43:382:15:388:4424:10
9:58
+0:47
30K
18.64 mi13:19:292:51:299:1235:51
11:32
+1:34
20M
20.00 mi13:37:443:09:449:2918:15
13:26
+1:54
21M
21.00 mi13:52:153:24:159:4414:31
14:31
+1:05
35K
21.75 mi14:02:163:34:169:5110:01
13:23
-1:08
23M
23.00 mi14:23:243:55:2410:1421:08
16:53
+3:30
24M
24.00 mi14:40:424:12:4210:3217:18
17:18
+0:25
40K
24.85 mi14:56:394:28:3910:4915:57
18:39
+1:21
25.2M
25.20 mi15:03:184:35:1810:556:39
19:17
+0:38
Finish
26.22 mi15:17:514:49:5111:0414:33
14:17
-5:00

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

7:56 /mi

Average Pace

11:04 /mi

Slowest Pace

19:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:15:38

47% of race

Time at Steady Pace

1:33:11

32% of race

Time at Slower Pace

1:01:02

21% of race

Average Pace: 11:03 /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 mi10:52:4024:407:5624:40
7:56
#16095
10K
6.21 mi11:17:2149:217:5724:41
7:57
#16036
15K
9.32 mi11:43:331:15:338:0626:12
8:26
#17129
20K
12.43 mi12:13:121:45:128:2829:39
9:33
#19043
Half
13.11 mi12:19:281:51:288:306:16
9:11
#19272
25K
15.53 mi12:43:382:15:388:4424:10
9:58
#20253
30K
18.64 mi13:19:292:51:299:1235:51
11:32
#21751
20M
20.00 mi13:37:443:09:449:2918:15
13:26
#22515
21M
21.00 mi13:52:153:24:159:4414:31
14:31
#22942
35K
21.75 mi14:02:163:34:169:5110:01
13:23
#23225
23M
23.00 mi14:23:243:55:2410:1421:08
16:53
#24084
24M
24.00 mi14:40:424:12:4210:3217:18
17:18
#24664
40K
24.85 mi14:56:394:28:3910:4915:57
18:39
#25125
25.2M
25.20 mi15:03:184:35:1810:556:39
19:17
#25258
Finish
26.22 mi15:17:514:49:5111:0414:33
14:17
#25504
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi16095108501085018913(Top 67%)12014(Top 75%)12014(Top 602%)
10K6.21 mi3.10 mi16036+5910831+1910831+1916029(Top 56%)10852(Top 67%)10852(Top 544%)
15K9.32 mi3.11 mi17129-109311293-46211293-46218913(Top 67%)12014(Top 75%)12014(Top 602%)
20K12.43 mi3.11 mi19043-191412058-76512058-76523034(Top 81%)13805(Top 86%)13805(Top 692%)
Half13.11 mi0.68 mi19272-22912150-9212150-9222540(Top 79%)13586(Top 84%)13586(Top 681%)
25K15.53 mi2.42 mi20253-98112566-41612566-41623176(Top 82%)13829(Top 86%)13829(Top 693%)
30K18.64 mi3.11 mi21751-149813211-64513211-64524911(Top 88%)14495(Top 90%)14495(Top 726%)
20M20.00 mi1.36 mi22515-76413514-30313514-30326823(Top 94%)15292(Top 95%)15292(Top 766%)
21M21.00 mi1.00 mi22942-42713684-17013684-17026722(Top 94%)15225(Top 95%)15225(Top 763%)
35K21.75 mi0.75 mi23225-28313810-12613810-12627287(Top 96%)15483(Top 96%)15483(Top 776%)
23M23.00 mi1.25 mi24084-85914184-37414184-37428263(Top 100%)16010(Top 99%)16010(Top 802%)
24M24.00 mi1.00 mi24664-58014441-25714441-25728325(Top 100%)16051(Top 100%)16051(Top 804%)
40K24.85 mi0.85 mi25125-46114645-20414645-20428349(Top 100%)16068(Top 100%)16068(Top 805%)
25.2M25.20 mi0.35 mi25258-13314702-5714702-5728326(Top 100%)16049(Top 100%)16049(Top 804%)
Finish26.22 mi1.02 mi25504-24614798-9614798-9628126(Top 99%)15917(Top 99%)15917(Top 797%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

18913

Males

12014

M50-54

12014

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

16029

Males

10852

M50-54

10852

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

18913

Males

12014

M50-54

12014

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

23034

Males

13805

M50-54

13805

20K→Half

12.4 - 13.1 mi

Top 79%
×2story building
+19ft-37ft

Overall

22540

Males

13586

M50-54

13586

Half→25K

13.1 - 15.5 mi

Top 82%
×4story building
+66ft-88ft

Overall

23176

Males

13829

M50-54

13829

25K→30K

15.5 - 18.6 mi

Top 88%
×9story building
+181ft-148ft

Overall

24911

Males

14495

M50-54

14495

30K→20M

18.6 - 20.0 mi

Top 94%
×5story building
+64ft-50ft

Overall

26823

Males

15292

M50-54

15292

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

26722

Males

15225

M50-54

15225

21M→35K

21.0 - 21.8 mi

Top 96%
×7story building
+17ft-86ft

Overall

27287

Males

15483

M50-54

15483

35K→23M

21.8 - 23.0 mi

Top 100%
×5story building
+23ft-63ft

Overall

28263

Males

16010

M50-54

16010

23M→24M

23.0 - 24.0 mi

Top 100%
×6story building
+12ft-82ft

Overall

28325

Males

16051

M50-54

16051

24M→40K

24.0 - 24.9 mi

Top 100%
×1story
+6ft-20ft

Overall

28349

Males

16068

M50-54

16068

40K→25.2M

24.9 - 25.2 mi

Top 100%
×1story
+13ft-16ft

Overall

28326

Males

16049

M50-54

16049

25.2M→Finish

25.2 - 26.2 mi

Top 99%
×2story building
+22ft-21ft

Overall

28126

Males

15917

M50-54

15917

Passing Analysis

Category:
Athletes Passed
487
Passed By
9896
Net Change
-9409
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16095
5K → 10K340281+59#16095#16036
10K → 15K431136-1093#16036#17129
15K → 20K121926-1914#17129#19043
20K → Half4233-229#19043#19272
Half → 25K241005-981#19272#20253
25K → 30K251523-1498#20253#21751
30K → 20M11775-764#21751#22515
20M → 21M10437-427#22515#22942
21M → 35K8291-283#22942#23225
35K → 23M8867-859#23225#24084
23M → 24M1581-580#24084#24664
24M → 40K0461-461#24664#25125
40K → 25.2M0133-133#25125#25258
25.2M → Finish1247-246#25258#25504
TOTALS4879896-9409
📊

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