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BOSTON MARATHON 2025

Chris Dekoning

Bib: 9141•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 14%
Gender (Male)
#0 / 16105
Top 23%
Masters (Masters Men)
#0 / 10463
Top 10%
Division (M40-44)
#0 / 2247
Top 27%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:42
Rank: #5109
Start → 5K
20:42 | 6:40/mi
10K· 6.21 mi
41:19
Rank: #4913 (+196)
5K → 10K
20:37 | 6:38/mi
15K· 9.32 mi
1:02:12
Rank: #4980 (-67)
10K → 15K
20:53 | 6:43/mi
20K· 12.43 mi
1:23:14
Rank: #4967 (+13)
15K → 20K
21:02 | 6:46/mi
Half· 13.11 mi
1:27:50
Rank: #4994 (-27)
20K → Half
4:36 | 6:45/mi
25K· 15.53 mi
1:44:12
Rank: #4864 (+130)
Half → 25K
16:22 | 6:45/mi
30K· 18.64 mi
2:05:43
Rank: #4686 (+178)
25K → 30K
21:31 | 6:56/mi
20M
2:15:15
Rank: #4620 (+66)
30K → 20M
9:32 | 7:01/mi
21M
2:22:42
Rank: #4572 (+48)
20M → 21M
7:27 | 7:27/mi
35K· 21.75 mi
2:27:39
Rank: #4472 (+100)
21M → 35K
4:57 | 6:37/mi
23M
2:36:09
Rank: #4295 (+177)
35K → 23M
8:30 | 6:47/mi
24M
2:42:52
Rank: #4200 (+95)
23M → 24M
6:43 | 6:43/mi
40K· 24.85 mi
2:48:41
Rank: #4117 (+83)
24M → 40K
5:49 | 6:48/mi
25.2M
2:51:18
Rank: #4104 (+13)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
2:58:11
Rank: #4083 (+21)
25.2M → Finish
6:53 | 6:45/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:50
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:30:21
Pace6:54 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:0720:426:4020:42
6:40
-
10K
6.21 mi11:06:4441:196:3920:37
6:38
-0:02
15K
9.32 mi11:27:371:02:126:4020:53
6:43
+0:05
20K
12.43 mi11:48:391:23:146:4221:02
6:46
+0:03
Half
13.11 mi11:53:151:27:506:424:36
6:45
-0:01
25K
15.53 mi12:09:371:44:126:4216:22
6:45
0:00
30K
18.64 mi12:31:082:05:436:4521:31
6:56
+0:11
20M
20.00 mi12:40:402:15:156:469:32
7:01
+0:05
21M
21.00 mi12:48:072:22:426:487:27
7:27
+0:26
35K
21.75 mi12:53:042:27:396:474:57
6:37
-0:50
23M
23.00 mi13:01:342:36:096:478:30
6:47
+0:10
24M
24.00 mi13:08:172:42:526:476:43
6:43
-0:04
40K
24.85 mi13:14:062:48:416:475:49
6:48
+0:05
25.2M
25.20 mi13:16:432:51:186:482:37
7:35
+0:47
Finish
26.22 mi13:23:362:58:116:486:53
6:45
-0:50

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

6:37 /mi

Average Pace

6:48 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:07

94% of race

Time at Steady Pace

10:04

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:48 /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 mi10:46:0720:426:4020:42
6:40
#5109
10K
6.21 mi11:06:4441:196:3920:37
6:38
#4913
15K
9.32 mi11:27:371:02:126:4020:53
6:43
#4980
20K
12.43 mi11:48:391:23:146:4221:02
6:46
#4967
Half
13.11 mi11:53:151:27:506:424:36
6:45
#4994
25K
15.53 mi12:09:371:44:126:4216:22
6:45
#4864
30K
18.64 mi12:31:082:05:436:4521:31
6:56
#4686
20M
20.00 mi12:40:402:15:156:469:32
7:01
#4620
21M
21.00 mi12:48:072:22:426:487:27
7:27
#4572
35K
21.75 mi12:53:042:27:396:474:57
6:37
#4472
23M
23.00 mi13:01:342:36:096:478:30
6:47
#4295
24M
24.00 mi13:08:172:42:526:476:43
6:43
#4200
40K
24.85 mi13:14:062:48:416:475:49
6:48
#4117
25.2M
25.20 mi13:16:432:51:186:482:37
7:35
#4104
Finish
26.22 mi13:23:362:58:116:486:53
6:45
#4083
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5109476547655265(Top 19%)4864(Top 30%)4864(Top 216%)
10K6.21 mi3.10 mi4913+1964584+1814584+1814737(Top 17%)4434(Top 28%)4434(Top 197%)
15K9.32 mi3.11 mi4980-674644-604644-605265(Top 19%)4864(Top 30%)4864(Top 216%)
20K12.43 mi3.11 mi4967+134623+214623+214984(Top 18%)4600(Top 29%)4600(Top 205%)
Half13.11 mi0.68 mi4994-274644-214644-215548(Top 20%)5068(Top 31%)5068(Top 226%)
25K15.53 mi2.42 mi4864+1304521+1234521+1234474(Top 16%)4134(Top 26%)4134(Top 184%)
30K18.64 mi3.11 mi4686+1784351+1704351+1704241(Top 15%)3894(Top 24%)3894(Top 173%)
20M20.00 mi1.36 mi4620+664284+674284+674175(Top 15%)3814(Top 24%)3814(Top 170%)
21M21.00 mi1.00 mi4572+484242+424242+424328(Top 15%)3872(Top 24%)3872(Top 172%)
35K21.75 mi0.75 mi4472+1004145+974145+973051(Top 11%)2806(Top 17%)2806(Top 125%)
23M23.00 mi1.25 mi4295+1773985+1603985+1602642(Top 9%)2434(Top 15%)2434(Top 108%)
24M24.00 mi1.00 mi4200+953888+973888+973054(Top 11%)2767(Top 17%)2767(Top 123%)
40K24.85 mi0.85 mi4117+833807+813807+812848(Top 10%)2574(Top 16%)2574(Top 115%)
25.2M25.20 mi0.35 mi4104+133793+143793+143769(Top 13%)3251(Top 20%)3251(Top 145%)
Finish26.22 mi1.02 mi4083+213770+233770+234200(Top 15%)3577(Top 22%)3577(Top 159%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

5265

Males

4864

M40-44

4864

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4737

Males

4434

M40-44

4434

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

5265

Males

4864

M40-44

4864

15K→20K

9.3 - 12.4 mi

Top 18%
×5stories
+106ft-86ft

Overall

4984

Males

4600

M40-44

4600

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5548

Males

5068

M40-44

5068

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4474

Males

4134

M40-44

4134

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4241

Males

3894

M40-44

3894

30K→20M

18.6 - 20.0 mi

Top 15%
×5stories
+64ft-50ft

Overall

4175

Males

3814

M40-44

3814

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

4328

Males

3872

M40-44

3872

21M→35K

21.0 - 21.8 mi

Top 11%
×7stories
+17ft-86ft

Overall

3051

Males

2806

M40-44

2806

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2642

Males

2434

M40-44

2434

23M→24M

23.0 - 24.0 mi

Top 11%
×6stories
+12ft-82ft

Overall

3054

Males

2767

M40-44

2767

24M→40K

24.0 - 24.9 mi

Top 10%
×1story
+6ft-20ft

Overall

2848

Males

2574

M40-44

2574

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3769

Males

3251

M40-44

3251

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4200

Males

3577

M40-44

3577

Passing Analysis

Category:
Athletes Passed
1721
Passed By
695
Net Change
+1026
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5109
5K → 10K28791+196#5109#4913
10K → 15K98165-67#4913#4980
15K → 20K138125+13#4980#4967
20K → Half1239-27#4967#4994
Half → 25K16333+130#4994#4864
25K → 30K24971+178#4864#4686
30K → 20M10640+66#4686#4620
20M → 21M9951+48#4620#4572
21M → 35K1055+100#4572#4472
35K → 23M1847+177#4472#4295
23M → 24M10611+95#4295#4200
24M → 40K907+83#4200#4117
40K → 25.2M2714+13#4117#4104
25.2M → Finish5736+21#4104#4083
TOTALS1721695+1026
📊

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