Boston Marathon logo
BOSTON MARATHON 2024

Cole Kalsbeek

Bib: 3439•M

MI

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 25550
Top 47%
Gender (Male)
#0 / 14578
Division (M18-39)
#0 / 4849
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:32
Rank: #4097
Start → 5K
6:37/mi
20:32 split
10K· 6.21 mi
41:19
Rank: #4159 (-62)
5K → 10K
6:41/mi
20:47 split
15K· 9.32 mi
1:01:56
Rank: #3893 (+266)
10K → 15K
6:38/mi
20:37 split
20K· 12.43 mi
1:22:41
Rank: #3630 (+263)
15K → 20K
6:41/mi
20:45 split
Half· 13.11 mi
1:27:09
Rank: #3577 (+53)
20K → Half
6:33/mi
4:28 split
25K· 15.53 mi
1:44:29
Rank: #3838 (-261)
Half → 25K
7:09/mi
17:20 split
30K· 18.64 mi
2:20:08
Rank: #8269 (-4431)
25K → 30K
11:28/mi
35:39 split
20M
2:35:49
Rank: #9716 (-1447)
30K → 20M
11:32/mi
15:41 split
21M
2:47:04
Rank: #10335 (-619)
20M → 21M
11:15/mi
11:15 split
35K· 21.75 mi
2:55:56
Rank: #11093 (-758)
21M → 35K
11:51/mi
8:52 split
23M
3:10:15
Rank: #11936 (-843)
35K → 23M
11:26/mi
14:19 split
24M
3:20:00
Rank: #12086 (-150)
23M → 24M
9:45/mi
9:45 split
40K· 24.85 mi
3:28:32
Rank: #12215 (-129)
24M → 40K
9:59/mi
8:32 split
25.2M
3:32:08
Rank: #12218 (-3)
40K → 25.2M
10:26/mi
3:36 split
Finish· 26.22 mi
3:40:29
Rank: #12096 (+122)
25.2M → Finish
8:12/mi
8:21 split

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:09
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time2:13:20
Pace10:10 /mi
📊Positive Split: 53.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:4120:326:3720:32
6:37
-
10K
6.21 mi10:43:2841:196:3920:47
6:41
+0:04
15K
9.32 mi11:04:051:01:566:3920:37
6:38
-0:03
20K
12.43 mi11:24:501:22:416:3920:45
6:41
+0:03
Half
13.11 mi11:29:181:27:096:394:28
6:33
-0:08
25K
15.53 mi11:46:381:44:296:4417:20
7:09
+0:36
30K
18.64 mi12:22:172:20:087:3135:39
11:28
+4:19
20M
20.00 mi12:37:582:35:497:4715:41
11:32
+0:04
21M
21.00 mi12:49:132:47:047:5711:15
11:15
-0:17
35K
21.75 mi12:58:052:55:568:058:52
11:51
+0:36
23M
23.00 mi13:12:243:10:158:1614:19
11:26
-0:25
24M
24.00 mi13:22:093:20:008:209:45
9:45
-1:41
40K
24.85 mi13:30:413:28:328:238:32
9:59
+0:14
25.2M
25.20 mi13:34:173:32:088:253:36
10:26
+0:27
Finish
26.22 mi13:42:383:40:298:258:21
8:12
-2:14

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

6:33 /mi

Average Pace

8:25 /mi

Slowest Pace

11:51 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:50

51% of race

Time at Steady Pace

21:53

10% of race

Time at Slower Pace

1:25:46

39% of race

Average Pace: 8:25 /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 mi10:22:4120:326:3720:32
6:37
#4097
10K
6.21 mi10:43:2841:196:3920:47
6:41
#4159
15K
9.32 mi11:04:051:01:566:3920:37
6:38
#3893
20K
12.43 mi11:24:501:22:416:3920:45
6:41
#3630
Half
13.11 mi11:29:181:27:096:394:28
6:33
#3577
25K
15.53 mi11:46:381:44:296:4417:20
7:09
#3838
30K
18.64 mi12:22:172:20:087:3135:39
11:28
#8269
20M
20.00 mi12:37:582:35:497:4715:41
11:32
#9716
21M
21.00 mi12:49:132:47:047:5711:15
11:15
#10335
35K
21.75 mi12:58:052:55:568:058:52
11:51
#11093
23M
23.00 mi13:12:243:10:158:1614:19
11:26
#11936
24M
24.00 mi13:22:093:20:008:209:45
9:45
#12086
40K
24.85 mi13:30:413:28:328:238:32
9:59
#12215
25.2M
25.20 mi13:34:173:32:088:253:36
10:26
#12218
Finish
26.22 mi13:42:383:40:298:258:21
8:12
#12096
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4097387138713504(Top 14%)3323(Top 23%)3323(Top 69%)
10K6.21 mi3.10 mi4159-623923-523923-524261(Top 17%)3997(Top 27%)3997(Top 82%)
15K9.32 mi3.11 mi3893+2663679+2443679+2443504(Top 14%)3323(Top 23%)3323(Top 69%)
20K12.43 mi3.11 mi3630+2633444+2353444+2353099(Top 12%)2948(Top 20%)2948(Top 61%)
Half13.11 mi0.68 mi3577+533397+473397+472901(Top 11%)2771(Top 19%)2771(Top 57%)
25K15.53 mi2.42 mi3838-2613613-2163613-2165063(Top 20%)4525(Top 31%)4525(Top 93%)
30K18.64 mi3.11 mi8269-44316747-31346747-313420978(Top 82%)12311(Top 84%)12311(Top 254%)
20M20.00 mi1.36 mi9716-14477468-7217468-72120476(Top 80%)11952(Top 82%)11952(Top 246%)
21M21.00 mi1.00 mi10335-6197711-2437711-24316982(Top 66%)10096(Top 69%)10096(Top 208%)
35K21.75 mi0.75 mi11093-7588047-3368047-33621516(Top 84%)12359(Top 85%)12359(Top 255%)
23M23.00 mi1.25 mi11936-8438372-3258372-32519470(Top 76%)11296(Top 77%)11296(Top 233%)
24M24.00 mi1.00 mi12086-1508389-178389-1715425(Top 60%)9227(Top 63%)9227(Top 190%)
40K24.85 mi0.85 mi12215-1298409-208409-2014905(Top 58%)8902(Top 61%)8902(Top 184%)
25.2M25.20 mi0.35 mi12218-38387+228387+2212575(Top 49%)7652(Top 52%)7652(Top 158%)
Finish26.22 mi1.02 mi12096+1228298+898298+899731(Top 38%)6330(Top 43%)6330(Top 131%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21story building
+97ft-345ft

Overall

3504

Males

3323

M18-39

3323

5K→10K

3.1 - 6.2 mi

Top 17%
×5story building
+79ft-138ft

Overall

4261

Males

3997

M18-39

3997

10K→15K

6.2 - 9.3 mi

Top 14%
×3story building
+67ft-78ft

Overall

3504

Males

3323

M18-39

3323

15K→20K

9.3 - 12.4 mi

Top 12%
×5story building
+106ft-86ft

Overall

3099

Males

2948

M18-39

2948

20K→Half

12.4 - 13.1 mi

Top 11%
×2story building
+19ft-37ft

Overall

2901

Males

2771

M18-39

2771

Half→25K

13.1 - 15.5 mi

Top 20%
×4story building
+66ft-88ft

Overall

5063

Males

4525

M18-39

4525

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

20978

Males

12311

M18-39

12311

30K→20M

18.6 - 20.0 mi

Top 80%
×5story building
+64ft-50ft

Overall

20476

Males

11952

M18-39

11952

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

16982

Males

10096

M18-39

10096

21M→35K

21.0 - 21.8 mi

Top 84%
×7story building
+17ft-86ft

Overall

21516

Males

12359

M18-39

12359

35K→23M

21.8 - 23.0 mi

Top 76%
×5story building
+23ft-63ft

Overall

19470

Males

11296

M18-39

11296

23M→24M

23.0 - 24.0 mi

Top 60%
×6story building
+12ft-82ft

Overall

15425

Males

9227

M18-39

9227

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

14905

Males

8902

M18-39

8902

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

12575

Males

7652

M18-39

7652

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

9731

Males

6330

M18-39

6330

Passing Analysis

Category:
Athletes Passed
1215
Passed By
9212
Net Change
-7999
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4097
5K → 10K152214-62#4097#4159
10K → 15K29024+266#4159#3893
15K → 20K28421+263#3893#3630
20K → Half563+53#3630#3577
Half → 25K70331-261#3577#3838
25K → 30K54436-4431#3838#8269
30K → 20M121459-1447#8269#9716
20M → 21M18635-619#9716#10335
21M → 35K10768-758#10335#11093
35K → 23M28871-843#11093#11936
23M → 24M55205-150#11936#12086
24M → 40K51180-129#12086#12215
40K → 25.2M4346-3#12215#12218
25.2M → Finish14119+122#12218#12096
TOTALS12159212-7999
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing