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BOSTON MARATHON 2025

Brian Kao

Bib: 4695•M

TX

0:00
0:00
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Overall
#0 / 28404
Top 15%
Gender (Male)
#0 / 16105
Top 25%
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
20:05
Rank: #3581
Start → 5K
20:05 | 6:28/mi
10K· 6.21 mi
40:35
Rank: #3998 (-417)
5K → 10K
20:30 | 6:36/mi
15K· 9.32 mi
1:01:02
Rank: #4024 (-26)
10K → 15K
20:27 | 6:35/mi
20K· 12.43 mi
1:21:38
Rank: #3933 (+91)
15K → 20K
20:36 | 6:38/mi
Half· 13.11 mi
1:26:04
Rank: #3917 (+16)
20K → Half
4:26 | 6:30/mi
25K· 15.53 mi
1:42:09
Rank: #3847 (+70)
Half → 25K
16:05 | 6:38/mi
30K· 18.64 mi
2:03:25
Rank: #3767 (+80)
25K → 30K
21:16 | 6:51/mi
20M
2:13:01
Rank: #3778 (-11)
30K → 20M
9:36 | 7:04/mi
21M
2:20:21
Rank: #3747 (+31)
20M → 21M
7:20 | 7:20/mi
35K· 21.75 mi
2:25:31
Rank: #3772 (-25)
21M → 35K
5:10 | 6:54/mi
23M
2:34:32
Rank: #3804 (-32)
35K → 23M
9:01 | 7:12/mi
24M
2:41:38
Rank: #3846 (-42)
23M → 24M
7:06 | 7:06/mi
40K· 24.85 mi
2:48:00
Rank: #3926 (-80)
24M → 40K
6:22 | 7:27/mi
25.2M
2:51:01
Rank: #4024 (-98)
40K → 25.2M
3:01 | 8:45/mi
Finish· 26.22 mi
2:58:53
Rank: #4309 (-285)
25.2M → Finish
7:52 | 7:43/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:26:04
Pace6:34 /mi
2nd Half
Distance13.11 mi
Time1:32:49
Pace7:05 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:3120:056:2820:05
6:28
-
10K
6.21 mi10:44:0140:356:3220:30
6:36
+0:08
15K
9.32 mi11:04:281:01:026:3320:27
6:35
-0:01
20K
12.43 mi11:25:041:21:386:3420:36
6:38
+0:03
Half
13.11 mi11:29:301:26:046:344:26
6:30
-0:08
25K
15.53 mi11:45:351:42:096:3516:05
6:38
+0:08
30K
18.64 mi12:06:512:03:256:3721:16
6:51
+0:13
20M
20.00 mi12:16:272:13:016:399:36
7:04
+0:13
21M
21.00 mi12:23:472:20:216:417:20
7:20
+0:16
35K
21.75 mi12:28:572:25:316:415:10
6:54
-0:26
23M
23.00 mi12:37:582:34:326:439:01
7:12
+0:18
24M
24.00 mi12:45:042:41:386:447:06
7:06
-0:06
40K
24.85 mi12:51:262:48:006:466:22
7:27
+0:21
25.2M
25.20 mi12:54:272:51:016:473:01
8:45
+1:18
Finish
26.22 mi13:02:192:58:536:507:52
7:43
-1:02

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

6:50 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:05:28

37% of race

Time at Steady Pace

1:19:49

45% of race

Time at Slower Pace

33:36

19% 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 mi10:23:3120:056:2820:05
6:28
#3581
10K
6.21 mi10:44:0140:356:3220:30
6:36
#3998
15K
9.32 mi11:04:281:01:026:3320:27
6:35
#4024
20K
12.43 mi11:25:041:21:386:3420:36
6:38
#3933
Half
13.11 mi11:29:301:26:046:344:26
6:30
#3917
25K
15.53 mi11:45:351:42:096:3516:05
6:38
#3847
30K
18.64 mi12:06:512:03:256:3721:16
6:51
#3767
20M
20.00 mi12:16:272:13:016:399:36
7:04
#3778
21M
21.00 mi12:23:472:20:216:417:20
7:20
#3747
35K
21.75 mi12:28:572:25:316:415:10
6:54
#3772
23M
23.00 mi12:37:582:34:326:439:01
7:12
#3804
24M
24.00 mi12:45:042:41:386:447:06
7:06
#3846
40K
24.85 mi12:51:262:48:006:466:22
7:27
#3926
25.2M
25.20 mi12:54:272:51:016:473:01
8:45
#4024
Finish
26.22 mi13:02:192:58:536:507:52
7:43
#4309
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3581340234024094(Top 14%)3853(Top 24%)3853(Top 68%)
10K6.21 mi3.10 mi3998-4173779-3773779-3774469(Top 16%)4188(Top 26%)4188(Top 74%)
15K9.32 mi3.11 mi4024-263794-153794-154094(Top 14%)3853(Top 24%)3853(Top 68%)
20K12.43 mi3.11 mi3933+913704+903704+903906(Top 14%)3680(Top 23%)3680(Top 65%)
Half13.11 mi0.68 mi3917+163688+163688+163710(Top 13%)3510(Top 22%)3510(Top 62%)
25K15.53 mi2.42 mi3847+703624+643624+643688(Top 13%)3467(Top 22%)3467(Top 61%)
30K18.64 mi3.11 mi3767+803551+733551+733721(Top 13%)3443(Top 21%)3443(Top 61%)
20M20.00 mi1.36 mi3778-113557-63557-64481(Top 16%)4079(Top 25%)4079(Top 72%)
21M21.00 mi1.00 mi3747+313523+343523+343791(Top 13%)3454(Top 21%)3454(Top 61%)
35K21.75 mi0.75 mi3772-253545-223545-224775(Top 17%)4218(Top 26%)4218(Top 75%)
23M23.00 mi1.25 mi3804-323559-143559-144880(Top 17%)4231(Top 26%)4231(Top 75%)
24M24.00 mi1.00 mi3846-423589-303589-305215(Top 18%)4405(Top 27%)4405(Top 78%)
40K24.85 mi0.85 mi3926-803646-573646-576462(Top 23%)5118(Top 32%)5118(Top 91%)
25.2M25.20 mi0.35 mi4024-983725-793725-7910194(Top 36%)7018(Top 44%)7018(Top 124%)
Finish26.22 mi1.02 mi4309-2853964-2393964-23910799(Top 38%)7391(Top 46%)7391(Top 131%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

4094

Males

3853

M18-39

3853

5K→10K

3.1 - 6.2 mi

Top 16%
×5stories
+79ft-138ft

Overall

4469

Males

4188

M18-39

4188

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

4094

Males

3853

M18-39

3853

15K→20K

9.3 - 12.4 mi

Top 14%
×5stories
+106ft-86ft

Overall

3906

Males

3680

M18-39

3680

20K→Half

12.4 - 13.1 mi

Top 13%
×2stories
+19ft-37ft

Overall

3710

Males

3510

M18-39

3510

Half→25K

13.1 - 15.5 mi

Top 13%
×4stories
+66ft-88ft

Overall

3688

Males

3467

M18-39

3467

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3721

Males

3443

M18-39

3443

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4481

Males

4079

M18-39

4079

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3791

Males

3454

M18-39

3454

21M→35K

21.0 - 21.8 mi

Top 17%
×7stories
+17ft-86ft

Overall

4775

Males

4218

M18-39

4218

35K→23M

21.8 - 23.0 mi

Top 17%
×5stories
+23ft-63ft

Overall

4880

Males

4231

M18-39

4231

23M→24M

23.0 - 24.0 mi

Top 18%
×6stories
+12ft-82ft

Overall

5215

Males

4405

M18-39

4405

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6462

Males

5118

M18-39

5118

40K→25.2M

24.9 - 25.2 mi

Top 36%
×1story
+13ft-16ft

Overall

10194

Males

7018

M18-39

7018

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2stories
+22ft-21ft

Overall

10799

Males

7391

M18-39

7391

Passing Analysis

Category:
Athletes Passed
805
Passed By
1533
Net Change
-728
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3581
5K → 10K24441-417#3581#3998
10K → 15K78104-26#3998#4024
15K → 20K13948+91#4024#3933
20K → Half259+16#3933#3917
Half → 25K11242+70#3917#3847
25K → 30K14363+80#3847#3767
30K → 20M5869-11#3767#3778
20M → 21M7140+31#3778#3747
21M → 35K2146-25#3747#3772
35K → 23M6193-32#3772#3804
23M → 24M3880-42#3804#3846
24M → 40K27107-80#3846#3926
40K → 25.2M3101-98#3926#4024
25.2M → Finish5290-285#4024#4309
TOTALS8051533-728
📊

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