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BOSTON MARATHON 2024

Sib Kalsbeek

Bib: 1881•M

AB

0:00
0:00
/ mi
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Overall
#0 / 25550
Top 11%
Gender (Male)
#0 / 14578
Top 18%
Division (M18-39)
#0 / 4849
Top 39%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:18
Rank: #3530
Start → 5K
20:18 | 6:32/mi
10K· 6.21 mi
40:39
Rank: #3400 (+130)
5K → 10K
20:21 | 6:33/mi
15K· 9.32 mi
1:00:54
Rank: #3176 (+224)
10K → 15K
20:15 | 6:31/mi
20K· 12.43 mi
1:21:37
Rank: #3075 (+101)
15K → 20K
20:43 | 6:40/mi
Half· 13.11 mi
1:26:07
Rank: #3070 (+5)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:42:34
Rank: #3016 (+54)
Half → 25K
16:27 | 6:47/mi
30K· 18.64 mi
2:04:19
Rank: #2882 (+134)
25K → 30K
21:45 | 7:00/mi
20M
2:13:45
Rank: #2757 (+125)
30K → 20M
9:26 | 6:57/mi
21M
2:21:11
Rank: #2677 (+80)
20M → 21M
7:26 | 7:26/mi
35K· 21.75 mi
2:26:20
Rank: #2642 (+35)
21M → 35K
5:09 | 6:53/mi
23M
2:35:27
Rank: #2618 (+24)
35K → 23M
9:07 | 7:17/mi
24M
2:43:08
Rank: #2738 (-120)
23M → 24M
7:41 | 7:41/mi
40K· 24.85 mi
2:49:49
Rank: #2813 (-75)
24M → 40K
6:41 | 7:49/mi
25.2M
2:52:39
Rank: #2819 (-6)
40K → 25.2M
2:50 | 8:13/mi
Finish· 26.22 mi
2:59:51
Rank: #2863 (-44)
25.2M → Finish
7:12 | 7:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:07
Pace6:34 /mi
2nd Half
Distance13.11 mi
Time1:33:44
Pace7:09 /mi
📊Positive Split: 8.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:4720:186:3220:18
6:32
-
10K
6.21 mi10:42:0840:396:3320:21
6:33
+0:01
15K
9.32 mi11:02:231:00:546:3220:15
6:31
-0:02
20K
12.43 mi11:23:061:21:376:3420:43
6:40
+0:09
Half
13.11 mi11:27:361:26:076:344:30
6:36
-0:04
25K
15.53 mi11:44:031:42:346:3616:27
6:47
+0:11
30K
18.64 mi12:05:482:04:196:4021:45
7:00
+0:13
20M
20.00 mi12:15:142:13:456:419:26
6:57
-0:03
21M
21.00 mi12:22:402:21:116:437:26
7:26
+0:29
35K
21.75 mi12:27:492:26:206:445:09
6:53
-0:33
23M
23.00 mi12:36:562:35:276:469:07
7:17
+0:24
24M
24.00 mi12:44:372:43:086:487:41
7:41
+0:24
40K
24.85 mi12:51:182:49:496:506:41
7:49
+0:08
25.2M
25.20 mi12:54:082:52:396:512:50
8:13
+0:24
Finish
26.22 mi13:01:202:59:516:527:12
7:04
-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

6:31 /mi

Average Pace

6:52 /mi

Slowest Pace

8:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:26:07

48% of race

Time at Steady Pace

59:59

33% of race

Time at Slower Pace

33:45

19% of race

Average Pace: 6:52 /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 mi10:21:4720:186:3220:18
6:32
#3530
10K
6.21 mi10:42:0840:396:3320:21
6:33
#3400
15K
9.32 mi11:02:231:00:546:3220:15
6:31
#3176
20K
12.43 mi11:23:061:21:376:3420:43
6:40
#3075
Half
13.11 mi11:27:361:26:076:344:30
6:36
#3070
25K
15.53 mi11:44:031:42:346:3616:27
6:47
#3016
30K
18.64 mi12:05:482:04:196:4021:45
7:00
#2882
20M
20.00 mi12:15:142:13:456:419:26
6:57
#2757
21M
21.00 mi12:22:402:21:116:437:26
7:26
#2677
35K
21.75 mi12:27:492:26:206:445:09
6:53
#2642
23M
23.00 mi12:36:562:35:276:469:07
7:17
#2618
24M
24.00 mi12:44:372:43:086:487:41
7:41
#2738
40K
24.85 mi12:51:182:49:496:506:41
7:49
#2813
25.2M
25.20 mi12:54:082:52:396:512:50
8:13
#2819
Finish
26.22 mi13:01:202:59:516:527:12
7:04
#2863
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3530335833582815(Top 11%)2693(Top 18%)2693(Top 56%)
10K6.21 mi3.10 mi3400+1303234+1243234+1243310(Top 13%)3145(Top 22%)3145(Top 65%)
15K9.32 mi3.11 mi3176+2243024+2103024+2102815(Top 11%)2693(Top 18%)2693(Top 56%)
20K12.43 mi3.11 mi3075+1012932+922932+923018(Top 12%)2873(Top 20%)2873(Top 59%)
Half13.11 mi0.68 mi3070+52927+52927+53136(Top 12%)2980(Top 20%)2980(Top 61%)
25K15.53 mi2.42 mi3016+542874+532874+533096(Top 12%)2911(Top 20%)2911(Top 60%)
30K18.64 mi3.11 mi2882+1342739+1352739+1352869(Top 11%)2677(Top 18%)2677(Top 55%)
20M20.00 mi1.36 mi2757+1252617+1222617+1222119(Top 8%)1991(Top 14%)1991(Top 41%)
21M21.00 mi1.00 mi2677+802539+782539+782293(Top 9%)2112(Top 14%)2112(Top 44%)
35K21.75 mi0.75 mi2642+352504+352504+352598(Top 10%)2363(Top 16%)2363(Top 49%)
23M23.00 mi1.25 mi2618+242477+272477+272835(Top 11%)2523(Top 17%)2523(Top 52%)
24M24.00 mi1.00 mi2738-1202582-1052582-1054924(Top 19%)3849(Top 26%)3849(Top 79%)
40K24.85 mi0.85 mi2813-752642-602642-604813(Top 19%)3671(Top 25%)3671(Top 76%)
25.2M25.20 mi0.35 mi2819-62639+32639+33393(Top 13%)2777(Top 19%)2777(Top 57%)
Finish26.22 mi1.02 mi2863-442672-332672-333409(Top 13%)2798(Top 19%)2798(Top 58%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 11%
×21stories
+97ft-345ft

Overall

2815

Males

2693

M18-39

2693

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3310

Males

3145

M18-39

3145

10K→15K

6.2 - 9.3 mi

Top 11%
×3stories
+67ft-78ft

Overall

2815

Males

2693

M18-39

2693

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3018

Males

2873

M18-39

2873

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3136

Males

2980

M18-39

2980

Half→25K

13.1 - 15.5 mi

Top 12%
×4stories
+66ft-88ft

Overall

3096

Males

2911

M18-39

2911

25K→30K

15.5 - 18.6 mi

Top 11%
×9stories
+181ft-148ft

Overall

2869

Males

2677

M18-39

2677

30K→20M

18.6 - 20.0 mi

Top 8%
×5stories
+64ft-50ft

Overall

2119

Males

1991

M18-39

1991

20M→21M

20.0 - 21.0 mi

Top 9%
×8stories
+106ft-24ft

Overall

2293

Males

2112

M18-39

2112

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2598

Males

2363

M18-39

2363

35K→23M

21.8 - 23.0 mi

Top 11%
×5stories
+23ft-63ft

Overall

2835

Males

2523

M18-39

2523

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

4924

Males

3849

M18-39

3849

24M→40K

24.0 - 24.9 mi

Top 19%
×1story
+6ft-20ft

Overall

4813

Males

3671

M18-39

3671

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3393

Males

2777

M18-39

2777

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3409

Males

2798

M18-39

2798

Passing Analysis

Category:
Athletes Passed
1442
Passed By
775
Net Change
+667
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3530
5K → 10K20878+130#3530#3400
10K → 15K2339+224#3400#3176
15K → 20K15554+101#3176#3075
20K → Half2217+5#3075#3070
Half → 25K12470+54#3070#3016
25K → 30K22086+134#3016#2882
30K → 20M13914+125#2882#2757
20M → 21M10323+80#2757#2677
21M → 35K5621+35#2677#2642
35K → 23M7652+24#2642#2618
23M → 24M24144-120#2618#2738
24M → 40K28103-75#2738#2813
40K → 25.2M2834-6#2813#2819
25.2M → Finish2670-44#2819#2863
TOTALS1442775+667
📊

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