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BOSTON MARATHON 2025

David Yim

Bib: 31057•M

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

Start
0:00:00
Race begins
5K· 3.11 mi
31:47
Rank: #26136
Start → 5K
31:47 | 10:14/mi
10K· 6.21 mi
1:03:54
Rank: #26068 (+68)
5K → 10K
32:07 | 10:20/mi
15K· 9.32 mi
1:36:47
Rank: #26057 (+11)
10K → 15K
32:53 | 10:35/mi
20K· 12.43 mi
2:11:03
Rank: #26056 (+1)
15K → 20K
34:16 | 11:02/mi
Half· 13.11 mi
2:18:26
Rank: #26070 (-14)
20K → Half
7:23 | 10:49/mi
25K· 15.53 mi
2:45:33
Rank: #25975 (+95)
Half → 25K
27:07 | 11:11/mi
30K· 18.64 mi
3:21:22
Rank: #25762 (+213)
25K → 30K
35:49 | 11:32/mi
20M
3:38:02
Rank: #25747 (+15)
30K → 20M
16:40 | 12:16/mi
21M
3:50:51
Rank: #25714 (+33)
20M → 21M
12:49 | 12:49/mi
35K· 21.75 mi
3:59:06
Rank: #25673 (+41)
21M → 35K
8:15 | 11:02/mi
23M
4:14:23
Rank: #25692 (-19)
35K → 23M
15:17 | 12:12/mi
24M
4:25:25
Rank: #25637 (+55)
23M → 24M
11:02 | 11:02/mi
40K· 24.85 mi
4:34:36
Rank: #25532 (+105)
24M → 40K
9:11 | 10:44/mi
25.2M
4:38:53
Rank: #25516 (+16)
40K → 25.2M
4:17 | 12:25/mi
Finish· 26.22 mi
4:49:49
Rank: #25500 (+16)
25.2M → Finish
10:56 | 10:44/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:18:26
Pace10:34 /mi
2nd Half
Distance13.11 mi
Time2:31:23
Pace11:33 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:54:2331:4710:1431:47
10:14
-
10K
6.21 mi12:26:301:03:5410:1732:07
10:20
+0:06
15K
9.32 mi12:59:231:36:4710:2332:53
10:35
+0:15
20K
12.43 mi13:33:392:11:0310:3334:16
11:02
+0:27
Half
13.11 mi13:41:022:18:2610:347:23
10:49
-0:13
25K
15.53 mi14:08:092:45:3310:3927:07
11:11
+0:22
30K
18.64 mi14:43:583:21:2210:4835:49
11:32
+0:21
20M
20.00 mi15:00:383:38:0210:5416:40
12:16
+0:44
21M
21.00 mi15:13:273:50:5111:0012:49
12:49
+0:33
35K
21.75 mi15:21:423:59:0611:008:15
11:02
-1:47
23M
23.00 mi15:36:594:14:2311:0415:17
12:12
+1:10
24M
24.00 mi15:48:014:25:2511:0411:02
11:02
-1:10
40K
24.85 mi15:57:124:34:3611:039:11
10:44
-0:18
25.2M
25.20 mi16:01:294:38:5311:044:17
12:25
+1:41
Finish
26.22 mi16:12:254:49:4911:0410:56
10:44
-1:41

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

10:14 /mi

Average Pace

11:04 /mi

Slowest Pace

12:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:47

33% of race

Time at Steady Pace

1:48:10

37% of race

Time at Slower Pace

1:24:52

29% 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 mi11:54:2331:4710:1431:47
10:14
#26136
10K
6.21 mi12:26:301:03:5410:1732:07
10:20
#26068
15K
9.32 mi12:59:231:36:4710:2332:53
10:35
#26057
20K
12.43 mi13:33:392:11:0310:3334:16
11:02
#26056
Half
13.11 mi13:41:022:18:2610:347:23
10:49
#26070
25K
15.53 mi14:08:092:45:3310:3927:07
11:11
#25975
30K
18.64 mi14:43:583:21:2210:4835:49
11:32
#25762
20M
20.00 mi15:00:383:38:0210:5416:40
12:16
#25747
21M
21.00 mi15:13:273:50:5111:0012:49
12:49
#25714
35K
21.75 mi15:21:423:59:0611:008:15
11:02
#25673
23M
23.00 mi15:36:594:14:2311:0415:17
12:12
#25692
24M
24.00 mi15:48:014:25:2511:0411:02
11:02
#25637
40K
24.85 mi15:57:124:34:3611:039:11
10:44
#25532
25.2M
25.20 mi16:01:294:38:5311:044:17
12:25
#25516
Finish
26.22 mi16:12:254:49:4911:0410:56
10:44
#25500
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi26136152381523826069(Top 92%)15177(Top 94%)15177(Top 760%)
10K6.21 mi3.10 mi26068+6815193+4515193+4525987(Top 91%)15139(Top 94%)15139(Top 758%)
15K9.32 mi3.11 mi26057+1115181+1215181+1226069(Top 92%)15177(Top 94%)15177(Top 760%)
20K12.43 mi3.11 mi26056+115175+615175+626052(Top 92%)15145(Top 94%)15145(Top 759%)
Half13.11 mi0.68 mi26070-1415177-215177-226290(Top 93%)15229(Top 95%)15229(Top 763%)
25K15.53 mi2.42 mi25975+9515125+5215125+5225455(Top 90%)14844(Top 92%)14844(Top 744%)
30K18.64 mi3.11 mi25762+21314998+12714998+12724889(Top 88%)14482(Top 90%)14482(Top 726%)
20M20.00 mi1.36 mi25747+1514979+1914979+1925617(Top 90%)14742(Top 92%)14742(Top 739%)
21M21.00 mi1.00 mi25714+3314949+3014949+3024817(Top 87%)14285(Top 89%)14285(Top 716%)
35K21.75 mi0.75 mi25673+4114925+2414925+2424257(Top 85%)14007(Top 87%)14007(Top 702%)
23M23.00 mi1.25 mi25692-1914919+614919+625409(Top 89%)14535(Top 90%)14535(Top 728%)
24M24.00 mi1.00 mi25637+5514878+4114878+4124060(Top 85%)13856(Top 86%)13856(Top 694%)
40K24.85 mi0.85 mi25532+10514820+5814820+5822551(Top 79%)13021(Top 81%)13021(Top 652%)
25.2M25.20 mi0.35 mi25516+1614808+1214808+1224050(Top 85%)13799(Top 86%)13799(Top 691%)
Finish26.22 mi1.02 mi25500+1614797+1114797+1124799(Top 87%)14173(Top 88%)14173(Top 710%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21stories
+97ft-345ft

Overall

26069

Males

15177

M50-54

15177

5K→10K

3.1 - 6.2 mi

Top 91%
×5stories
+79ft-138ft

Overall

25987

Males

15139

M50-54

15139

10K→15K

6.2 - 9.3 mi

Top 92%
×3stories
+67ft-78ft

Overall

26069

Males

15177

M50-54

15177

15K→20K

9.3 - 12.4 mi

Top 92%
×5stories
+106ft-86ft

Overall

26052

Males

15145

M50-54

15145

20K→Half

12.4 - 13.1 mi

Top 93%
×2stories
+19ft-37ft

Overall

26290

Males

15229

M50-54

15229

Half→25K

13.1 - 15.5 mi

Top 90%
×4stories
+66ft-88ft

Overall

25455

Males

14844

M50-54

14844

25K→30K

15.5 - 18.6 mi

Top 88%
×9stories
+181ft-148ft

Overall

24889

Males

14482

M50-54

14482

30K→20M

18.6 - 20.0 mi

Top 90%
×5stories
+64ft-50ft

Overall

25617

Males

14742

M50-54

14742

20M→21M

20.0 - 21.0 mi

Top 87%
×8stories
+106ft-24ft

Overall

24817

Males

14285

M50-54

14285

21M→35K

21.0 - 21.8 mi

Top 85%
×7stories
+17ft-86ft

Overall

24257

Males

14007

M50-54

14007

35K→23M

21.8 - 23.0 mi

Top 89%
×5stories
+23ft-63ft

Overall

25409

Males

14535

M50-54

14535

23M→24M

23.0 - 24.0 mi

Top 85%
×6stories
+12ft-82ft

Overall

24060

Males

13856

M50-54

13856

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22551

Males

13021

M50-54

13021

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

24050

Males

13799

M50-54

13799

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2stories
+22ft-21ft

Overall

24799

Males

14173

M50-54

14173

Passing Analysis

Category:
Athletes Passed
1293
Passed By
657
Net Change
+636
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26136
5K → 10K201133+68#26136#26068
10K → 15K126115+11#26068#26057
15K → 20K117116+1#26057#26056
20K → Half2640-14#26056#26070
Half → 25K13641+95#26070#25975
25K → 30K23522+213#25975#25762
30K → 20M6146+15#25762#25747
20M → 21M6128+33#25747#25714
21M → 35K5413+41#25714#25673
35K → 23M3554-19#25673#25692
23M → 24M6914+55#25692#25637
24M → 40K1061+105#25637#25532
40K → 25.2M2812+16#25532#25516
25.2M → Finish3822+16#25516#25500
TOTALS1293657+636
📊

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