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BOSTON MARATHON 2025

Steven Chiu

Bib: 13366•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 35%
Gender (Male)
#0 / 16105
Top 48%
Masters (Masters Men)
#0 / 10463
Top 36%
Division (M50-54)
#0 / 1996
Top 37%
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
7:14/mi
22:28
↑ 97↓ 3451.5%
10K· 6.21 mi
7:10/mi
44:44
↑ 79↓ 1380.4%
15K· 9.32 mi
7:12/mi
1:07:05
↑ 67↓ 78
20K· 12.43 mi
7:19/mi
1:29:49
↑ 106↓ 860.1%
Half· 13.11 mi
7:17/mi
1:34:47
↑ 19↓ 370.5%
25K· 15.53 mi
7:26/mi
1:52:49
↑ 66↓ 880.2%
30K· 18.64 mi
7:53/mi
2:17:19
↑ 181↓ 1480.2%
20M
7:58/mi
2:28:09
↑ 64↓ 500.2%
21M
8:23/mi
2:36:32
↑ 106↓ 241.6%
35K· 21.75 mi
7:36/mi
2:42:13
↑ 17↓ 861.7%
23M
8:04/mi
2:52:19
↑ 23↓ 630.6%
24M
8:02/mi
3:00:21
↓ 821.3%
40K· 24.85 mi
8:10/mi
3:07:20
↓ 200.3%
25.2M
9:25/mi
3:10:35
↑ 13↓ 160.2%
Finish· 26.22 mi
8:16/mi
3:19:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:47
Pace7:14 /mi
2nd Half
Distance13.11 mi
Time1:44:13
Pace7:57 /mi
📊Positive Split: 10.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:4822:287:1422:28
7:14
-
10K
6.21 mi11:15:0444:447:1222:16
7:10
-0:04
15K
9.32 mi11:37:251:07:057:1222:21
7:12
+0:02
20K
12.43 mi12:00:091:29:497:1422:44
7:19
+0:07
Half
13.11 mi12:05:071:34:477:144:58
7:17
-0:02
25K
15.53 mi12:23:091:52:497:1618:02
7:26
+0:09
30K
18.64 mi12:47:392:17:197:2224:30
7:53
+0:27
20M
20.00 mi12:58:292:28:097:2410:50
7:58
+0:05
21M
21.00 mi13:06:522:36:327:278:23
8:23
+0:25
35K
21.75 mi13:12:332:42:137:285:41
7:36
-0:47
23M
23.00 mi13:22:392:52:197:3010:06
8:04
+0:28
24M
24.00 mi13:30:413:00:217:318:02
8:02
-0:02
40K
24.85 mi13:37:403:07:207:326:59
8:10
+0:08
25.2M
25.20 mi13:40:553:10:357:343:15
9:25
+1:15
Finish
26.22 mi13:49:203:19:007:368:25
8:16
-1:09

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

7:10 /mi

Average Pace

7:36 /mi

Slowest Pace

9:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:49

57% of race

Time at Steady Pace

1:06:08

33% of race

Time at Slower Pace

20:03

10% of race

Average Pace: 7:35 /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 mi10:52:4822:287:1422:28
7:14
#9734
10K
6.21 mi11:15:0444:447:1222:16
7:10
#9447
15K
9.32 mi11:37:251:07:057:1222:21
7:12
#9314
20K
12.43 mi12:00:091:29:497:1422:44
7:19
#9227
Half
13.11 mi12:05:071:34:477:144:58
7:17
#9253
25K
15.53 mi12:23:091:52:497:1618:02
7:26
#9240
30K
18.64 mi12:47:392:17:197:2224:30
7:53
#9412
20M
20.00 mi12:58:292:28:097:2410:50
7:58
#9446
21M
21.00 mi13:06:522:36:327:278:23
8:23
#9439
35K
21.75 mi13:12:332:42:137:285:41
7:36
#9395
23M
23.00 mi13:22:392:52:197:3010:06
8:04
#9430
24M
24.00 mi13:30:413:00:217:318:02
8:02
#9495
40K
24.85 mi13:37:403:07:207:326:59
8:10
#9549
25.2M
25.20 mi13:40:553:10:357:343:15
9:25
#9627
Finish
26.22 mi13:49:203:19:007:368:25
8:16
#9824
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi9734802380239053(Top 32%)7581(Top 47%)7581(Top 380%)
10K6.21 mi3.10 mi9447+2877873+1507873+1509206(Top 32%)7722(Top 48%)7722(Top 387%)
15K9.32 mi3.11 mi9314+1337764+1097764+1099053(Top 32%)7581(Top 47%)7581(Top 380%)
20K12.43 mi3.11 mi9227+877687+777687+779181(Top 32%)7553(Top 47%)7553(Top 378%)
Half13.11 mi0.68 mi9253-267697-107697-109781(Top 34%)7909(Top 49%)7909(Top 396%)
25K15.53 mi2.42 mi9240+137656+417656+419435(Top 33%)7570(Top 47%)7570(Top 379%)
30K18.64 mi3.11 mi9412-1727698-427698-4210516(Top 37%)7941(Top 49%)7941(Top 398%)
20M20.00 mi1.36 mi9446-347673+257673+2510231(Top 36%)7649(Top 47%)7649(Top 383%)
21M21.00 mi1.00 mi9439+77642+317642+319732(Top 34%)7224(Top 45%)7224(Top 362%)
35K21.75 mi0.75 mi9395+447597+457597+459299(Top 33%)7005(Top 43%)7005(Top 351%)
23M23.00 mi1.25 mi9430-357581+167581+1610493(Top 37%)7473(Top 46%)7473(Top 374%)
24M24.00 mi1.00 mi9495-657576+57576+511455(Top 40%)7876(Top 49%)7876(Top 395%)
40K24.85 mi0.85 mi9549-547571+57571+511330(Top 40%)7721(Top 48%)7721(Top 387%)
25.2M25.20 mi0.35 mi9627-787587-167587-1614054(Top 49%)8939(Top 56%)8939(Top 448%)
Finish26.22 mi1.02 mi9824-1977658-717658-7114632(Top 52%)9304(Top 58%)9304(Top 466%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

9053

Males

7581

M50-54

7581

5K→10K

3.1 - 6.2 mi

Top 32%
×5story building
+79ft-138ft

Overall

9206

Males

7722

M50-54

7722

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

9053

Males

7581

M50-54

7581

15K→20K

9.3 - 12.4 mi

Top 32%
×5story building
+106ft-86ft

Overall

9181

Males

7553

M50-54

7553

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9781

Males

7909

M50-54

7909

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

9435

Males

7570

M50-54

7570

25K→30K

15.5 - 18.6 mi

Top 37%
×9story building
+181ft-148ft

Overall

10516

Males

7941

M50-54

7941

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

10231

Males

7649

M50-54

7649

20M→21M

20.0 - 21.0 mi

Top 34%
×8story building
+106ft-24ft

Overall

9732

Males

7224

M50-54

7224

21M→35K

21.0 - 21.8 mi

Top 33%
×7story building
+17ft-86ft

Overall

9299

Males

7005

M50-54

7005

35K→23M

21.8 - 23.0 mi

Top 37%
×5story building
+23ft-63ft

Overall

10493

Males

7473

M50-54

7473

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11455

Males

7876

M50-54

7876

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11330

Males

7721

M50-54

7721

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

14054

Males

8939

M50-54

8939

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

14632

Males

9304

M50-54

9304

Passing Analysis

Category:
Athletes Passed
1719
Passed By
1809
Net Change
-90
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9734
5K → 10K396109+287#9734#9447
10K → 15K22996+133#9447#9314
15K → 20K209122+87#9314#9227
20K → Half2551-26#9227#9253
Half → 25K158145+13#9253#9240
25K → 30K175347-172#9240#9412
30K → 20M95129-34#9412#9446
20M → 21M9386+7#9446#9439
21M → 35K7834+44#9439#9395
35K → 23M97132-35#9395#9430
23M → 24M66131-65#9430#9495
24M → 40K54108-54#9495#9549
40K → 25.2M1593-78#9549#9627
25.2M → Finish29226-197#9627#9824
TOTALS17191809-90
📊

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