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BOSTON MARATHON 2025

Alex Niederloh

Bib: 2518•M

CO

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 4%
Division (M18-39)
#0 / 5642
Top 10%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:30
Rank: #2266
Start → 5K
19:30 | 6:17/mi
10K· 6.21 mi
38:31
Rank: #1856 (+410)
5K → 10K
19:01 | 6:07/mi
15K· 9.32 mi
57:31
Rank: #1704 (+152)
10K → 15K
19:00 | 6:07/mi
20K· 12.43 mi
1:16:38
Rank: #1601 (+103)
15K → 20K
19:07 | 6:09/mi
Half· 13.11 mi
1:20:44
Rank: #1573 (+28)
20K → Half
4:06 | 6:01/mi
25K· 15.53 mi
1:35:36
Rank: #1484 (+89)
Half → 25K
14:52 | 6:08/mi
30K· 18.64 mi
1:54:31
Rank: #1285 (+199)
25K → 30K
18:55 | 6:05/mi
20M
2:02:40
Rank: #1158 (+127)
30K → 20M
8:09 | 6:00/mi
21M
2:08:42
Rank: #1018 (+140)
20M → 21M
6:02 | 6:02/mi
35K· 21.75 mi
2:12:57
Rank: #963 (+55)
21M → 35K
4:15 | 5:41/mi
23M
2:20:10
Rank: #857 (+106)
35K → 23M
7:13 | 5:46/mi
24M
2:25:57
Rank: #807 (+50)
23M → 24M
5:47 | 5:47/mi
40K· 24.85 mi
2:30:59
Rank: #768 (+39)
24M → 40K
5:02 | 5:53/mi
25.2M
2:33:07
Rank: #739 (+29)
40K → 25.2M
2:08 | 6:11/mi
Finish· 26.22 mi
2:38:40
Rank: #689 (+50)
25.2M → Finish
5:33 | 5:27/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:20:44
Pace6:09 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:17:56
Pace5:57 /mi
📊Negative Split: 3.5% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:0619:306:1719:30
6:17
-
10K
6.21 mi10:40:0738:316:1219:01
6:07
-0:10
15K
9.32 mi10:59:0757:316:1019:00
6:07
0:00
20K
12.43 mi11:18:141:16:386:1019:07
6:09
+0:02
Half
13.11 mi11:22:201:20:446:094:06
6:01
-0:08
25K
15.53 mi11:37:121:35:366:0914:52
6:08
+0:07
30K
18.64 mi11:56:071:54:316:0918:55
6:05
-0:03
20M
20.00 mi12:04:162:02:406:088:09
6:00
-0:05
21M
21.00 mi12:10:182:08:426:086:02
6:02
+0:02
35K
21.75 mi12:14:332:12:576:074:15
5:41
-0:21
23M
23.00 mi12:21:462:20:106:067:13
5:46
+0:05
24M
24.00 mi12:27:332:25:576:055:47
5:47
+0:01
40K
24.85 mi12:32:352:30:596:045:02
5:53
+0:06
25.2M
25.20 mi12:34:432:33:076:052:08
6:11
+0:18
Finish
26.22 mi12:40:162:38:406:035:33
5:27
-0:44

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

5:27 /mi

Average Pace

6:03 /mi

Slowest Pace

6:17 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

27:50

18% of race

Time at Steady Pace

2:10:50

82% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:03 /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 mi10:21:0619:306:1719:30
6:17
#2266
10K
6.21 mi10:40:0738:316:1219:01
6:07
#1856
15K
9.32 mi10:59:0757:316:1019:00
6:07
#1704
20K
12.43 mi11:18:141:16:386:1019:07
6:09
#1601
Half
13.11 mi11:22:201:20:446:094:06
6:01
#1573
25K
15.53 mi11:37:121:35:366:0914:52
6:08
#1484
30K
18.64 mi11:56:071:54:316:0918:55
6:05
#1285
20M
20.00 mi12:04:162:02:406:088:09
6:00
#1158
21M
21.00 mi12:10:182:08:426:086:02
6:02
#1018
35K
21.75 mi12:14:332:12:576:074:15
5:41
#963
23M
23.00 mi12:21:462:20:106:067:13
5:46
#857
24M
24.00 mi12:27:332:25:576:055:47
5:47
#807
40K
24.85 mi12:32:352:30:596:045:02
5:53
#768
25.2M
25.20 mi12:34:432:33:076:052:08
6:11
#739
Finish
26.22 mi12:40:162:38:406:035:33
5:27
#689
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2266216321631443(Top 5%)1372(Top 9%)1372(Top 24%)
10K6.21 mi3.10 mi1856+4101766+3971766+3971537(Top 5%)1460(Top 9%)1460(Top 26%)
15K9.32 mi3.11 mi1704+1521620+1461620+1461443(Top 5%)1372(Top 9%)1372(Top 24%)
20K12.43 mi3.11 mi1601+1031519+1011519+1011372(Top 5%)1299(Top 8%)1299(Top 23%)
Half13.11 mi0.68 mi1573+281494+251494+251141(Top 4%)1078(Top 7%)1078(Top 19%)
25K15.53 mi2.42 mi1484+891405+891405+891192(Top 4%)1125(Top 7%)1125(Top 20%)
30K18.64 mi3.11 mi1285+1991213+1921213+192654(Top 2%)612(Top 4%)612(Top 11%)
20M20.00 mi1.36 mi1158+1271092+1211092+121386(Top 1%)361(Top 2%)361(Top 6%)
21M21.00 mi1.00 mi1018+140958+134958+134150(Top 0.5%)139(Top 0.9%)139(Top 2%)
35K21.75 mi0.75 mi963+55906+52906+52252(Top 0.9%)232(Top 1%)232(Top 4%)
23M23.00 mi1.25 mi857+106804+102804+102142(Top 0.5%)133(Top 0.8%)133(Top 2%)
24M24.00 mi1.00 mi807+50756+48756+48271(Top 1.0%)249(Top 2%)249(Top 4%)
40K24.85 mi0.85 mi768+39718+38718+38271(Top 1.0%)250(Top 2%)250(Top 4%)
25.2M25.20 mi0.35 mi739+29690+28690+28158(Top 0.6%)150(Top 0.9%)150(Top 3%)
Finish26.22 mi1.02 mi689+50640+50640+50116(Top 0.4%)111(Top 0.7%)111(Top 2%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 5%
×21stories
+97ft-345ft

Overall

1443

Males

1372

M18-39

1372

5K→10K

3.1 - 6.2 mi

Top 5%
×5stories
+79ft-138ft

Overall

1537

Males

1460

M18-39

1460

10K→15K

6.2 - 9.3 mi

Top 5%
×3stories
+67ft-78ft

Overall

1443

Males

1372

M18-39

1372

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1372

Males

1299

M18-39

1299

20K→Half

12.4 - 13.1 mi

Top 4%
×2stories
+19ft-37ft

Overall

1141

Males

1078

M18-39

1078

Half→25K

13.1 - 15.5 mi

Top 4%
×4stories
+66ft-88ft

Overall

1192

Males

1125

M18-39

1125

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

654

Males

612

M18-39

612

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

386

Males

361

M18-39

361

20M→21M

20.0 - 21.0 mi

Top 0.5%
×8stories
+106ft-24ft

Overall

150

Males

139

M18-39

139

21M→35K

21.0 - 21.8 mi

Top 0.9%
×7stories
+17ft-86ft

Overall

252

Males

232

M18-39

232

35K→23M

21.8 - 23.0 mi

Top 0.5%
×5stories
+23ft-63ft

Overall

142

Males

133

M18-39

133

23M→24M

23.0 - 24.0 mi

Top 1.0%
×6stories
+12ft-82ft

Overall

271

Males

249

M18-39

249

24M→40K

24.0 - 24.9 mi

Top 1.0%
×1story
+6ft-20ft

Overall

271

Males

250

M18-39

250

40K→25.2M

24.9 - 25.2 mi

Top 0.6%
×1story
+13ft-16ft

Overall

158

Males

150

M18-39

150

25.2M→Finish

25.2 - 26.2 mi

Top 0.4%
×2stories
+22ft-21ft

Overall

116

Males

111

M18-39

111

Passing Analysis

Category:
Athletes Passed
1617
Passed By
40
Net Change
+1577
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2266
5K → 10K42414+410#2266#1856
10K → 15K16311+152#1856#1704
15K → 20K1129+103#1704#1601
20K → Half291+28#1601#1573
Half → 25K923+89#1573#1484
25K → 30K2001+199#1484#1285
30K → 20M1270+127#1285#1158
20M → 21M1400+140#1158#1018
21M → 35K550+55#1018#963
35K → 23M1060+106#963#857
23M → 24M511+50#857#807
24M → 40K390+39#807#768
40K → 25.2M290+29#768#739
25.2M → Finish500+50#739#689
TOTALS161740+1577
📊

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