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BOSTON MARATHON 2025

Nelson Yeung

Bib: 28979•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
27:03
Rank: #21045
Start → 5K
27:03 | 8:42/mi
10K· 6.21 mi
54:30
Rank: #21285 (-240)
5K → 10K
27:27 | 8:50/mi
15K· 9.32 mi
1:22:02
Rank: #21271 (+14)
10K → 15K
27:32 | 8:52/mi
20K· 12.43 mi
1:50:00
Rank: #21186 (+85)
15K → 20K
27:58 | 9:00/mi
Half· 13.11 mi
1:56:04
Rank: #21192 (-6)
20K → Half
6:04 | 8:54/mi
25K· 15.53 mi
2:19:14
Rank: #21391 (-199)
Half → 25K
23:10 | 9:33/mi
30K· 18.64 mi
2:49:39
Rank: #21340 (+51)
25K → 30K
30:25 | 9:47/mi
20M
3:04:27
Rank: #21558 (-218)
30K → 20M
14:48 | 10:53/mi
21M
3:16:38
Rank: #21765 (-207)
20M → 21M
12:11 | 12:11/mi
35K· 21.75 mi
3:24:35
Rank: #21856 (-91)
21M → 35K
7:57 | 10:38/mi
23M
3:38:15
Rank: #21919 (-63)
35K → 23M
13:40 | 10:55/mi
24M
3:48:39
Rank: #21938 (-19)
23M → 24M
10:24 | 10:24/mi
40K· 24.85 mi
3:57:52
Rank: #21967 (-29)
24M → 40K
9:13 | 10:47/mi
25.2M
4:02:03
Rank: #21991 (-24)
40K → 25.2M
4:11 | 12:08/mi
Finish· 26.22 mi
4:12:22
Rank: #22037 (-46)
25.2M → Finish
10:19 | 10:07/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:56:04
Pace8:51 /mi
2nd Half
Distance13.11 mi
Time2:16:18
Pace10:24 /mi
📊Positive Split: 17.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:5027:038:4227:03
8:42
-
10K
6.21 mi12:17:1754:308:4627:27
8:50
+0:08
15K
9.32 mi12:44:491:22:028:4827:32
8:52
+0:02
20K
12.43 mi13:12:471:50:008:5127:58
9:00
+0:08
Half
13.11 mi13:18:511:56:048:516:04
8:54
-0:06
25K
15.53 mi13:42:012:19:148:5823:10
9:33
+0:39
30K
18.64 mi14:12:262:49:399:0630:25
9:47
+0:14
20M
20.00 mi14:27:143:04:279:1314:48
10:53
+1:06
21M
21.00 mi14:39:253:16:389:2212:11
12:11
+1:18
35K
21.75 mi14:47:223:24:359:247:57
10:38
-1:33
23M
23.00 mi15:01:023:38:159:2913:40
10:55
+0:17
24M
24.00 mi15:11:263:48:399:3210:24
10:24
-0:31
40K
24.85 mi15:20:393:57:529:349:13
10:47
+0:23
25.2M
25.20 mi15:24:504:02:039:364:11
12:08
+1:21
Finish
26.22 mi15:35:094:12:229:3810:19
10:07
-2:01

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

8:42 /mi

Average Pace

9:38 /mi

Slowest Pace

12:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:19:14

55% of race

Time at Steady Pace

59:05

23% of race

Time at Slower Pace

54:03

21% of race

Average Pace: 9:37 /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 mi11:49:5027:038:4227:03
8:42
#21045
10K
6.21 mi12:17:1754:308:4627:27
8:50
#21285
15K
9.32 mi12:44:491:22:028:4827:32
8:52
#21271
20K
12.43 mi13:12:471:50:008:5127:58
9:00
#21186
Half
13.11 mi13:18:511:56:048:516:04
8:54
#21192
25K
15.53 mi13:42:012:19:148:5823:10
9:33
#21391
30K
18.64 mi14:12:262:49:399:0630:25
9:47
#21340
20M
20.00 mi14:27:143:04:279:1314:48
10:53
#21558
21M
21.00 mi14:39:253:16:389:2212:11
12:11
#21765
35K
21.75 mi14:47:223:24:359:247:57
10:38
#21856
23M
23.00 mi15:01:023:38:159:2913:40
10:55
#21919
24M
24.00 mi15:11:263:48:399:3210:24
10:24
#21938
40K
24.85 mi15:20:393:57:529:349:13
10:47
#21967
25.2M
25.20 mi15:24:504:02:039:364:11
12:08
#21991
Finish
26.22 mi15:35:094:12:229:3810:19
10:07
#22037
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi21045128801288021342(Top 75%)13097(Top 81%)13097(Top 549%)
10K6.21 mi3.10 mi21285-24013018-13813018-13821569(Top 76%)13158(Top 82%)13158(Top 551%)
15K9.32 mi3.11 mi21271+1413026-813026-821342(Top 75%)13097(Top 81%)13097(Top 549%)
20K12.43 mi3.11 mi21186+8512992+3412992+3420973(Top 74%)12879(Top 80%)12879(Top 540%)
Half13.11 mi0.68 mi21192-612999-712999-721335(Top 75%)13065(Top 81%)13065(Top 548%)
25K15.53 mi2.42 mi21391-19913065-6613065-6622049(Top 78%)13314(Top 83%)13314(Top 558%)
30K18.64 mi3.11 mi21340+5113011+5413011+5420962(Top 74%)12697(Top 79%)12697(Top 532%)
20M20.00 mi1.36 mi21558-21813106-9513106-9523357(Top 82%)13695(Top 85%)13695(Top 574%)
21M21.00 mi1.00 mi21765-20713171-6513171-6523897(Top 84%)13861(Top 86%)13861(Top 581%)
35K21.75 mi0.75 mi21856-9113200-2913200-2923415(Top 82%)13593(Top 84%)13593(Top 570%)
23M23.00 mi1.25 mi21919-6313189+1113189+1123026(Top 81%)13350(Top 83%)13350(Top 560%)
24M24.00 mi1.00 mi21938-1913175+1413175+1422527(Top 79%)13069(Top 81%)13069(Top 548%)
40K24.85 mi0.85 mi21967-2913173+213173+222627(Top 80%)13052(Top 81%)13052(Top 547%)
25.2M25.20 mi0.35 mi21991-2413176-313176-323481(Top 83%)13512(Top 84%)13512(Top 566%)
Finish26.22 mi1.02 mi22037-4613181-513181-523289(Top 82%)13416(Top 83%)13416(Top 562%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 75%
×21stories
+97ft-345ft

Overall

21342

Males

13097

M45-49

13097

5K→10K

3.1 - 6.2 mi

Top 76%
×5stories
+79ft-138ft

Overall

21569

Males

13158

M45-49

13158

10K→15K

6.2 - 9.3 mi

Top 75%
×3stories
+67ft-78ft

Overall

21342

Males

13097

M45-49

13097

15K→20K

9.3 - 12.4 mi

Top 74%
×5stories
+106ft-86ft

Overall

20973

Males

12879

M45-49

12879

20K→Half

12.4 - 13.1 mi

Top 75%
×2stories
+19ft-37ft

Overall

21335

Males

13065

M45-49

13065

Half→25K

13.1 - 15.5 mi

Top 78%
×4stories
+66ft-88ft

Overall

22049

Males

13314

M45-49

13314

25K→30K

15.5 - 18.6 mi

Top 74%
×9stories
+181ft-148ft

Overall

20962

Males

12697

M45-49

12697

30K→20M

18.6 - 20.0 mi

Top 82%
×5stories
+64ft-50ft

Overall

23357

Males

13695

M45-49

13695

20M→21M

20.0 - 21.0 mi

Top 84%
×8stories
+106ft-24ft

Overall

23897

Males

13861

M45-49

13861

21M→35K

21.0 - 21.8 mi

Top 82%
×7stories
+17ft-86ft

Overall

23415

Males

13593

M45-49

13593

35K→23M

21.8 - 23.0 mi

Top 81%
×5stories
+23ft-63ft

Overall

23026

Males

13350

M45-49

13350

23M→24M

23.0 - 24.0 mi

Top 79%
×6stories
+12ft-82ft

Overall

22527

Males

13069

M45-49

13069

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22627

Males

13052

M45-49

13052

40K→25.2M

24.9 - 25.2 mi

Top 83%
×1story
+13ft-16ft

Overall

23481

Males

13512

M45-49

13512

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2stories
+22ft-21ft

Overall

23289

Males

13416

M45-49

13416

Passing Analysis

Category:
Athletes Passed
1268
Passed By
2260
Net Change
-992
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21045
5K → 10K179419-240#21045#21285
10K → 15K220206+14#21285#21271
15K → 20K233148+85#21271#21186
20K → Half2834-6#21186#21192
Half → 25K93292-199#21192#21391
25K → 30K216165+51#21391#21340
30K → 20M45263-218#21340#21558
20M → 21M34241-207#21558#21765
21M → 35K23114-91#21765#21856
35K → 23M64127-63#21856#21919
23M → 24M4766-19#21919#21938
24M → 40K3564-29#21938#21967
40K → 25.2M1842-24#21967#21991
25.2M → Finish3379-46#21991#22037
TOTALS12682260-992
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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