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BOSTON MARATHON 2025

Ethan Britton

Bib: 4031•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
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
20:33
Rank: #4737
Start → 5K
20:33 | 6:37/mi
10K· 6.21 mi
41:35
Rank: #5299 (-562)
5K → 10K
21:02 | 6:46/mi
15K· 9.32 mi
1:04:42
Rank: #7388 (-2089)
10K → 15K
23:07 | 7:26/mi
20K· 12.43 mi
1:29:51
Rank: #9254 (-1866)
15K → 20K
25:09 | 8:06/mi
Half· 13.11 mi
1:35:08
Rank: #9462 (-208)
20K → Half
5:17 | 7:45/mi
25K· 15.53 mi
2:09:15
Rank: #17715 (-8253)
Half → 25K
34:07 | 14:04/mi
30K· 18.64 mi
4:02:51
Rank: #28081 (-10366)
25K → 30K
1:53:36 | 36:34/mi
20M
4:14:44
Rank: #27809 (+272)
30K → 20M
11:53 | 8:45/mi
21M
4:25:12
Rank: #27607 (+202)
20M → 21M
10:28 | 10:28/mi
35K· 21.75 mi
4:31:40
Rank: #27482 (+125)
21M → 35K
6:28 | 8:39/mi
23M
4:43:10
Rank: #27260 (+222)
35K → 23M
11:30 | 9:11/mi
24M
4:52:03
Rank: #27099 (+161)
23M → 24M
8:53 | 8:53/mi
40K· 24.85 mi
5:01:44
Rank: #27013 (+86)
24M → 40K
9:41 | 11:20/mi
25.2M
5:04:54
Rank: #26943 (+70)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
5:12:54
Rank: #26762 (+181)
25.2M → Finish
8:00 | 7:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:08
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time3:37:46
Pace16:37 /mi
📊Positive Split: 128.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1520:336:3720:33
6:37
-
10K
6.21 mi10:44:1741:356:4221:02
6:46
+0:09
15K
9.32 mi11:07:241:04:426:5623:07
7:26
+0:40
20K
12.43 mi11:32:331:29:517:1425:09
8:06
+0:40
Half
13.11 mi11:37:501:35:087:155:17
7:45
-0:21
25K
15.53 mi12:11:572:09:158:1934:07
14:04
+6:19
30K
18.64 mi14:05:334:02:5113:021:53:36
36:34
+22:30
20M
20.00 mi14:17:264:14:4412:4411:53
8:45
-27:49
21M
21.00 mi14:27:544:25:1212:3810:28
10:28
+1:43
35K
21.75 mi14:34:224:31:4012:296:28
8:39
-1:49
23M
23.00 mi14:45:524:43:1012:1911:30
9:11
+0:32
24M
24.00 mi14:54:454:52:0312:108:53
8:53
-0:18
40K
24.85 mi15:04:265:01:4412:089:41
11:20
+2:27
25.2M
25.20 mi15:07:365:04:5412:063:10
9:11
-2:09
Finish
26.22 mi15:15:365:12:5411:578:00
7:51
-1:20

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

6:37 /mi

Average Pace

11:57 /mi

Slowest Pace

36:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:45:11

53% of race

Time at Slower Pace

2:27:43

47% of race

Average Pace: 11:56 /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 mi10:23:1520:336:3720:33
6:37
#4737
10K
6.21 mi10:44:1741:356:4221:02
6:46
#5299
15K
9.32 mi11:07:241:04:426:5623:07
7:26
#7388
20K
12.43 mi11:32:331:29:517:1425:09
8:06
#9254
Half
13.11 mi11:37:501:35:087:155:17
7:45
#9462
25K
15.53 mi12:11:572:09:158:1934:07
14:04
#17715
30K
18.64 mi14:05:334:02:5113:021:53:36
36:34
#28081
20M
20.00 mi14:17:264:14:4412:4411:53
8:45
#27809
21M
21.00 mi14:27:544:25:1212:3810:28
10:28
#27607
35K
21.75 mi14:34:224:31:4012:296:28
8:39
#27482
23M
23.00 mi14:45:524:43:1012:1911:30
9:11
#27260
24M
24.00 mi14:54:454:52:0312:108:53
8:53
#27099
40K
24.85 mi15:04:265:01:4412:089:41
11:20
#27013
25.2M
25.20 mi15:07:365:04:5412:063:10
9:11
#26943
Finish
26.22 mi15:15:365:12:5411:578:00
7:51
#26762
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi47374445444511241(Top 40%)8719(Top 54%)8719(Top 155%)
10K6.21 mi3.10 mi5299-5624918-4734918-4736072(Top 21%)5549(Top 34%)5549(Top 98%)
15K9.32 mi3.11 mi7388-20896568-16506568-165011241(Top 40%)8719(Top 54%)8719(Top 155%)
20K12.43 mi3.11 mi9254-18667707-11397707-113915608(Top 55%)10593(Top 66%)10593(Top 188%)
Half13.11 mi0.68 mi9462-2087809-1027809-10213773(Top 48%)9822(Top 61%)9822(Top 174%)
25K15.53 mi2.42 mi17715-825311480-367111480-367127911(Top 98%)15883(Top 99%)15883(Top 282%)
30K18.64 mi3.11 mi28081-1036615978-449815978-449828404(Top 100%)16105(Top 100%)16105(Top 285%)
20M20.00 mi1.36 mi27809+27215861+11715861+11715346(Top 54%)10082(Top 63%)10082(Top 179%)
21M21.00 mi1.00 mi27607+20215761+10015761+10019900(Top 70%)12000(Top 75%)12000(Top 213%)
35K21.75 mi0.75 mi27482+12515708+5315708+5316329(Top 57%)10338(Top 64%)10338(Top 183%)
23M23.00 mi1.25 mi27260+22215605+10315605+10317261(Top 61%)10640(Top 66%)10640(Top 189%)
24M24.00 mi1.00 mi27099+16115535+7015535+7016752(Top 59%)10370(Top 64%)10370(Top 184%)
40K24.85 mi0.85 mi27013+8615498+3715498+3723818(Top 84%)13678(Top 85%)13678(Top 242%)
25.2M25.20 mi0.35 mi26943+7015462+3615462+3612821(Top 45%)8406(Top 52%)8406(Top 149%)
Finish26.22 mi1.02 mi26762+18115378+8415378+8411821(Top 42%)7959(Top 49%)7959(Top 141%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11241

Males

8719

M18-39

8719

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

6072

Males

5549

M18-39

5549

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11241

Males

8719

M18-39

8719

15K→20K

9.3 - 12.4 mi

Top 55%
×5stories
+106ft-86ft

Overall

15608

Males

10593

M18-39

10593

20K→Half

12.4 - 13.1 mi

Top 48%
×2stories
+19ft-37ft

Overall

13773

Males

9822

M18-39

9822

Half→25K

13.1 - 15.5 mi

Top 98%
×4stories
+66ft-88ft

Overall

27911

Males

15883

M18-39

15883

25K→30K

15.5 - 18.6 mi

Top 100%
×9stories
+181ft-148ft

Overall

28404

Males

16105

M18-39

16105

30K→20M

18.6 - 20.0 mi

Top 54%
×5stories
+64ft-50ft

Overall

15346

Males

10082

M18-39

10082

20M→21M

20.0 - 21.0 mi

Top 70%
×8stories
+106ft-24ft

Overall

19900

Males

12000

M18-39

12000

21M→35K

21.0 - 21.8 mi

Top 57%
×7stories
+17ft-86ft

Overall

16329

Males

10338

M18-39

10338

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

17261

Males

10640

M18-39

10640

23M→24M

23.0 - 24.0 mi

Top 59%
×6stories
+12ft-82ft

Overall

16752

Males

10370

M18-39

10370

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

23818

Males

13678

M18-39

13678

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12821

Males

8406

M18-39

8406

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

11821

Males

7959

M18-39

7959

Passing Analysis

Category:
Athletes Passed
1376
Passed By
23399
Net Change
-22025
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4737
5K → 10K40602-562#4737#5299
10K → 15K62095-2089#5299#7388
15K → 20K71873-1866#7388#9254
20K → Half3211-208#9254#9462
Half → 25K18252-8253#9462#17715
25K → 30K010366-10366#17715#28081
30K → 20M2720+272#28081#27809
20M → 21M2020+202#27809#27607
21M → 35K1250+125#27607#27482
35K → 23M2220+222#27482#27260
23M → 24M1610+161#27260#27099
24M → 40K860+86#27099#27013
40K → 25.2M700+70#27013#26943
25.2M → Finish1810+181#26943#26762
TOTALS137623399-22025
📊

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