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BOSTON MARATHON 2025

Tobias Van Der Sar

Bib: 28527•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
25:52
Rank: #18852
Start → 5K
25:52 | 8:20/mi
10K· 6.21 mi
50:42
Rank: #17680 (+1172)
5K → 10K
24:50 | 8:00/mi
15K· 9.32 mi
1:15:40
Rank: #17211 (+469)
10K → 15K
24:58 | 8:02/mi
20K· 12.43 mi
1:41:08
Rank: #16953 (+258)
15K → 20K
25:28 | 8:12/mi
Half· 13.11 mi
1:46:36
Rank: #16898 (+55)
20K → Half
5:28 | 8:01/mi
25K· 15.53 mi
2:06:55
Rank: #16772 (+126)
Half → 25K
20:19 | 8:23/mi
30K· 18.64 mi
2:34:30
Rank: #16756 (+16)
25K → 30K
27:35 | 8:53/mi
20M
2:46:39
Rank: #16719 (+37)
30K → 20M
12:09 | 8:56/mi
21M
2:56:15
Rank: #16655 (+64)
20M → 21M
9:36 | 9:36/mi
35K· 21.75 mi
3:02:56
Rank: #16697 (-42)
21M → 35K
6:41 | 8:56/mi
23M
3:14:13
Rank: #16636 (+61)
35K → 23M
11:17 | 9:01/mi
24M
3:22:51
Rank: #16569 (+67)
23M → 24M
8:38 | 8:38/mi
40K· 24.85 mi
3:30:44
Rank: #16598 (-29)
24M → 40K
7:53 | 9:13/mi
25.2M
3:34:09
Rank: #16601 (-3)
40K → 25.2M
3:25 | 9:54/mi
Finish· 26.22 mi
3:43:09
Rank: #16662 (-61)
25.2M → Finish
9:00 | 8:50/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:36
Pace8:08 /mi
2nd Half
Distance13.11 mi
Time1:56:33
Pace8:53 /mi
📊Positive Split: 9.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:5425:528:2025:52
8:20
-
10K
6.21 mi12:07:4450:428:1024:50
8:00
-0:20
15K
9.32 mi12:32:421:15:408:0724:58
8:02
+0:02
20K
12.43 mi12:58:101:41:088:0825:28
8:12
+0:10
Half
13.11 mi13:03:381:46:368:085:28
8:01
-0:11
25K
15.53 mi13:23:572:06:558:1020:19
8:23
+0:22
30K
18.64 mi13:51:322:34:308:1727:35
8:53
+0:30
20M
20.00 mi14:03:412:46:398:2012:09
8:56
+0:03
21M
21.00 mi14:13:172:56:158:249:36
9:36
+0:40
35K
21.75 mi14:19:583:02:568:256:41
8:56
-0:40
23M
23.00 mi14:31:153:14:138:2711:17
9:01
+0:05
24M
24.00 mi14:39:533:22:518:278:38
8:38
-0:23
40K
24.85 mi14:47:463:30:448:297:53
9:13
+0:35
25.2M
25.20 mi14:51:113:34:098:303:25
9:54
+0:41
Finish
26.22 mi15:00:113:43:098:319:00
8:50
-1:04

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

8:00 /mi

Average Pace

8:31 /mi

Slowest Pace

9:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:06:55

57% of race

Time at Steady Pace

1:15:20

34% of race

Time at Slower Pace

20:54

9% of race

Average Pace: 8:31 /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 mi11:42:5425:528:2025:52
8:20
#18852
10K
6.21 mi12:07:4450:428:1024:50
8:00
#17680
15K
9.32 mi12:32:421:15:408:0724:58
8:02
#17211
20K
12.43 mi12:58:101:41:088:0825:28
8:12
#16953
Half
13.11 mi13:03:381:46:368:085:28
8:01
#16898
25K
15.53 mi13:23:572:06:558:1020:19
8:23
#16772
30K
18.64 mi13:51:322:34:308:1727:35
8:53
#16756
20M
20.00 mi14:03:412:46:398:2012:09
8:56
#16719
21M
21.00 mi14:13:172:56:158:249:36
9:36
#16655
35K
21.75 mi14:19:583:02:568:256:41
8:56
#16697
23M
23.00 mi14:31:153:14:138:2711:17
9:01
#16636
24M
24.00 mi14:39:533:22:518:278:38
8:38
#16569
40K
24.85 mi14:47:463:30:448:297:53
9:13
#16598
25.2M
25.20 mi14:51:113:34:098:303:25
9:54
#16601
Finish
26.22 mi15:00:113:43:098:319:00
8:50
#16662
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi18852119701197016311(Top 57%)10941(Top 68%)10941(Top 194%)
10K6.21 mi3.10 mi17680+117211488+48211488+48216419(Top 58%)10995(Top 68%)10995(Top 195%)
15K9.32 mi3.11 mi17211+46911324+16411324+16416311(Top 57%)10941(Top 68%)10941(Top 194%)
20K12.43 mi3.11 mi16953+25811190+13411190+13416280(Top 57%)10862(Top 67%)10862(Top 193%)
Half13.11 mi0.68 mi16898+5511170+2011170+2015959(Top 56%)10762(Top 67%)10762(Top 191%)
25K15.53 mi2.42 mi16772+12611092+7811092+7816422(Top 58%)10834(Top 67%)10834(Top 192%)
30K18.64 mi3.11 mi16756+1611035+5711035+5717024(Top 60%)10934(Top 68%)10934(Top 194%)
20M20.00 mi1.36 mi16719+3711001+3411001+3416463(Top 58%)10565(Top 66%)10565(Top 187%)
21M21.00 mi1.00 mi16655+6410934+6710934+6716526(Top 58%)10485(Top 65%)10485(Top 186%)
35K21.75 mi0.75 mi16697-4210931+310931+317894(Top 63%)10997(Top 68%)10997(Top 195%)
23M23.00 mi1.25 mi16636+6110874+5710874+5716317(Top 57%)10205(Top 63%)10205(Top 181%)
24M24.00 mi1.00 mi16569+6710827+4710827+4715343(Top 54%)9738(Top 60%)9738(Top 173%)
40K24.85 mi0.85 mi16598-2910807+2010807+2017425(Top 61%)10563(Top 66%)10563(Top 187%)
25.2M25.20 mi0.35 mi16601-310798+910798+916561(Top 58%)10154(Top 63%)10154(Top 180%)
Finish26.22 mi1.02 mi16662-6110792+610792+618188(Top 64%)10961(Top 68%)10961(Top 194%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21stories
+97ft-345ft

Overall

16311

Males

10941

M18-39

10941

5K→10K

3.1 - 6.2 mi

Top 58%
×5stories
+79ft-138ft

Overall

16419

Males

10995

M18-39

10995

10K→15K

6.2 - 9.3 mi

Top 57%
×3stories
+67ft-78ft

Overall

16311

Males

10941

M18-39

10941

15K→20K

9.3 - 12.4 mi

Top 57%
×5stories
+106ft-86ft

Overall

16280

Males

10862

M18-39

10862

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

15959

Males

10762

M18-39

10762

Half→25K

13.1 - 15.5 mi

Top 58%
×4stories
+66ft-88ft

Overall

16422

Males

10834

M18-39

10834

25K→30K

15.5 - 18.6 mi

Top 60%
×9stories
+181ft-148ft

Overall

17024

Males

10934

M18-39

10934

30K→20M

18.6 - 20.0 mi

Top 58%
×5stories
+64ft-50ft

Overall

16463

Males

10565

M18-39

10565

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

16526

Males

10485

M18-39

10485

21M→35K

21.0 - 21.8 mi

Top 63%
×7stories
+17ft-86ft

Overall

17894

Males

10997

M18-39

10997

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

16317

Males

10205

M18-39

10205

23M→24M

23.0 - 24.0 mi

Top 54%
×6stories
+12ft-82ft

Overall

15343

Males

9738

M18-39

9738

24M→40K

24.0 - 24.9 mi

Top 61%
×1story
+6ft-20ft

Overall

17425

Males

10563

M18-39

10563

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

16561

Males

10154

M18-39

10154

25.2M→Finish

25.2 - 26.2 mi

Top 64%
×2stories
+22ft-21ft

Overall

18188

Males

10961

M18-39

10961

Passing Analysis

Category:
Athletes Passed
3249
Passed By
1059
Net Change
+2190
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18852
5K → 10K120028+1172#18852#17680
10K → 15K51041+469#17680#17211
15K → 20K32668+258#17211#16953
20K → Half6712+55#16953#16898
Half → 25K21892+126#16898#16772
25K → 30K227211+16#16772#16756
30K → 20M12184+37#16756#16719
20M → 21M13167+64#16719#16655
21M → 35K5395-42#16655#16697
35K → 23M13877+61#16697#16636
23M → 24M10538+67#16636#16569
24M → 40K6796-29#16569#16598
40K → 25.2M3336-3#16598#16601
25.2M → Finish53114-61#16601#16662
TOTALS32491059+2190
📊

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