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BOSTON MARATHON 2025

Joakim Nielsen

Bib: 5255•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Male)
#0 / 16105
Top 20%
Division (M18-39)
#0 / 5642
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:24
Rank: #4325
Start → 5K
20:24 | 6:34/mi
10K· 6.21 mi
40:28
Rank: #3877 (+448)
5K → 10K
20:04 | 6:28/mi
15K· 9.32 mi
1:00:39
Rank: #3750 (+127)
10K → 15K
20:11 | 6:30/mi
20K· 12.43 mi
1:21:27
Rank: #3845 (-95)
15K → 20K
20:48 | 6:42/mi
Half· 13.11 mi
1:25:57
Rank: #3862 (-17)
20K → Half
4:30 | 6:36/mi
25K· 15.53 mi
1:42:16
Rank: #3897 (-35)
Half → 25K
16:19 | 6:44/mi
30K· 18.64 mi
2:03:43
Rank: #3871 (+26)
25K → 30K
21:27 | 6:54/mi
20M
2:13:13
Rank: #3842 (+29)
30K → 20M
9:30 | 6:59/mi
21M
2:20:30
Rank: #3793 (+49)
20M → 21M
7:17 | 7:17/mi
35K· 21.75 mi
2:25:30
Rank: #3764 (+29)
21M → 35K
5:00 | 6:41/mi
23M
2:34:03
Rank: #3664 (+100)
35K → 23M
8:33 | 6:50/mi
24M
2:40:40
Rank: #3561 (+103)
23M → 24M
6:37 | 6:37/mi
40K· 24.85 mi
2:46:27
Rank: #3487 (+74)
24M → 40K
5:47 | 6:46/mi
25.2M
2:49:00
Rank: #3458 (+29)
40K → 25.2M
2:33 | 7:24/mi
Finish· 26.22 mi
2:55:44
Rank: #3416 (+42)
25.2M → Finish
6:44 | 6:36/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:25:57
Pace6:33 /mi
2nd Half
Distance13.11 mi
Time1:29:47
Pace6:51 /mi
📊Positive Split: 4.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:5820:246:3420:24
6:34
-
10K
6.21 mi10:44:0240:286:3120:04
6:28
-0:06
15K
9.32 mi11:04:131:00:396:3020:11
6:30
+0:02
20K
12.43 mi11:25:011:21:276:3320:48
6:42
+0:12
Half
13.11 mi11:29:311:25:576:334:30
6:36
-0:06
25K
15.53 mi11:45:501:42:166:3516:19
6:44
+0:08
30K
18.64 mi12:07:172:03:436:3821:27
6:54
+0:10
20M
20.00 mi12:16:472:13:136:409:30
6:59
+0:05
21M
21.00 mi12:24:042:20:306:417:17
7:17
+0:18
35K
21.75 mi12:29:042:25:306:415:00
6:41
-0:36
23M
23.00 mi12:37:372:34:036:428:33
6:50
+0:09
24M
24.00 mi12:44:142:40:406:426:37
6:37
-0:13
40K
24.85 mi12:50:012:46:276:425:47
6:46
+0:09
25.2M
25.20 mi12:52:342:49:006:422:33
7:24
+0:38
Finish
26.22 mi12:59:182:55:446:426:44
6:36
-0:48

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

6:28 /mi

Average Pace

6:42 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:45:54

94% of race

Time at Steady Pace

9:50

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:42 /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 mi10:23:5820:246:3420:24
6:34
#4325
10K
6.21 mi10:44:0240:286:3120:04
6:28
#3877
15K
9.32 mi11:04:131:00:396:3020:11
6:30
#3750
20K
12.43 mi11:25:011:21:276:3320:48
6:42
#3845
Half
13.11 mi11:29:311:25:576:334:30
6:36
#3862
25K
15.53 mi11:45:501:42:166:3516:19
6:44
#3897
30K
18.64 mi12:07:172:03:436:3821:27
6:54
#3871
20M
20.00 mi12:16:472:13:136:409:30
6:59
#3842
21M
21.00 mi12:24:042:20:306:417:17
7:17
#3793
35K
21.75 mi12:29:042:25:306:415:00
6:41
#3764
23M
23.00 mi12:37:372:34:036:428:33
6:50
#3664
24M
24.00 mi12:44:142:40:406:426:37
6:37
#3561
40K
24.85 mi12:50:012:46:276:425:47
6:46
#3487
25.2M
25.20 mi12:52:342:49:006:422:33
7:24
#3458
Finish
26.22 mi12:59:182:55:446:426:44
6:36
#3416
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4325406640663556(Top 13%)3363(Top 21%)3363(Top 60%)
10K6.21 mi3.10 mi3877+4483667+3993667+3993439(Top 12%)3263(Top 20%)3263(Top 58%)
15K9.32 mi3.11 mi3750+1273544+1233544+1233556(Top 13%)3363(Top 21%)3363(Top 60%)
20K12.43 mi3.11 mi3845-953625-813625-814389(Top 15%)4103(Top 25%)4103(Top 73%)
Half13.11 mi0.68 mi3862-173639-143639-144383(Top 15%)4105(Top 25%)4105(Top 73%)
25K15.53 mi2.42 mi3897-353673-343673-344351(Top 15%)4033(Top 25%)4033(Top 71%)
30K18.64 mi3.11 mi3871+263644+293644+294111(Top 14%)3782(Top 23%)3782(Top 67%)
20M20.00 mi1.36 mi3842+293614+303614+304063(Top 14%)3723(Top 23%)3723(Top 66%)
21M21.00 mi1.00 mi3793+493565+493565+493556(Top 13%)3255(Top 20%)3255(Top 58%)
35K21.75 mi0.75 mi3764+293537+283537+283431(Top 12%)3130(Top 19%)3130(Top 55%)
23M23.00 mi1.25 mi3664+1003440+973440+972864(Top 10%)2626(Top 16%)2626(Top 47%)
24M24.00 mi1.00 mi3561+1033341+993341+992581(Top 9%)2375(Top 15%)2375(Top 42%)
40K24.85 mi0.85 mi3487+743267+743267+742690(Top 9%)2447(Top 15%)2447(Top 43%)
25.2M25.20 mi0.35 mi3458+293237+303237+302965(Top 10%)2644(Top 16%)2644(Top 47%)
Finish26.22 mi1.02 mi3416+423197+403197+403377(Top 12%)2961(Top 18%)2961(Top 52%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3556

Males

3363

M18-39

3363

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3439

Males

3263

M18-39

3263

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3556

Males

3363

M18-39

3363

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4389

Males

4103

M18-39

4103

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4383

Males

4105

M18-39

4105

Half→25K

13.1 - 15.5 mi

Top 15%
×4stories
+66ft-88ft

Overall

4351

Males

4033

M18-39

4033

25K→30K

15.5 - 18.6 mi

Top 14%
×9stories
+181ft-148ft

Overall

4111

Males

3782

M18-39

3782

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

4063

Males

3723

M18-39

3723

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3556

Males

3255

M18-39

3255

21M→35K

21.0 - 21.8 mi

Top 12%
×7stories
+17ft-86ft

Overall

3431

Males

3130

M18-39

3130

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2864

Males

2626

M18-39

2626

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2581

Males

2375

M18-39

2375

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2690

Males

2447

M18-39

2447

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2965

Males

2644

M18-39

2644

25.2M→Finish

25.2 - 26.2 mi

Top 12%
×2stories
+22ft-21ft

Overall

3377

Males

2961

M18-39

2961

Passing Analysis

Category:
Athletes Passed
1526
Passed By
617
Net Change
+909
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4325
5K → 10K47830+448#4325#3877
10K → 15K16942+127#3877#3750
15K → 20K62157-95#3750#3845
20K → Half926-17#3845#3862
Half → 25K6398-35#3862#3897
25K → 30K12599+26#3897#3871
30K → 20M7041+29#3871#3842
20M → 21M8435+49#3842#3793
21M → 35K4314+29#3793#3764
35K → 23M11414+100#3764#3664
23M → 24M1129+103#3664#3561
24M → 40K9117+74#3561#3487
40K → 25.2M389+29#3487#3458
25.2M → Finish6826+42#3458#3416
TOTALS1526617+909
📊

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