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BOSTON MARATHON 2025

Sjaak Kuin

Bib: 11732•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

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
8:02/mi
24:57
↑ 97↓ 3451.5%
10K· 6.21 mi
8:10/mi
50:19
↑ 79↓ 1380.4%
15K· 9.32 mi
8:11/mi
1:15:45
↑ 67↓ 78
20K· 12.43 mi
8:17/mi
1:41:30
↑ 106↓ 860.1%
Half· 13.11 mi
8:23/mi
1:47:13
↑ 19↓ 370.5%
25K· 15.53 mi
8:27/mi
2:07:42
↑ 66↓ 880.2%
30K· 18.64 mi
8:25/mi
2:33:50
↑ 181↓ 1480.2%
20M
8:27/mi
2:45:19
↑ 64↓ 500.2%
21M
8:56/mi
2:54:15
↑ 106↓ 241.6%
35K· 21.75 mi
8:21/mi
3:00:30
↑ 17↓ 861.7%
23M
8:34/mi
3:11:13
↑ 23↓ 630.6%
24M
8:18/mi
3:19:31
↓ 821.3%
40K· 24.85 mi
8:28/mi
3:26:45
↓ 200.3%
25.2M
9:02/mi
3:29:52
↑ 13↓ 160.2%
Finish· 26.22 mi
8:24/mi
3:38:26
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:13
Pace8:11 /mi
2nd Half
Distance13.11 mi
Time1:51:13
Pace8:29 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:0724:578:0224:57
8:02
-
10K
6.21 mi11:17:2950:198:0625:22
8:10
+0:08
15K
9.32 mi11:42:551:15:458:0825:26
8:11
+0:01
20K
12.43 mi12:08:401:41:308:1025:45
8:17
+0:06
Half
13.11 mi12:14:231:47:138:115:43
8:23
+0:06
25K
15.53 mi12:34:522:07:428:1320:29
8:27
+0:04
30K
18.64 mi13:01:002:33:508:1526:08
8:25
-0:02
20M
20.00 mi13:12:292:45:198:1611:29
8:27
+0:02
21M
21.00 mi13:21:252:54:158:188:56
8:56
+0:29
35K
21.75 mi13:27:403:00:308:186:15
8:21
-0:35
23M
23.00 mi13:38:233:11:138:1910:43
8:34
+0:13
24M
24.00 mi13:46:413:19:318:198:18
8:18
-0:16
40K
24.85 mi13:53:553:26:458:197:14
8:28
+0:10
25.2M
25.20 mi13:57:023:29:528:203:07
9:02
+0:34
Finish
26.22 mi14:05:363:38:268:208:34
8:24
-0:38

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

8:02 /mi

Average Pace

8:20 /mi

Slowest Pace

9:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:26:23

94% of race

Time at Steady Pace

12:03

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:20 /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 mi10:52:0724:578:0224:57
8:02
#16820
10K
6.21 mi11:17:2950:198:0625:22
8:10
#17232
15K
9.32 mi11:42:551:15:458:0825:26
8:11
#17273
20K
12.43 mi12:08:401:41:308:1025:45
8:17
#17132
Half
13.11 mi12:14:231:47:138:115:43
8:23
#17182
25K
15.53 mi12:34:522:07:428:1320:29
8:27
#17072
30K
18.64 mi13:01:002:33:508:1526:08
8:25
#16543
20M
20.00 mi13:12:292:45:198:1611:29
8:27
#16283
21M
21.00 mi13:21:252:54:158:188:56
8:56
#16066
35K
21.75 mi13:27:403:00:308:186:15
8:21
#15974
23M
23.00 mi13:38:233:11:138:1910:43
8:34
#15766
24M
24.00 mi13:46:413:19:318:198:18
8:18
#15655
40K
24.85 mi13:53:553:26:458:197:14
8:28
#15541
25.2M
25.20 mi13:57:023:29:528:203:07
9:02
#15476
Finish
26.22 mi14:05:363:38:268:208:34
8:24
#15474
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi16820111271112717292(Top 61%)11343(Top 70%)11343(Top 568%)
10K6.21 mi3.10 mi17232-41211316-18911316-18917643(Top 62%)11506(Top 71%)11506(Top 576%)
15K9.32 mi3.11 mi17273-4111344-2811344-2817292(Top 61%)11343(Top 70%)11343(Top 568%)
20K12.43 mi3.11 mi17132+14111261+8311261+8316853(Top 59%)11110(Top 69%)11110(Top 557%)
Half13.11 mi0.68 mi17182-5011279-1811279-1818411(Top 65%)11773(Top 73%)11773(Top 590%)
25K15.53 mi2.42 mi17072+11011213+6611213+6616842(Top 59%)11032(Top 69%)11032(Top 553%)
30K18.64 mi3.11 mi16543+52910943+27010943+27014203(Top 50%)9685(Top 60%)9685(Top 485%)
20M20.00 mi1.36 mi16283+26010812+13110812+13113471(Top 47%)9208(Top 57%)9208(Top 461%)
21M21.00 mi1.00 mi16066+21710687+12510687+12513119(Top 46%)8911(Top 55%)8911(Top 446%)
35K21.75 mi0.75 mi15974+9210623+6410623+6414591(Top 51%)9545(Top 59%)9545(Top 478%)
23M23.00 mi1.25 mi15766+20810489+13410489+13413659(Top 48%)9002(Top 56%)9002(Top 451%)
24M24.00 mi1.00 mi15655+11110433+5610433+5613259(Top 47%)8783(Top 55%)8783(Top 440%)
40K24.85 mi0.85 mi15541+11410347+8610347+8613173(Top 46%)8612(Top 53%)8612(Top 431%)
25.2M25.20 mi0.35 mi15476+6510309+3810309+3811996(Top 42%)8007(Top 50%)8007(Top 401%)
Finish26.22 mi1.02 mi15474+210289+2010289+2015597(Top 55%)9751(Top 61%)9751(Top 489%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

17292

Males

11343

M50-54

11343

5K→10K

3.1 - 6.2 mi

Top 62%
×5story building
+79ft-138ft

Overall

17643

Males

11506

M50-54

11506

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

17292

Males

11343

M50-54

11343

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16853

Males

11110

M50-54

11110

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

18411

Males

11773

M50-54

11773

Half→25K

13.1 - 15.5 mi

Top 59%
×4story building
+66ft-88ft

Overall

16842

Males

11032

M50-54

11032

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

14203

Males

9685

M50-54

9685

30K→20M

18.6 - 20.0 mi

Top 47%
×5story building
+64ft-50ft

Overall

13471

Males

9208

M50-54

9208

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13119

Males

8911

M50-54

8911

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

14591

Males

9545

M50-54

9545

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

13659

Males

9002

M50-54

9002

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

13259

Males

8783

M50-54

8783

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13173

Males

8612

M50-54

8612

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11996

Males

8007

M50-54

8007

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

15597

Males

9751

M50-54

9751

Passing Analysis

Category:
Athletes Passed
2604
Passed By
1258
Net Change
+1346
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16820
5K → 10K161573-412#16820#17232
10K → 15K176217-41#17232#17273
15K → 20K255114+141#17273#17132
20K → Half1767-50#17132#17182
Half → 25K210100+110#17182#17072
25K → 30K54617+529#17072#16543
30K → 20M27111+260#16543#16283
20M → 21M23720+217#16283#16066
21M → 35K11220+92#16066#15974
35K → 23M22618+208#15974#15766
23M → 24M12716+111#15766#15655
24M → 40K12915+114#15655#15541
40K → 25.2M727+65#15541#15476
25.2M → Finish6563+2#15476#15474
TOTALS26041258+1346
📊

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