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BOSTON MARATHON 2025

Lars Nijboer

Bib: 1977•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 11%
Gender (Male)
#0 / 16105
Top 18%
Division (M18-39)
#0 / 5642
Top 39%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:02
Rank: #3445
Start → 5K
6:27/mi
20:02 split
10K· 6.21 mi
40:18
Rank: #3668 (-223)
5K → 10K
6:31/mi
20:16 split
15K· 9.32 mi
1:00:34
Rank: #3679 (-11)
10K → 15K
6:31/mi
20:16 split
20K· 12.43 mi
1:21:01
Rank: #3647 (+32)
15K → 20K
6:35/mi
20:27 split
Half· 13.11 mi
1:25:26
Rank: #3639 (+8)
20K → Half
6:28/mi
4:25 split
25K· 15.53 mi
1:41:23
Rank: #3557 (+82)
Half → 25K
6:35/mi
15:57 split
30K· 18.64 mi
2:02:16
Rank: #3380 (+177)
25K → 30K
6:43/mi
20:53 split
20M
2:11:33
Rank: #3318 (+62)
30K → 20M
6:50/mi
9:17 split
21M
2:18:48
Rank: #3286 (+32)
20M → 21M
7:15/mi
7:15 split
35K· 21.75 mi
2:23:48
Rank: #3273 (+13)
21M → 35K
6:41/mi
5:00 split
23M
2:32:27
Rank: #3213 (+60)
35K → 23M
6:55/mi
8:39 split
24M
2:39:08
Rank: #3165 (+48)
23M → 24M
6:41/mi
6:41 split
40K· 24.85 mi
2:44:49
Rank: #3073 (+92)
24M → 40K
6:39/mi
5:41 split
25.2M
2:47:19
Rank: #3037 (+36)
40K → 25.2M
7:15/mi
2:30 split
Finish· 26.22 mi
2:53:58
Rank: #2996 (+41)
25.2M → Finish
6:32/mi
6:39 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:26
Pace6:31 /mi
2nd Half
Distance13.11 mi
Time1:28:32
Pace6:45 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:5620:026:2720:02
6:27
-
10K
6.21 mi10:41:1240:186:2920:16
6:31
+0:04
15K
9.32 mi11:01:281:00:346:3020:16
6:31
0:00
20K
12.43 mi11:21:551:21:016:3120:27
6:35
+0:04
Half
13.11 mi11:26:201:25:266:314:25
6:28
-0:07
25K
15.53 mi11:42:171:41:236:3215:57
6:35
+0:07
30K
18.64 mi12:03:102:02:166:3420:53
6:43
+0:08
20M
20.00 mi12:12:272:11:336:359:17
6:50
+0:07
21M
21.00 mi12:19:422:18:486:377:15
7:15
+0:25
35K
21.75 mi12:24:422:23:486:375:00
6:41
-0:34
23M
23.00 mi12:33:212:32:276:388:39
6:55
+0:14
24M
24.00 mi12:40:022:39:086:386:41
6:41
-0:14
40K
24.85 mi12:45:432:44:496:385:41
6:39
-0:02
25.2M
25.20 mi12:48:132:47:196:382:30
7:15
+0:36
Finish
26.22 mi12:54:522:53:586:386:39
6:32
-0:43

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

6:27 /mi

Average Pace

6:38 /mi

Slowest Pace

7:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:13

94% of race

Time at Steady Pace

9:45

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:38 /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 mi10:20:5620:026:2720:02
6:27
#3445
10K
6.21 mi10:41:1240:186:2920:16
6:31
#3668
15K
9.32 mi11:01:281:00:346:3020:16
6:31
#3679
20K
12.43 mi11:21:551:21:016:3120:27
6:35
#3647
Half
13.11 mi11:26:201:25:266:314:25
6:28
#3639
25K
15.53 mi11:42:171:41:236:3215:57
6:35
#3557
30K
18.64 mi12:03:102:02:166:3420:53
6:43
#3380
20M
20.00 mi12:12:272:11:336:359:17
6:50
#3318
21M
21.00 mi12:19:422:18:486:377:15
7:15
#3286
35K
21.75 mi12:24:422:23:486:375:00
6:41
#3273
23M
23.00 mi12:33:212:32:276:388:39
6:55
#3213
24M
24.00 mi12:40:022:39:086:386:41
6:41
#3165
40K
24.85 mi12:45:432:44:496:385:41
6:39
#3073
25.2M
25.20 mi12:48:132:47:196:382:30
7:15
#3037
Finish
26.22 mi12:54:522:53:586:386:39
6:32
#2996
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3445327232723697(Top 13%)3490(Top 22%)3490(Top 62%)
10K6.21 mi3.10 mi3668-2233476-2043476-2043888(Top 14%)3662(Top 23%)3662(Top 65%)
15K9.32 mi3.11 mi3679-113479-33479-33697(Top 13%)3490(Top 22%)3490(Top 62%)
20K12.43 mi3.11 mi3647+323450+293450+293584(Top 13%)3388(Top 21%)3388(Top 60%)
Half13.11 mi0.68 mi3639+83443+73443+73464(Top 12%)3280(Top 20%)3280(Top 58%)
25K15.53 mi2.42 mi3557+823366+773366+773318(Top 12%)3137(Top 19%)3137(Top 56%)
30K18.64 mi3.11 mi3380+1773198+1683198+1682984(Top 11%)2806(Top 17%)2806(Top 50%)
20M20.00 mi1.36 mi3318+623139+593139+593105(Top 11%)2881(Top 18%)2881(Top 51%)
21M21.00 mi1.00 mi3286+323108+313108+313345(Top 12%)3067(Top 19%)3067(Top 54%)
35K21.75 mi0.75 mi3273+133090+183090+183366(Top 12%)3065(Top 19%)3065(Top 54%)
23M23.00 mi1.25 mi3213+603032+583032+583231(Top 11%)2942(Top 18%)2942(Top 52%)
24M24.00 mi1.00 mi3165+482988+442988+442880(Top 10%)2620(Top 16%)2620(Top 46%)
40K24.85 mi0.85 mi3073+922900+882900+882149(Top 8%)1975(Top 12%)1975(Top 35%)
25.2M25.20 mi0.35 mi3037+362865+352865+352316(Top 8%)2069(Top 13%)2069(Top 37%)
Finish26.22 mi1.02 mi2996+412824+412824+412931(Top 10%)2612(Top 16%)2612(Top 46%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21story building
+97ft-345ft

Overall

3697

Males

3490

M18-39

3490

5K→10K

3.1 - 6.2 mi

Top 14%
×5story building
+79ft-138ft

Overall

3888

Males

3662

M18-39

3662

10K→15K

6.2 - 9.3 mi

Top 13%
×3story building
+67ft-78ft

Overall

3697

Males

3490

M18-39

3490

15K→20K

9.3 - 12.4 mi

Top 13%
×5story building
+106ft-86ft

Overall

3584

Males

3388

M18-39

3388

20K→Half

12.4 - 13.1 mi

Top 12%
×2story building
+19ft-37ft

Overall

3464

Males

3280

M18-39

3280

Half→25K

13.1 - 15.5 mi

Top 12%
×4story building
+66ft-88ft

Overall

3318

Males

3137

M18-39

3137

25K→30K

15.5 - 18.6 mi

Top 11%
×9story building
+181ft-148ft

Overall

2984

Males

2806

M18-39

2806

30K→20M

18.6 - 20.0 mi

Top 11%
×5story building
+64ft-50ft

Overall

3105

Males

2881

M18-39

2881

20M→21M

20.0 - 21.0 mi

Top 12%
×8story building
+106ft-24ft

Overall

3345

Males

3067

M18-39

3067

21M→35K

21.0 - 21.8 mi

Top 12%
×7story building
+17ft-86ft

Overall

3366

Males

3065

M18-39

3065

35K→23M

21.8 - 23.0 mi

Top 11%
×5story building
+23ft-63ft

Overall

3231

Males

2942

M18-39

2942

23M→24M

23.0 - 24.0 mi

Top 10%
×6story building
+12ft-82ft

Overall

2880

Males

2620

M18-39

2620

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2149

Males

1975

M18-39

1975

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2316

Males

2069

M18-39

2069

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2story building
+22ft-21ft

Overall

2931

Males

2612

M18-39

2612

Passing Analysis

Category:
Athletes Passed
1142
Passed By
693
Net Change
+449
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3445
5K → 10K43266-223#3445#3668
10K → 15K107118-11#3668#3679
15K → 20K10775+32#3679#3647
20K → Half2012+8#3647#3639
Half → 25K11028+82#3639#3557
25K → 30K20427+177#3557#3380
30K → 20M9230+62#3380#3318
20M → 21M6735+32#3318#3286
21M → 35K3825+13#3286#3273
35K → 23M9434+60#3273#3213
23M → 24M6517+48#3213#3165
24M → 40K986+92#3165#3073
40K → 25.2M404+36#3073#3037
25.2M → Finish5716+41#3037#2996
TOTALS1142693+449
📊

Passing Visuals

Category:
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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