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BOSTON MARATHON 2025

Yoonsung Son

Bib: 23932•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M65-69)
#0 / 639
Top 8%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:25
Rank: #17971
Start → 5K
25:25 | 8:11/mi
10K· 6.21 mi
50:19
Rank: #17230 (+741)
5K → 10K
24:54 | 8:01/mi
15K· 9.32 mi
1:15:27
Rank: #17034 (+196)
10K → 15K
25:08 | 8:05/mi
20K· 12.43 mi
1:40:29
Rank: #16564 (+470)
15K → 20K
25:02 | 8:03/mi
Half· 13.11 mi
1:45:51
Rank: #16484 (+80)
20K → Half
5:22 | 7:52/mi
25K· 15.53 mi
2:04:39
Rank: #15741 (+743)
Half → 25K
18:48 | 7:45/mi
30K· 18.64 mi
2:29:49
Rank: #15015 (+726)
25K → 30K
25:10 | 8:06/mi
20M
2:41:14
Rank: #14837 (+178)
30K → 20M
11:25 | 8:24/mi
21M
2:49:53
Rank: #14596 (+241)
20M → 21M
8:39 | 8:39/mi
35K· 21.75 mi
2:55:51
Rank: #14471 (+125)
21M → 35K
5:58 | 7:59/mi
23M
3:06:37
Rank: #14420 (+51)
35K → 23M
10:46 | 8:36/mi
24M
3:14:55
Rank: #14344 (+76)
23M → 24M
8:18 | 8:18/mi
40K· 24.85 mi
3:22:09
Rank: #14280 (+64)
24M → 40K
7:14 | 8:28/mi
25.2M
3:25:25
Rank: #14272 (+8)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:33:52
Rank: #14247 (+25)
25.2M → Finish
8:27 | 8:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:51
Pace8:04 /mi
2nd Half
Distance13.11 mi
Time1:48:01
Pace8:14 /mi
📊Positive Split: 2.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:0825:258:1125:25
8:11
-
10K
6.21 mi11:48:0250:198:0624:54
8:01
-0:10
15K
9.32 mi12:13:101:15:278:0625:08
8:05
+0:04
20K
12.43 mi12:38:121:40:298:0525:02
8:03
-0:02
Half
13.11 mi12:43:341:45:518:045:22
7:52
-0:11
25K
15.53 mi13:02:222:04:398:0118:48
7:45
-0:07
30K
18.64 mi13:27:322:29:498:0225:10
8:06
+0:21
20M
20.00 mi13:38:572:41:148:0411:25
8:24
+0:18
21M
21.00 mi13:47:362:49:538:058:39
8:39
+0:15
35K
21.75 mi13:53:342:55:518:055:58
7:59
-0:40
23M
23.00 mi14:04:203:06:378:0710:46
8:36
+0:37
24M
24.00 mi14:12:383:14:558:078:18
8:18
-0:18
40K
24.85 mi14:19:523:22:098:087:14
8:28
+0:10
25.2M
25.20 mi14:23:083:25:258:093:16
9:28
+1:00
Finish
26.22 mi14:31:353:33:528:108:27
8:18
-1:10

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

8:10 /mi

Slowest Pace

9:28 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

24:10

11% of race

Time at Steady Pace

2:28:22

69% of race

Time at Slower Pace

41:20

19% of race

Average Pace: 8:09 /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 mi11:23:0825:258:1125:25
8:11
#17971
10K
6.21 mi11:48:0250:198:0624:54
8:01
#17230
15K
9.32 mi12:13:101:15:278:0625:08
8:05
#17034
20K
12.43 mi12:38:121:40:298:0525:02
8:03
#16564
Half
13.11 mi12:43:341:45:518:045:22
7:52
#16484
25K
15.53 mi13:02:222:04:398:0118:48
7:45
#15741
30K
18.64 mi13:27:322:29:498:0225:10
8:06
#15015
20M
20.00 mi13:38:572:41:148:0411:25
8:24
#14837
21M
21.00 mi13:47:362:49:538:058:39
8:39
#14596
35K
21.75 mi13:53:342:55:518:055:58
7:59
#14471
23M
23.00 mi14:04:203:06:378:0710:46
8:36
#14420
24M
24.00 mi14:12:383:14:558:078:18
8:18
#14344
40K
24.85 mi14:19:523:22:098:087:14
8:28
#14280
25.2M
25.20 mi14:23:083:25:258:093:16
9:28
#14272
Finish
26.22 mi14:31:353:33:528:108:27
8:18
#14247
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM65-69Seg. OverallSeg. MalesSeg. M65-69
5K3.11 mi3.11 mi17971115851158516655(Top 59%)11070(Top 69%)11070(Top 1732%)
10K6.21 mi3.10 mi17230+74111314+27111314+27116572(Top 58%)11056(Top 69%)11056(Top 1730%)
15K9.32 mi3.11 mi17034+19611247+6711247+6716655(Top 59%)11070(Top 69%)11070(Top 1732%)
20K12.43 mi3.11 mi16564+47011037+21011037+21015318(Top 54%)10459(Top 65%)10459(Top 1637%)
Half13.11 mi0.68 mi16484+8011004+3311004+3314716(Top 52%)10192(Top 63%)10192(Top 1595%)
25K15.53 mi2.42 mi15741+74310675+32910675+32911948(Top 42%)8820(Top 55%)8820(Top 1380%)
30K18.64 mi3.11 mi15015+72610294+38110294+38112083(Top 43%)8718(Top 54%)8718(Top 1364%)
20M20.00 mi1.36 mi14837+17810191+10310191+10313121(Top 46%)9032(Top 56%)9032(Top 1413%)
21M21.00 mi1.00 mi14596+24110056+13510056+13511333(Top 40%)8031(Top 50%)8031(Top 1257%)
35K21.75 mi0.75 mi14471+1259993+639993+6312037(Top 42%)8317(Top 52%)8317(Top 1302%)
23M23.00 mi1.25 mi14420+519930+639930+6313878(Top 49%)9093(Top 56%)9093(Top 1423%)
24M24.00 mi1.00 mi14344+769873+579873+5713203(Top 46%)8729(Top 54%)8729(Top 1366%)
40K24.85 mi0.85 mi14280+649808+659808+6513114(Top 46%)8557(Top 53%)8557(Top 1339%)
25.2M25.20 mi0.35 mi14272+89799+99799+914310(Top 50%)9043(Top 56%)9043(Top 1415%)
Finish26.22 mi1.02 mi14247+259756+439756+4314819(Top 52%)9390(Top 58%)9390(Top 1469%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21stories
+97ft-345ft

Overall

16655

Males

11070

M65-69

11070

5K→10K

3.1 - 6.2 mi

Top 58%
×5stories
+79ft-138ft

Overall

16572

Males

11056

M65-69

11056

10K→15K

6.2 - 9.3 mi

Top 59%
×3stories
+67ft-78ft

Overall

16655

Males

11070

M65-69

11070

15K→20K

9.3 - 12.4 mi

Top 54%
×5stories
+106ft-86ft

Overall

15318

Males

10459

M65-69

10459

20K→Half

12.4 - 13.1 mi

Top 52%
×2stories
+19ft-37ft

Overall

14716

Males

10192

M65-69

10192

Half→25K

13.1 - 15.5 mi

Top 42%
×4stories
+66ft-88ft

Overall

11948

Males

8820

M65-69

8820

25K→30K

15.5 - 18.6 mi

Top 43%
×9stories
+181ft-148ft

Overall

12083

Males

8718

M65-69

8718

30K→20M

18.6 - 20.0 mi

Top 46%
×5stories
+64ft-50ft

Overall

13121

Males

9032

M65-69

9032

20M→21M

20.0 - 21.0 mi

Top 40%
×8stories
+106ft-24ft

Overall

11333

Males

8031

M65-69

8031

21M→35K

21.0 - 21.8 mi

Top 42%
×7stories
+17ft-86ft

Overall

12037

Males

8317

M65-69

8317

35K→23M

21.8 - 23.0 mi

Top 49%
×5stories
+23ft-63ft

Overall

13878

Males

9093

M65-69

9093

23M→24M

23.0 - 24.0 mi

Top 46%
×6stories
+12ft-82ft

Overall

13203

Males

8729

M65-69

8729

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13114

Males

8557

M65-69

8557

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

14310

Males

9043

M65-69

9043

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

14819

Males

9390

M65-69

9390

Passing Analysis

Category:
Athletes Passed
4244
Passed By
520
Net Change
+3724
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17971
5K → 10K80362+741#17971#17230
10K → 15K308112+196#17230#17034
15K → 20K49929+470#17034#16564
20K → Half899+80#16564#16484
Half → 25K7441+743#16484#15741
25K → 30K7326+726#15741#15015
30K → 20M22143+178#15015#14837
20M → 21M25413+241#14837#14596
21M → 35K13813+125#14596#14471
35K → 23M12776+51#14471#14420
23M → 24M10630+76#14420#14344
24M → 40K9834+64#14344#14280
40K → 25.2M3628+8#14280#14272
25.2M → Finish8964+25#14272#14247
TOTALS4244520+3724
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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