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BOSTON MARATHON 2025

Guobin Ou

Bib: 5566•M

CT

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 15%
Gender (Male)
#0 / 16105
Top 24%
Masters (Masters Men)
#0 / 10463
Top 11%
Division (M45-49)
#0 / 2386
Top 13%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:02
Rank: #6077
Start → 5K
21:02 | 6:46/mi
10K· 6.21 mi
41:46
Rank: #5570 (+507)
5K → 10K
20:44 | 6:40/mi
15K· 9.32 mi
1:02:42
Rank: #5512 (+58)
10K → 15K
20:56 | 6:44/mi
20K· 12.43 mi
1:23:53
Rank: #5477 (+35)
15K → 20K
21:11 | 6:49/mi
Half· 13.11 mi
1:28:29
Rank: #5477
20K → Half
4:36 | 6:45/mi
25K· 15.53 mi
1:45:04
Rank: #5390 (+87)
Half → 25K
16:35 | 6:50/mi
30K· 18.64 mi
2:06:43
Rank: #5127 (+263)
25K → 30K
21:39 | 6:58/mi
20M
2:16:12
Rank: #5005 (+122)
30K → 20M
9:29 | 6:59/mi
21M
2:23:34
Rank: #4908 (+97)
20M → 21M
7:22 | 7:22/mi
35K· 21.75 mi
2:28:36
Rank: #4834 (+74)
21M → 35K
5:02 | 6:44/mi
23M
2:37:03
Rank: #4614 (+220)
35K → 23M
8:27 | 6:45/mi
24M
2:43:41
Rank: #4469 (+145)
23M → 24M
6:38 | 6:38/mi
40K· 24.85 mi
2:49:25
Rank: #4349 (+120)
24M → 40K
5:44 | 6:42/mi
25.2M
2:52:00
Rank: #4315 (+34)
40K → 25.2M
2:35 | 7:29/mi
Finish· 26.22 mi
2:58:38
Rank: #4224 (+91)
25.2M → Finish
6:38 | 6:31/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:29
Pace6:45 /mi
2nd Half
Distance13.11 mi
Time1:30:09
Pace6:53 /mi
📊Positive Split: 1.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:4921:026:4621:02
6:46
-
10K
6.21 mi10:45:3341:466:4320:44
6:40
-0:06
15K
9.32 mi11:06:291:02:426:4420:56
6:44
+0:04
20K
12.43 mi11:27:401:23:536:4521:11
6:49
+0:05
Half
13.11 mi11:32:161:28:296:454:36
6:45
-0:04
25K
15.53 mi11:48:511:45:046:4616:35
6:50
+0:05
30K
18.64 mi12:10:302:06:436:4821:39
6:58
+0:08
20M
20.00 mi12:19:592:16:126:499:29
6:59
+0:01
21M
21.00 mi12:27:212:23:346:507:22
7:22
+0:23
35K
21.75 mi12:32:232:28:366:505:02
6:44
-0:38
23M
23.00 mi12:40:502:37:036:508:27
6:45
+0:01
24M
24.00 mi12:47:282:43:416:496:38
6:38
-0:07
40K
24.85 mi12:53:122:49:256:495:44
6:42
+0:04
25.2M
25.20 mi12:55:472:52:006:502:35
7:29
+0:47
Finish
26.22 mi13:02:252:58:386:496:38
6:31
-0:58

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

6:31 /mi

Average Pace

6:49 /mi

Slowest Pace

7:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:41

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 mi10:24:4921:026:4621:02
6:46
#6077
10K
6.21 mi10:45:3341:466:4320:44
6:40
#5570
15K
9.32 mi11:06:291:02:426:4420:56
6:44
#5512
20K
12.43 mi11:27:401:23:536:4521:11
6:49
#5477
Half
13.11 mi11:32:161:28:296:454:36
6:45
#5477
25K
15.53 mi11:48:511:45:046:4616:35
6:50
#5390
30K
18.64 mi12:10:302:06:436:4821:39
6:58
#5127
20M
20.00 mi12:19:592:16:126:499:29
6:59
#5005
21M
21.00 mi12:27:212:23:346:507:22
7:22
#4908
35K
21.75 mi12:32:232:28:366:505:02
6:44
#4834
23M
23.00 mi12:40:502:37:036:508:27
6:45
#4614
24M
24.00 mi12:47:282:43:416:496:38
6:38
#4469
40K
24.85 mi12:53:122:49:256:495:44
6:42
#4349
25.2M
25.20 mi12:55:472:52:006:502:35
7:29
#4315
Finish
26.22 mi13:02:252:58:386:496:38
6:31
#4224
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi6077557655765424(Top 19%)4983(Top 31%)4983(Top 209%)
10K6.21 mi3.10 mi5570+5075148+4285148+4285082(Top 18%)4734(Top 29%)4734(Top 198%)
15K9.32 mi3.11 mi5512+585093+555093+555424(Top 19%)4983(Top 31%)4983(Top 209%)
20K12.43 mi3.11 mi5477+355051+425051+425459(Top 19%)4986(Top 31%)4986(Top 209%)
Half13.11 mi0.68 mi54775050+15050+15554(Top 20%)5074(Top 32%)5074(Top 213%)
25K15.53 mi2.42 mi5390+874962+884962+885171(Top 18%)4737(Top 29%)4737(Top 199%)
30K18.64 mi3.11 mi5127+2634719+2434719+2434497(Top 16%)4109(Top 26%)4109(Top 172%)
20M20.00 mi1.36 mi5005+1224611+1084611+1083972(Top 14%)3640(Top 23%)3640(Top 153%)
21M21.00 mi1.00 mi4908+974523+884523+883936(Top 14%)3571(Top 22%)3571(Top 150%)
35K21.75 mi0.75 mi4834+744457+664457+663667(Top 13%)3314(Top 21%)3314(Top 139%)
23M23.00 mi1.25 mi4614+2204253+2044253+2042466(Top 9%)2285(Top 14%)2285(Top 96%)
24M24.00 mi1.00 mi4469+1454121+1324121+1322642(Top 9%)2425(Top 15%)2425(Top 102%)
40K24.85 mi0.85 mi4349+1204009+1124009+1122391(Top 8%)2188(Top 14%)2188(Top 92%)
25.2M25.20 mi0.35 mi4315+343976+333976+333327(Top 12%)2917(Top 18%)2917(Top 122%)
Finish26.22 mi1.02 mi4224+913890+863890+862864(Top 10%)2559(Top 16%)2559(Top 107%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 19%
×21stories
+97ft-345ft

Overall

5424

Males

4983

M45-49

4983

5K→10K

3.1 - 6.2 mi

Top 18%
×5stories
+79ft-138ft

Overall

5082

Males

4734

M45-49

4734

10K→15K

6.2 - 9.3 mi

Top 19%
×3stories
+67ft-78ft

Overall

5424

Males

4983

M45-49

4983

15K→20K

9.3 - 12.4 mi

Top 19%
×5stories
+106ft-86ft

Overall

5459

Males

4986

M45-49

4986

20K→Half

12.4 - 13.1 mi

Top 20%
×2stories
+19ft-37ft

Overall

5554

Males

5074

M45-49

5074

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

5171

Males

4737

M45-49

4737

25K→30K

15.5 - 18.6 mi

Top 16%
×9stories
+181ft-148ft

Overall

4497

Males

4109

M45-49

4109

30K→20M

18.6 - 20.0 mi

Top 14%
×5stories
+64ft-50ft

Overall

3972

Males

3640

M45-49

3640

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

3936

Males

3571

M45-49

3571

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3667

Males

3314

M45-49

3314

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2466

Males

2285

M45-49

2285

23M→24M

23.0 - 24.0 mi

Top 9%
×6stories
+12ft-82ft

Overall

2642

Males

2425

M45-49

2425

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2391

Males

2188

M45-49

2188

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3327

Males

2917

M45-49

2917

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2stories
+22ft-21ft

Overall

2864

Males

2559

M45-49

2559

Passing Analysis

Category:
Athletes Passed
2296
Passed By
443
Net Change
+1853
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6077
5K → 10K53730+507#6077#5570
10K → 15K14991+58#5570#5512
15K → 20K138103+35#5512#5477
20K → Half30300#5477#5477
Half → 25K14962+87#5477#5390
25K → 30K30643+263#5390#5127
30K → 20M13917+122#5127#5005
20M → 21M11922+97#5005#4908
21M → 35K8814+74#4908#4834
35K → 23M2244+220#4834#4614
23M → 24M1516+145#4614#4469
24M → 40K1222+120#4469#4349
40K → 25.2M406+34#4349#4315
25.2M → Finish10413+91#4315#4224
TOTALS2296443+1853
📊

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