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BOSTON MARATHON 2025

Thijs Kalkhoven

Bib: 28768•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
30:37
Rank: #25218
Start → 5K
30:37 | 9:51/mi
10K· 6.21 mi
1:01:04
Rank: #25033 (+185)
5K → 10K
30:27 | 9:48/mi
15K· 9.32 mi
1:32:09
Rank: #25015 (+18)
10K → 15K
31:05 | 10:00/mi
20K· 12.43 mi
2:03:16
Rank: #24805 (+210)
15K → 20K
31:07 | 10:01/mi
Half· 13.11 mi
2:09:55
Rank: #24775 (+30)
20K → Half
6:39 | 9:45/mi
25K· 15.53 mi
2:34:46
Rank: #24632 (+143)
Half → 25K
24:51 | 10:15/mi
30K· 18.64 mi
3:09:49
Rank: #24628 (+4)
25K → 30K
35:03 | 11:17/mi
20M
3:27:13
Rank: #24804 (-176)
30K → 20M
17:24 | 12:48/mi
21M
3:40:22
Rank: #24843 (-39)
20M → 21M
13:09 | 13:09/mi
35K· 21.75 mi
3:48:40
Rank: #24836 (+7)
21M → 35K
8:18 | 11:06/mi
23M
4:03:30
Rank: #24862 (-26)
35K → 23M
14:50 | 11:51/mi
24M
4:14:55
Rank: #24865 (-3)
23M → 24M
11:25 | 11:25/mi
40K· 24.85 mi
4:25:35
Rank: #24907 (-42)
24M → 40K
10:40 | 12:29/mi
25.2M
4:31:04
Rank: #24988 (-81)
40K → 25.2M
5:29 | 15:54/mi
Finish· 26.22 mi
4:43:36
Rank: #25089 (-101)
25.2M → Finish
12:32 | 12:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:09:55
Pace9:55 /mi
2nd Half
Distance13.11 mi
Time2:33:41
Pace11:43 /mi
📊Positive Split: 18.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:3430:379:5130:37
9:51
-
10K
6.21 mi12:19:011:01:049:5030:27
9:48
-0:03
15K
9.32 mi12:50:061:32:099:5331:05
10:00
+0:12
20K
12.43 mi13:21:132:03:169:5531:07
10:01
+0:01
Half
13.11 mi13:27:522:09:559:556:39
9:45
-0:16
25K
15.53 mi13:52:432:34:469:5824:51
10:15
+0:30
30K
18.64 mi14:27:463:09:4910:1135:03
11:17
+1:02
20M
20.00 mi14:45:103:27:1310:2217:24
12:48
+1:31
21M
21.00 mi14:58:193:40:2210:3013:09
13:09
+0:21
35K
21.75 mi15:06:373:48:4010:318:18
11:06
-2:03
23M
23.00 mi15:21:274:03:3010:3514:50
11:51
+0:45
24M
24.00 mi15:32:524:14:5510:3711:25
11:25
-0:26
40K
24.85 mi15:43:324:25:3510:4110:40
12:29
+1:04
25.2M
25.20 mi15:49:014:31:0410:455:29
15:54
+3:25
Finish
26.22 mi16:01:334:43:3610:4912:32
12:18
-3:36

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

9:45 /mi

Average Pace

10:49 /mi

Slowest Pace

15:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:46

55% of race

Time at Steady Pace

1:09:36

25% of race

Time at Slower Pace

59:14

21% of race

Average Pace: 10:49 /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 mi11:48:3430:379:5130:37
9:51
#25218
10K
6.21 mi12:19:011:01:049:5030:27
9:48
#25033
15K
9.32 mi12:50:061:32:099:5331:05
10:00
#25015
20K
12.43 mi13:21:132:03:169:5531:07
10:01
#24805
Half
13.11 mi13:27:522:09:559:556:39
9:45
#24775
25K
15.53 mi13:52:432:34:469:5824:51
10:15
#24632
30K
18.64 mi14:27:463:09:4910:1135:03
11:17
#24628
20M
20.00 mi14:45:103:27:1310:2217:24
12:48
#24804
21M
21.00 mi14:58:193:40:2210:3013:09
13:09
#24843
35K
21.75 mi15:06:373:48:4010:318:18
11:06
#24836
23M
23.00 mi15:21:274:03:3010:3514:50
11:51
#24862
24M
24.00 mi15:32:524:14:5510:3711:25
11:25
#24865
40K
24.85 mi15:43:324:25:3510:4110:40
12:29
#24907
25.2M
25.20 mi15:49:014:31:0410:455:29
15:54
#24988
Finish
26.22 mi16:01:334:43:3610:4912:32
12:18
#25089
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25218148291482924994(Top 88%)14721(Top 91%)14721(Top 261%)
10K6.21 mi3.10 mi25033+18514720+10914720+10924849(Top 87%)14634(Top 91%)14634(Top 259%)
15K9.32 mi3.11 mi25015+18147201472024994(Top 88%)14721(Top 91%)14721(Top 261%)
20K12.43 mi3.11 mi24805+21014616+10414616+10424253(Top 85%)14339(Top 89%)14339(Top 254%)
Half13.11 mi0.68 mi24775+3014603+1314603+1324241(Top 85%)14343(Top 89%)14343(Top 254%)
25K15.53 mi2.42 mi24632+14314520+8314520+8323829(Top 84%)14120(Top 88%)14120(Top 250%)
30K18.64 mi3.11 mi24628+414491+2914491+2924514(Top 86%)14314(Top 89%)14314(Top 254%)
20M20.00 mi1.36 mi24804-17614554-6314554-6326252(Top 92%)15046(Top 93%)15046(Top 267%)
21M21.00 mi1.00 mi24843-3914559-514559-525246(Top 89%)14489(Top 90%)14489(Top 257%)
35K21.75 mi0.75 mi24836+714551+814551+824419(Top 86%)14071(Top 87%)14071(Top 249%)
23M23.00 mi1.25 mi24862-2614547+414547+424857(Top 88%)14271(Top 89%)14271(Top 253%)
24M24.00 mi1.00 mi24865-314533+1414533+1424751(Top 87%)14171(Top 88%)14171(Top 251%)
40K24.85 mi0.85 mi24907-4214538-514538-525629(Top 90%)14603(Top 91%)14603(Top 259%)
25.2M25.20 mi0.35 mi24988-8114578-4014578-4027660(Top 97%)15626(Top 97%)15626(Top 277%)
Finish26.22 mi1.02 mi25089-10114619-4114619-4127114(Top 95%)15368(Top 95%)15368(Top 272%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21stories
+97ft-345ft

Overall

24994

Males

14721

M18-39

14721

5K→10K

3.1 - 6.2 mi

Top 87%
×5stories
+79ft-138ft

Overall

24849

Males

14634

M18-39

14634

10K→15K

6.2 - 9.3 mi

Top 88%
×3stories
+67ft-78ft

Overall

24994

Males

14721

M18-39

14721

15K→20K

9.3 - 12.4 mi

Top 85%
×5stories
+106ft-86ft

Overall

24253

Males

14339

M18-39

14339

20K→Half

12.4 - 13.1 mi

Top 85%
×2stories
+19ft-37ft

Overall

24241

Males

14343

M18-39

14343

Half→25K

13.1 - 15.5 mi

Top 84%
×4stories
+66ft-88ft

Overall

23829

Males

14120

M18-39

14120

25K→30K

15.5 - 18.6 mi

Top 86%
×9stories
+181ft-148ft

Overall

24514

Males

14314

M18-39

14314

30K→20M

18.6 - 20.0 mi

Top 92%
×5stories
+64ft-50ft

Overall

26252

Males

15046

M18-39

15046

20M→21M

20.0 - 21.0 mi

Top 89%
×8stories
+106ft-24ft

Overall

25246

Males

14489

M18-39

14489

21M→35K

21.0 - 21.8 mi

Top 86%
×7stories
+17ft-86ft

Overall

24419

Males

14071

M18-39

14071

35K→23M

21.8 - 23.0 mi

Top 88%
×5stories
+23ft-63ft

Overall

24857

Males

14271

M18-39

14271

23M→24M

23.0 - 24.0 mi

Top 87%
×6stories
+12ft-82ft

Overall

24751

Males

14171

M18-39

14171

24M→40K

24.0 - 24.9 mi

Top 90%
×1story
+6ft-20ft

Overall

25629

Males

14603

M18-39

14603

40K→25.2M

24.9 - 25.2 mi

Top 97%
×1story
+13ft-16ft

Overall

27660

Males

15626

M18-39

15626

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2stories
+22ft-21ft

Overall

27114

Males

15368

M18-39

15368

Passing Analysis

Category:
Athletes Passed
1228
Passed By
1099
Net Change
+129
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25218
5K → 10K27792+185#25218#25033
10K → 15K133115+18#25033#25015
15K → 20K26353+210#25015#24805
20K → Half388+30#24805#24775
Half → 25K17431+143#24775#24632
25K → 30K142138+4#24632#24628
30K → 20M21197-176#24628#24804
20M → 21M3776-39#24804#24843
21M → 35K3730+7#24843#24836
35K → 23M3662-26#24836#24862
23M → 24M3639-3#24862#24865
24M → 40K2870-42#24865#24907
40K → 25.2M182-81#24907#24988
25.2M → Finish5106-101#24988#25089
TOTALS12281099+129
📊

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