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BOSTON MARATHON 2025

Nicolai Kolb

Bib: 6894•M

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 15%
Gender (Male)
#0 / 16105
Top 25%
Division (M18-39)
#0 / 5642
Top 50%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:41
Rank: #5083
Start → 5K
20:41 | 6:39/mi
10K· 6.21 mi
41:22
Rank: #4985 (+98)
5K → 10K
20:41 | 6:39/mi
15K· 9.32 mi
1:02:12
Rank: #4988 (-3)
10K → 15K
20:50 | 6:42/mi
20K· 12.43 mi
1:23:10
Rank: #4924 (+64)
15K → 20K
20:58 | 6:45/mi
Half· 13.11 mi
1:27:39
Rank: #4888 (+36)
20K → Half
4:29 | 6:34/mi
25K· 15.53 mi
1:44:13
Rank: #4878 (+10)
Half → 25K
16:34 | 6:50/mi
30K· 18.64 mi
2:05:46
Rank: #4717 (+161)
25K → 30K
21:33 | 6:56/mi
20M
2:15:12
Rank: #4600 (+117)
30K → 20M
9:26 | 6:57/mi
21M
2:22:34
Rank: #4519 (+81)
20M → 21M
7:22 | 7:22/mi
35K· 21.75 mi
2:27:43
Rank: #4500 (+19)
21M → 35K
5:09 | 6:53/mi
23M
2:36:28
Rank: #4408 (+92)
35K → 23M
8:45 | 6:59/mi
24M
2:43:22
Rank: #4369 (+39)
23M → 24M
6:54 | 6:54/mi
40K· 24.85 mi
2:49:18
Rank: #4316 (+53)
24M → 40K
5:56 | 6:56/mi
25.2M
2:51:53
Rank: #4281 (+35)
40K → 25.2M
2:35 | 7:29/mi
Finish· 26.22 mi
2:58:51
Rank: #4295 (-14)
25.2M → Finish
6:58 | 6:50/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:39
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:31:12
Pace6:57 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:27:3020:416:3920:41
6:39
-
10K
6.21 mi10:48:1141:226:3920:41
6:39
0:00
15K
9.32 mi11:09:011:02:126:4020:50
6:42
+0:03
20K
12.43 mi11:29:591:23:106:4220:58
6:45
+0:03
Half
13.11 mi11:34:281:27:396:414:29
6:34
-0:11
25K
15.53 mi11:51:021:44:136:4316:34
6:50
+0:16
30K
18.64 mi12:12:352:05:466:4521:33
6:56
+0:06
20M
20.00 mi12:22:012:15:126:469:26
6:57
+0:01
21M
21.00 mi12:29:232:22:346:477:22
7:22
+0:25
35K
21.75 mi12:34:322:27:436:485:09
6:53
-0:29
23M
23.00 mi12:43:172:36:286:488:45
6:59
+0:06
24M
24.00 mi12:50:112:43:226:486:54
6:54
-0:05
40K
24.85 mi12:56:072:49:186:495:56
6:56
+0:02
25.2M
25.20 mi12:58:422:51:536:492:35
7:29
+0:33
Finish
26.22 mi13:05:402:58:516:506:58
6:50
-0:39

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

6:34 /mi

Average Pace

6:50 /mi

Slowest Pace

7:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:54

94% of race

Time at Steady Pace

9:57

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:49 /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 mi10:27:3020:416:3920:41
6:39
#5083
10K
6.21 mi10:48:1141:226:3920:41
6:39
#4985
15K
9.32 mi11:09:011:02:126:4020:50
6:42
#4988
20K
12.43 mi11:29:591:23:106:4220:58
6:45
#4924
Half
13.11 mi11:34:281:27:396:414:29
6:34
#4888
25K
15.53 mi11:51:021:44:136:4316:34
6:50
#4878
30K
18.64 mi12:12:352:05:466:4521:33
6:56
#4717
20M
20.00 mi12:22:012:15:126:469:26
6:57
#4600
21M
21.00 mi12:29:232:22:346:477:22
7:22
#4519
35K
21.75 mi12:34:322:27:436:485:09
6:53
#4500
23M
23.00 mi12:43:172:36:286:488:45
6:59
#4408
24M
24.00 mi12:50:112:43:226:486:54
6:54
#4369
40K
24.85 mi12:56:072:49:186:495:56
6:56
#4316
25.2M
25.20 mi12:58:422:51:536:492:35
7:29
#4281
Finish
26.22 mi13:05:402:58:516:506:58
6:50
#4295
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5083474547455132(Top 18%)4757(Top 30%)4757(Top 84%)
10K6.21 mi3.10 mi4985+984649+964649+964945(Top 17%)4615(Top 29%)4615(Top 82%)
15K9.32 mi3.11 mi4988-34652-34652-35132(Top 18%)4757(Top 30%)4757(Top 84%)
20K12.43 mi3.11 mi4924+644590+624590+624834(Top 17%)4473(Top 28%)4473(Top 79%)
Half13.11 mi0.68 mi4888+364555+354555+354209(Top 15%)3948(Top 25%)3948(Top 70%)
25K15.53 mi2.42 mi4878+104534+214534+215133(Top 18%)4708(Top 29%)4708(Top 83%)
30K18.64 mi3.11 mi4717+1614377+1574377+1574317(Top 15%)3960(Top 25%)3960(Top 70%)
20M20.00 mi1.36 mi4600+1174267+1104267+1103779(Top 13%)3478(Top 22%)3478(Top 62%)
21M21.00 mi1.00 mi4519+814193+744193+743955(Top 14%)3590(Top 22%)3590(Top 64%)
35K21.75 mi0.75 mi4500+194170+234170+234628(Top 16%)4106(Top 25%)4106(Top 73%)
23M23.00 mi1.25 mi4408+924080+904080+903708(Top 13%)3352(Top 21%)3352(Top 59%)
24M24.00 mi1.00 mi4369+394036+444036+444097(Top 14%)3614(Top 22%)3614(Top 64%)
40K24.85 mi0.85 mi4316+533981+553981+553584(Top 13%)3180(Top 20%)3180(Top 56%)
25.2M25.20 mi0.35 mi4281+353946+353946+353405(Top 12%)2995(Top 19%)2995(Top 53%)
Finish26.22 mi1.02 mi4295-143952-63952-64712(Top 17%)3936(Top 24%)3936(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

5132

Males

4757

M18-39

4757

5K→10K

3.1 - 6.2 mi

Top 17%
×5stories
+79ft-138ft

Overall

4945

Males

4615

M18-39

4615

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

5132

Males

4757

M18-39

4757

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4834

Males

4473

M18-39

4473

20K→Half

12.4 - 13.1 mi

Top 15%
×2stories
+19ft-37ft

Overall

4209

Males

3948

M18-39

3948

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

5133

Males

4708

M18-39

4708

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4317

Males

3960

M18-39

3960

30K→20M

18.6 - 20.0 mi

Top 13%
×5stories
+64ft-50ft

Overall

3779

Males

3478

M18-39

3478

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3955

Males

3590

M18-39

3590

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4628

Males

4106

M18-39

4106

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3708

Males

3352

M18-39

3352

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

4097

Males

3614

M18-39

3614

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3584

Males

3180

M18-39

3180

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3405

Males

2995

M18-39

2995

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2stories
+22ft-21ft

Overall

4712

Males

3936

M18-39

3936

Passing Analysis

Category:
Athletes Passed
1541
Passed By
753
Net Change
+788
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5083
5K → 10K229131+98#5083#4985
10K → 15K120123-3#4985#4988
15K → 20K15894+64#4988#4924
20K → Half4610+36#4924#4888
Half → 25K110100+10#4888#4878
25K → 30K24079+161#4878#4717
30K → 20M13619+117#4717#4600
20M → 21M11635+81#4600#4519
21M → 35K5132+19#4519#4500
35K → 23M11321+92#4500#4408
23M → 24M7132+39#4408#4369
24M → 40K7320+53#4369#4316
40K → 25.2M383+35#4316#4281
25.2M → Finish4054-14#4281#4295
TOTALS1541753+788
📊

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