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BOSTON MARATHON 2025

Deng-Song Chiou

Bib: 29661•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
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
9:36/mi
29:49
↑ 97↓ 3451.5%
10K· 6.21 mi
9:03/mi
57:55
↑ 79↓ 1380.4%
15K· 9.32 mi
9:04/mi
1:26:04
↑ 67↓ 78
20K· 12.43 mi
9:22/mi
1:55:11
↑ 106↓ 860.1%
Half· 13.11 mi
9:21/mi
2:01:34
↑ 19↓ 370.5%
25K· 15.53 mi
9:37/mi
2:24:53
↑ 66↓ 880.2%
30K· 18.64 mi
9:59/mi
2:55:53
↑ 181↓ 1480.2%
20M
9:44/mi
3:09:07
↑ 64↓ 500.2%
21M
10:52/mi
3:19:59
↑ 106↓ 241.6%
35K· 21.75 mi
10:14/mi
3:27:38
↑ 17↓ 861.7%
23M
10:09/mi
3:40:21
↑ 23↓ 630.6%
24M
9:57/mi
3:50:18
↓ 821.3%
40K· 24.85 mi
9:52/mi
3:58:44
↓ 200.3%
25.2M
10:58/mi
4:02:31
↑ 13↓ 160.2%
Finish· 26.22 mi
9:40/mi
4:12:22
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:34
Pace9:16 /mi
2nd Half
Distance13.11 mi
Time2:10:48
Pace9:59 /mi
📊Positive Split: 7.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:0029:499:3629:49
9:36
-
10K
6.21 mi12:16:0657:559:1928:06
9:03
-0:33
15K
9.32 mi12:44:151:26:049:1428:09
9:04
+0:01
20K
12.43 mi13:13:221:55:119:1629:07
9:22
+0:18
Half
13.11 mi13:19:452:01:349:166:23
9:21
-0:01
25K
15.53 mi13:43:042:24:539:2023:19
9:37
+0:16
30K
18.64 mi14:14:042:55:539:2631:00
9:59
+0:22
20M
20.00 mi14:27:183:09:079:2713:14
9:44
-0:15
21M
21.00 mi14:38:103:19:599:3110:52
10:52
+1:08
35K
21.75 mi14:45:493:27:389:337:39
10:14
-0:38
23M
23.00 mi14:58:323:40:219:3512:43
10:09
-0:05
24M
24.00 mi15:08:293:50:189:369:57
9:57
-0:12
40K
24.85 mi15:16:553:58:449:368:26
9:52
-0:05
25.2M
25.20 mi15:20:424:02:319:373:47
10:58
+1:06
Finish
26.22 mi15:30:334:12:229:389:51
9:40
-1:18

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

9:03 /mi

Average Pace

9:38 /mi

Slowest Pace

10:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:45

36% of race

Time at Steady Pace

2:05:36

50% of race

Time at Slower Pace

35:01

14% 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 mi11:48:0029:499:3629:49
9:36
#24542
10K
6.21 mi12:16:0657:559:1928:06
9:03
#23623
15K
9.32 mi12:44:151:26:049:1428:09
9:04
#23232
20K
12.43 mi13:13:221:55:119:1629:07
9:22
#23046
Half
13.11 mi13:19:452:01:349:166:23
9:21
#23048
25K
15.53 mi13:43:042:24:539:2023:19
9:37
#22878
30K
18.64 mi14:14:042:55:539:2631:00
9:59
#22620
20M
20.00 mi14:27:183:09:079:2713:14
9:44
#22421
21M
21.00 mi14:38:103:19:599:3110:52
10:52
#22319
35K
21.75 mi14:45:493:27:389:337:39
10:14
#22325
23M
23.00 mi14:58:323:40:219:3512:43
10:09
#22219
24M
24.00 mi15:08:293:50:189:369:57
9:57
#22172
40K
24.85 mi15:16:553:58:449:368:26
9:52
#22094
25.2M
25.20 mi15:20:424:02:319:373:47
10:58
#22059
Finish
26.22 mi15:30:334:12:229:389:51
9:40
#22036
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi24542145001450022291(Top 78%)13513(Top 84%)13513(Top 1073%)
10K6.21 mi3.10 mi23623+91914066+43414066+43422574(Top 79%)13607(Top 84%)13607(Top 1081%)
15K9.32 mi3.11 mi23232+39113914+15213914+15222291(Top 78%)13513(Top 84%)13513(Top 1073%)
20K12.43 mi3.11 mi23046+18613830+8413830+8422480(Top 79%)13568(Top 84%)13568(Top 1078%)
Half13.11 mi0.68 mi23048-213833-313833-323115(Top 81%)13834(Top 86%)13834(Top 1099%)
25K15.53 mi2.42 mi22878+17013738+9513738+9522243(Top 78%)13401(Top 83%)13401(Top 1064%)
30K18.64 mi3.11 mi22620+25813579+15913579+15921535(Top 76%)12962(Top 80%)12962(Top 1030%)
20M20.00 mi1.36 mi22421+19913477+10213477+10220067(Top 71%)12188(Top 76%)12188(Top 968%)
21M21.00 mi1.00 mi22319+10213413+6413413+6421022(Top 74%)12510(Top 78%)12510(Top 994%)
35K21.75 mi0.75 mi22325-613401+1213401+1222489(Top 79%)13148(Top 82%)13148(Top 1044%)
23M23.00 mi1.25 mi22219+10613316+8513316+8520986(Top 74%)12387(Top 77%)12387(Top 984%)
24M24.00 mi1.00 mi22172+4713274+4213274+4221210(Top 75%)12448(Top 77%)12448(Top 989%)
40K24.85 mi0.85 mi22094+7813225+4913225+4919996(Top 70%)11794(Top 73%)11794(Top 937%)
25.2M25.20 mi0.35 mi22059+3513202+2313202+2320518(Top 72%)12051(Top 75%)12051(Top 957%)
Finish26.22 mi1.02 mi22036+2313180+2213180+2221784(Top 77%)12677(Top 79%)12677(Top 1007%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

22291

Males

13513

M60-64

13513

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

22574

Males

13607

M60-64

13607

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

22291

Males

13513

M60-64

13513

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22480

Males

13568

M60-64

13568

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

23115

Males

13834

M60-64

13834

Half→25K

13.1 - 15.5 mi

Top 78%
×4story building
+66ft-88ft

Overall

22243

Males

13401

M60-64

13401

25K→30K

15.5 - 18.6 mi

Top 76%
×9story building
+181ft-148ft

Overall

21535

Males

12962

M60-64

12962

30K→20M

18.6 - 20.0 mi

Top 71%
×5story building
+64ft-50ft

Overall

20067

Males

12188

M60-64

12188

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

21022

Males

12510

M60-64

12510

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

22489

Males

13148

M60-64

13148

35K→23M

21.8 - 23.0 mi

Top 74%
×5story building
+23ft-63ft

Overall

20986

Males

12387

M60-64

12387

23M→24M

23.0 - 24.0 mi

Top 75%
×6story building
+12ft-82ft

Overall

21210

Males

12448

M60-64

12448

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

19996

Males

11794

M60-64

11794

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

20518

Males

12051

M60-64

12051

25.2M→Finish

25.2 - 26.2 mi

Top 77%
×2story building
+22ft-21ft

Overall

21784

Males

12677

M60-64

12677

Passing Analysis

Category:
Athletes Passed
2920
Passed By
414
Net Change
+2506
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24542
5K → 10K93718+919#24542#23623
10K → 15K42736+391#23623#23232
15K → 20K24660+186#23232#23046
20K → Half2628-2#23046#23048
Half → 25K21848+170#23048#22878
25K → 30K30547+258#22878#22620
30K → 20M2034+199#22620#22421
20M → 21M13129+102#22421#22319
21M → 35K3743-6#22319#22325
35K → 23M12923+106#22325#22219
23M → 24M6518+47#22219#22172
24M → 40K9214+78#22172#22094
40K → 25.2M427+35#22094#22059
25.2M → Finish6239+23#22059#22036
TOTALS2920414+2506
📊

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