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BOSTON MARATHON 2025

Daan Zwetsloot

Bib: 28774•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 29%
Gender (Male)
#0 / 16105
Top 43%
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
23:04
Rank: #11545
Start → 5K
23:04 | 7:25/mi
10K· 6.21 mi
44:58
Rank: #9765 (+1780)
5K → 10K
21:54 | 7:03/mi
15K· 9.32 mi
1:06:55
Rank: #9152 (+613)
10K → 15K
21:57 | 7:04/mi
20K· 12.43 mi
1:29:09
Rank: #8752 (+400)
15K → 20K
22:14 | 7:09/mi
Half· 13.11 mi
1:34:03
Rank: #8742 (+10)
20K → Half
4:54 | 7:11/mi
25K· 15.53 mi
1:51:57
Rank: #8730 (+12)
Half → 25K
17:54 | 7:23/mi
30K· 18.64 mi
2:16:23
Rank: #8980 (-250)
25K → 30K
24:26 | 7:52/mi
20M
2:26:49
Rank: #8873 (+107)
30K → 20M
10:26 | 7:41/mi
21M
2:34:50
Rank: #8747 (+126)
20M → 21M
8:01 | 8:01/mi
35K· 21.75 mi
2:40:25
Rank: #8706 (+41)
21M → 35K
5:35 | 7:28/mi
23M
2:50:11
Rank: #8638 (+68)
35K → 23M
9:46 | 7:48/mi
24M
2:57:50
Rank: #8605 (+33)
23M → 24M
7:39 | 7:39/mi
40K· 24.85 mi
3:04:28
Rank: #8558 (+47)
24M → 40K
6:38 | 7:45/mi
25.2M
3:07:20
Rank: #8514 (+44)
40K → 25.2M
2:52 | 8:19/mi
Finish· 26.22 mi
3:14:26
Rank: #8373 (+141)
25.2M → Finish
7:06 | 6:58/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:03
Pace7:10 /mi
2nd Half
Distance13.11 mi
Time1:40:23
Pace7:39 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:39:4423:047:2523:04
7:25
-
10K
6.21 mi12:01:3844:587:1421:54
7:03
-0:22
15K
9.32 mi12:23:351:06:557:1121:57
7:04
+0:01
20K
12.43 mi12:45:491:29:097:1022:14
7:09
+0:05
Half
13.11 mi12:50:431:34:037:104:54
7:11
+0:02
25K
15.53 mi13:08:371:51:577:1217:54
7:23
+0:12
30K
18.64 mi13:33:032:16:237:1924:26
7:52
+0:29
20M
20.00 mi13:43:292:26:497:2010:26
7:41
-0:11
21M
21.00 mi13:51:302:34:507:228:01
8:01
+0:20
35K
21.75 mi13:57:052:40:257:235:35
7:28
-0:33
23M
23.00 mi14:06:512:50:117:249:46
7:48
+0:20
24M
24.00 mi14:14:302:57:507:257:39
7:39
-0:09
40K
24.85 mi14:21:083:04:287:256:38
7:45
+0:06
25.2M
25.20 mi14:24:003:07:207:262:52
8:19
+0:34
Finish
26.22 mi14:31:063:14:267:257:06
6:58
-1:21

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

6:58 /mi

Average Pace

7:25 /mi

Slowest Pace

8:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:12:17

68% of race

Time at Steady Pace

59:17

30% of race

Time at Slower Pace

2:52

1% of race

Average Pace: 7:25 /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 mi11:39:4423:047:2523:04
7:25
#11545
10K
6.21 mi12:01:3844:587:1421:54
7:03
#9765
15K
9.32 mi12:23:351:06:557:1121:57
7:04
#9152
20K
12.43 mi12:45:491:29:097:1022:14
7:09
#8752
Half
13.11 mi12:50:431:34:037:104:54
7:11
#8742
25K
15.53 mi13:08:371:51:577:1217:54
7:23
#8730
30K
18.64 mi13:33:032:16:237:1924:26
7:52
#8980
20M
20.00 mi13:43:292:26:497:2010:26
7:41
#8873
21M
21.00 mi13:51:302:34:507:228:01
8:01
#8747
35K
21.75 mi13:57:052:40:257:235:35
7:28
#8706
23M
23.00 mi14:06:512:50:117:249:46
7:48
#8638
24M
24.00 mi14:14:302:57:507:257:39
7:39
#8605
40K
24.85 mi14:21:083:04:287:256:38
7:45
#8558
25.2M
25.20 mi14:24:003:07:207:262:52
8:19
#8514
Finish
26.22 mi14:31:063:14:267:257:06
6:58
#8373
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi11545896689668077(Top 28%)6997(Top 43%)6997(Top 124%)
10K6.21 mi3.10 mi9765+17808038+9288038+9288281(Top 29%)7154(Top 44%)7154(Top 127%)
15K9.32 mi3.11 mi9152+6137673+3657673+3658077(Top 28%)6997(Top 43%)6997(Top 124%)
20K12.43 mi3.11 mi8752+4007411+2627411+2627859(Top 28%)6782(Top 42%)6782(Top 120%)
Half13.11 mi0.68 mi8742+107399+127399+128884(Top 31%)7406(Top 46%)7406(Top 131%)
25K15.53 mi2.42 mi8730+127378+217378+218998(Top 32%)7334(Top 46%)7334(Top 130%)
30K18.64 mi3.11 mi8980-2507450-727450-7210368(Top 37%)7866(Top 49%)7866(Top 139%)
20M20.00 mi1.36 mi8873+1077367+837367+838189(Top 29%)6557(Top 41%)6557(Top 116%)
21M21.00 mi1.00 mi8747+1267258+1097258+1097429(Top 26%)5932(Top 37%)5932(Top 105%)
35K21.75 mi0.75 mi8706+417212+467212+468337(Top 29%)6501(Top 40%)6501(Top 115%)
23M23.00 mi1.25 mi8638+687130+827130+828565(Top 30%)6472(Top 40%)6472(Top 115%)
24M24.00 mi1.00 mi8605+337080+507080+508748(Top 31%)6515(Top 40%)6515(Top 115%)
40K24.85 mi0.85 mi8558+477010+707010+708454(Top 30%)6228(Top 39%)6228(Top 110%)
25.2M25.20 mi0.35 mi8514+446966+446966+447679(Top 27%)5738(Top 36%)5738(Top 102%)
Finish26.22 mi1.02 mi8373+1416856+1106856+1105521(Top 19%)4445(Top 28%)4445(Top 79%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 28%
×21stories
+97ft-345ft

Overall

8077

Males

6997

M18-39

6997

5K→10K

3.1 - 6.2 mi

Top 29%
×5stories
+79ft-138ft

Overall

8281

Males

7154

M18-39

7154

10K→15K

6.2 - 9.3 mi

Top 28%
×3stories
+67ft-78ft

Overall

8077

Males

6997

M18-39

6997

15K→20K

9.3 - 12.4 mi

Top 28%
×5stories
+106ft-86ft

Overall

7859

Males

6782

M18-39

6782

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8884

Males

7406

M18-39

7406

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

8998

Males

7334

M18-39

7334

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10368

Males

7866

M18-39

7866

30K→20M

18.6 - 20.0 mi

Top 29%
×5stories
+64ft-50ft

Overall

8189

Males

6557

M18-39

6557

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

7429

Males

5932

M18-39

5932

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8337

Males

6501

M18-39

6501

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8565

Males

6472

M18-39

6472

23M→24M

23.0 - 24.0 mi

Top 31%
×6stories
+12ft-82ft

Overall

8748

Males

6515

M18-39

6515

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

8454

Males

6228

M18-39

6228

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7679

Males

5738

M18-39

5738

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2stories
+22ft-21ft

Overall

5521

Males

4445

M18-39

4445

Passing Analysis

Category:
Athletes Passed
4103*
Passed By
931
Net Change
+3172
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11545
5K → 10K1787*7+1780#11545#9765
10K → 15K6174+613#9765#9152
15K → 20K42020+400#9152#8752
20K → Half3525+10#8752#8742
Half → 25K156144+12#8742#8730
25K → 30K143393-250#8730#8980
30K → 20M15447+107#8980#8873
20M → 21M16337+126#8873#8747
21M → 35K7433+41#8747#8706
35K → 23M14577+68#8706#8638
23M → 24M9663+33#8638#8605
24M → 40K10255+47#8605#8558
40K → 25.2M5713+44#8558#8514
25.2M → Finish15413+141#8514#8373
TOTALS4103*931+3172

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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