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BOSTON MARATHON 2025

David Nilsson

Bib: 4287•M

UT

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
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
19:56
Rank: #3245
Start → 5K
19:56 | 6:25/mi
10K· 6.21 mi
40:58
Rank: #4452 (-1207)
5K → 10K
21:02 | 6:46/mi
15K· 9.32 mi
1:02:57
Rank: #5755 (-1303)
10K → 15K
21:59 | 7:05/mi
20K· 12.43 mi
1:25:45
Rank: #6816 (-1061)
15K → 20K
22:48 | 7:20/mi
Half· 13.11 mi
1:30:43
Rank: #6986 (-170)
20K → Half
4:58 | 7:17/mi
25K· 15.53 mi
1:48:39
Rank: #7225 (-239)
Half → 25K
17:56 | 7:24/mi
30K· 18.64 mi
2:11:58
Rank: #7209 (+16)
25K → 30K
23:19 | 7:30/mi
20M
2:22:29
Rank: #7221 (-12)
30K → 20M
10:31 | 7:44/mi
21M
2:30:43
Rank: #7240 (-19)
20M → 21M
8:14 | 8:14/mi
35K· 21.75 mi
2:36:18
Rank: #7231 (+9)
21M → 35K
5:35 | 7:28/mi
23M
2:46:17
Rank: #7319 (-88)
35K → 23M
9:59 | 7:58/mi
24M
2:54:09
Rank: #7400 (-81)
23M → 24M
7:52 | 7:52/mi
40K· 24.85 mi
3:00:52
Rank: #7407 (-7)
24M → 40K
6:43 | 7:51/mi
25.2M
3:03:54
Rank: #7445 (-38)
40K → 25.2M
3:02 | 8:48/mi
Finish· 26.22 mi
3:12:06
Rank: #7635 (-190)
25.2M → Finish
8:12 | 8:03/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:43
Pace6:55 /mi
2nd Half
Distance13.11 mi
Time1:41:23
Pace7:44 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:5419:566:2519:56
6:25
-
10K
6.21 mi10:42:5640:586:3621:02
6:46
+0:21
15K
9.32 mi11:04:551:02:576:4521:59
7:05
+0:19
20K
12.43 mi11:27:431:25:456:5422:48
7:20
+0:15
Half
13.11 mi11:32:411:30:436:554:58
7:17
-0:03
25K
15.53 mi11:50:371:48:397:0017:56
7:24
+0:07
30K
18.64 mi12:13:562:11:587:0523:19
7:30
+0:06
20M
20.00 mi12:24:272:22:297:0710:31
7:44
+0:14
21M
21.00 mi12:32:412:30:437:118:14
8:14
+0:30
35K
21.75 mi12:38:162:36:187:115:35
7:28
-0:46
23M
23.00 mi12:48:152:46:177:149:59
7:58
+0:30
24M
24.00 mi12:56:072:54:097:157:52
7:52
-0:06
40K
24.85 mi13:02:503:00:527:176:43
7:51
-0:01
25.2M
25.20 mi13:05:523:03:547:183:02
8:48
+0:57
Finish
26.22 mi13:14:043:12:067:208:12
8:03
-0:45

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

6:25 /mi

Average Pace

7:20 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:02:57

33% of race

Time at Steady Pace

1:25:07

44% of race

Time at Slower Pace

44:02

23% of race

Average Pace: 7:20 /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 mi10:21:5419:566:2519:56
6:25
#3245
10K
6.21 mi10:42:5640:586:3621:02
6:46
#4452
15K
9.32 mi11:04:551:02:576:4521:59
7:05
#5755
20K
12.43 mi11:27:431:25:456:5422:48
7:20
#6816
Half
13.11 mi11:32:411:30:436:554:58
7:17
#6986
25K
15.53 mi11:50:371:48:397:0017:56
7:24
#7225
30K
18.64 mi12:13:562:11:587:0523:19
7:30
#7209
20M
20.00 mi12:24:272:22:297:0710:31
7:44
#7221
21M
21.00 mi12:32:412:30:437:118:14
8:14
#7240
35K
21.75 mi12:38:162:36:187:115:35
7:28
#7231
23M
23.00 mi12:48:152:46:177:149:59
7:58
#7319
24M
24.00 mi12:56:072:54:097:157:52
7:52
#7400
40K
24.85 mi13:02:503:00:527:176:43
7:51
#7407
25.2M
25.20 mi13:05:523:03:547:183:02
8:48
#7445
Finish
26.22 mi13:14:043:12:067:208:12
8:03
#7635
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3245308430848152(Top 29%)7033(Top 44%)7033(Top 125%)
10K6.21 mi3.10 mi4452-12074187-11034187-11036063(Top 21%)5540(Top 34%)5540(Top 98%)
15K9.32 mi3.11 mi5755-13035294-11075294-11078152(Top 29%)7033(Top 44%)7033(Top 125%)
20K12.43 mi3.11 mi6816-10616140-8466140-8469336(Top 33%)7644(Top 47%)7644(Top 135%)
Half13.11 mi0.68 mi6986-1706263-1236263-1239725(Top 34%)7853(Top 49%)7853(Top 139%)
25K15.53 mi2.42 mi7225-2396417-1546417-1549099(Top 32%)7391(Top 46%)7391(Top 131%)
30K18.64 mi3.11 mi7209+166355+626355+627768(Top 27%)6449(Top 40%)6449(Top 114%)
20M20.00 mi1.36 mi7221-126335+206335+208601(Top 30%)6780(Top 42%)6780(Top 120%)
21M21.00 mi1.00 mi7240-196318+176318+178755(Top 31%)6674(Top 41%)6674(Top 118%)
35K21.75 mi0.75 mi7231+96291+276291+278323(Top 29%)6487(Top 40%)6487(Top 115%)
23M23.00 mi1.25 mi7319-886302-116302-119812(Top 35%)7130(Top 44%)7130(Top 126%)
24M24.00 mi1.00 mi7400-816322-206322-2010287(Top 36%)7307(Top 45%)7307(Top 130%)
40K24.85 mi0.85 mi7407-76300+226300+229146(Top 32%)6593(Top 41%)6593(Top 117%)
25.2M25.20 mi0.35 mi7445-386305-56305-510498(Top 37%)7190(Top 45%)7190(Top 127%)
Finish26.22 mi1.02 mi7635-1906394-896394-8913160(Top 46%)8583(Top 53%)8583(Top 152%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 29%
×21stories
+97ft-345ft

Overall

8152

Males

7033

M18-39

7033

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

6063

Males

5540

M18-39

5540

10K→15K

6.2 - 9.3 mi

Top 29%
×3stories
+67ft-78ft

Overall

8152

Males

7033

M18-39

7033

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9336

Males

7644

M18-39

7644

20K→Half

12.4 - 13.1 mi

Top 34%
×2stories
+19ft-37ft

Overall

9725

Males

7853

M18-39

7853

Half→25K

13.1 - 15.5 mi

Top 32%
×4stories
+66ft-88ft

Overall

9099

Males

7391

M18-39

7391

25K→30K

15.5 - 18.6 mi

Top 27%
×9stories
+181ft-148ft

Overall

7768

Males

6449

M18-39

6449

30K→20M

18.6 - 20.0 mi

Top 30%
×5stories
+64ft-50ft

Overall

8601

Males

6780

M18-39

6780

20M→21M

20.0 - 21.0 mi

Top 31%
×8stories
+106ft-24ft

Overall

8755

Males

6674

M18-39

6674

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8323

Males

6487

M18-39

6487

35K→23M

21.8 - 23.0 mi

Top 35%
×5stories
+23ft-63ft

Overall

9812

Males

7130

M18-39

7130

23M→24M

23.0 - 24.0 mi

Top 36%
×6stories
+12ft-82ft

Overall

10287

Males

7307

M18-39

7307

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

9146

Males

6593

M18-39

6593

40K→25.2M

24.9 - 25.2 mi

Top 37%
×1story
+13ft-16ft

Overall

10498

Males

7190

M18-39

7190

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

13160

Males

8583

M18-39

8583

Passing Analysis

Category:
Athletes Passed
719
Passed By
5109
Net Change
-4390
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3245
5K → 10K01207-1207#3245#4452
10K → 15K91312-1303#4452#5755
15K → 20K151076-1061#5755#6816
20K → Half3173-170#6816#6986
Half → 25K65304-239#6986#7225
25K → 30K182166+16#7225#7209
30K → 20M92104-12#7209#7221
20M → 21M7796-19#7221#7240
21M → 35K5647+9#7240#7231
35K → 23M65153-88#7231#7319
23M → 24M45126-81#7319#7400
24M → 40K7380-7#7400#7407
40K → 25.2M1654-38#7407#7445
25.2M → Finish21211-190#7445#7635
TOTALS7195109-4390
📊

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