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BOSTON MARATHON 2025

Kevin Chow

Bib: 13083•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 41%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Top 43%
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:45
Rank: #10572
Start → 5K
22:45 | 7:19/mi
10K· 6.21 mi
45:35
Rank: #10636 (-64)
5K → 10K
22:50 | 7:21/mi
15K· 9.32 mi
1:08:46
Rank: #10865 (-229)
10K → 15K
23:11 | 7:28/mi
20K· 12.43 mi
1:32:50
Rank: #11399 (-534)
15K → 20K
24:04 | 7:45/mi
Half· 13.11 mi
1:38:05
Rank: #11483 (-84)
20K → Half
5:15 | 7:42/mi
25K· 15.53 mi
1:57:26
Rank: #11842 (-359)
Half → 25K
19:21 | 7:59/mi
30K· 18.64 mi
2:23:04
Rank: #12033 (-191)
25K → 30K
25:38 | 8:15/mi
20M
2:33:54
Rank: #11858 (+175)
30K → 20M
10:50 | 7:58/mi
21M
2:42:35
Rank: #11828 (+30)
20M → 21M
8:41 | 8:41/mi
35K· 21.75 mi
2:48:28
Rank: #11795 (+33)
21M → 35K
5:53 | 7:52/mi
23M
2:58:47
Rank: #11746 (+49)
35K → 23M
10:19 | 8:14/mi
24M
3:06:52
Rank: #11738 (+8)
23M → 24M
8:05 | 8:05/mi
40K· 24.85 mi
3:13:49
Rank: #11667 (+71)
24M → 40K
6:57 | 8:08/mi
25.2M
3:16:59
Rank: #11686 (-19)
40K → 25.2M
3:10 | 9:11/mi
Finish· 26.22 mi
3:24:54
Rank: #11648 (+38)
25.2M → Finish
7:55 | 7:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:05
Pace7:29 /mi
2nd Half
Distance13.11 mi
Time1:46:49
Pace8:09 /mi
📊Positive Split: 8.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:52:0122:457:1922:45
7:19
-
10K
6.21 mi11:14:5145:357:2022:50
7:21
+0:02
15K
9.32 mi11:38:021:08:467:2323:11
7:28
+0:07
20K
12.43 mi12:02:061:32:507:2824:04
7:45
+0:17
Half
13.11 mi12:07:211:38:057:295:15
7:42
-0:03
25K
15.53 mi12:26:421:57:267:3419:21
7:59
+0:17
30K
18.64 mi12:52:202:23:047:4025:38
8:15
+0:16
20M
20.00 mi13:03:102:33:547:4210:50
7:58
-0:17
21M
21.00 mi13:11:512:42:357:458:41
8:41
+0:43
35K
21.75 mi13:17:442:48:287:455:53
7:52
-0:49
23M
23.00 mi13:28:032:58:477:4610:19
8:14
+0:22
24M
24.00 mi13:36:083:06:527:478:05
8:05
-0:09
40K
24.85 mi13:43:053:13:497:486:57
8:08
+0:03
25.2M
25.20 mi13:46:153:16:597:493:10
9:11
+1:03
Finish
26.22 mi13:54:103:24:547:497:55
7:46
-1:25

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

7:19 /mi

Average Pace

7:49 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:14:01

36% of race

Time at Steady Pace

1:23:05

41% of race

Time at Slower Pace

47:48

23% of race

Average Pace: 7:49 /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 mi10:52:0122:457:1922:45
7:19
#10572
10K
6.21 mi11:14:5145:357:2022:50
7:21
#10636
15K
9.32 mi11:38:021:08:467:2323:11
7:28
#10865
20K
12.43 mi12:02:061:32:507:2824:04
7:45
#11399
Half
13.11 mi12:07:211:38:057:295:15
7:42
#11483
25K
15.53 mi12:26:421:57:267:3419:21
7:59
#11842
30K
18.64 mi12:52:202:23:047:4025:38
8:15
#12033
20M
20.00 mi13:03:102:33:547:4210:50
7:58
#11858
21M
21.00 mi13:11:512:42:357:458:41
8:41
#11828
35K
21.75 mi13:17:442:48:287:455:53
7:52
#11795
23M
23.00 mi13:28:032:58:477:4610:19
8:14
#11746
24M
24.00 mi13:36:083:06:527:478:05
8:05
#11738
40K
24.85 mi13:43:053:13:497:486:57
8:08
#11667
25.2M
25.20 mi13:46:153:16:597:493:10
9:11
#11686
Finish
26.22 mi13:54:103:24:547:497:55
7:46
#11648
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi105728478847811424(Top 40%)8800(Top 55%)8800(Top 369%)
10K6.21 mi3.10 mi10636-648479-18479-110728(Top 38%)8525(Top 53%)8525(Top 357%)
15K9.32 mi3.11 mi10865-2298581-1028581-10211424(Top 40%)8800(Top 55%)8800(Top 369%)
20K12.43 mi3.11 mi11399-5348815-2348815-23412795(Top 45%)9321(Top 58%)9321(Top 391%)
Half13.11 mi0.68 mi11483-848851-368851-3613277(Top 47%)9577(Top 59%)9577(Top 401%)
25K15.53 mi2.42 mi11842-3598970-1198970-11913710(Top 48%)9603(Top 60%)9603(Top 402%)
30K18.64 mi3.11 mi12033-1918989-198989-1913161(Top 46%)9199(Top 57%)9199(Top 386%)
20M20.00 mi1.36 mi11858+1758874+1158874+11510249(Top 36%)7667(Top 48%)7667(Top 321%)
21M21.00 mi1.00 mi11828+308815+598815+5911555(Top 41%)8148(Top 51%)8148(Top 341%)
35K21.75 mi0.75 mi11795+338780+358780+3511264(Top 40%)7991(Top 50%)7991(Top 335%)
23M23.00 mi1.25 mi11746+498713+678713+6711619(Top 41%)8047(Top 50%)8047(Top 337%)
24M24.00 mi1.00 mi11738+88665+488665+4811772(Top 41%)8045(Top 50%)8045(Top 337%)
40K24.85 mi0.85 mi11667+718606+598606+5911067(Top 39%)7603(Top 47%)7603(Top 319%)
25.2M25.20 mi0.35 mi11686-198600+68600+612752(Top 45%)8337(Top 52%)8337(Top 349%)
Finish26.22 mi1.02 mi11648+388538+628538+6211193(Top 39%)7611(Top 47%)7611(Top 319%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11424

Males

8800

M45-49

8800

5K→10K

3.1 - 6.2 mi

Top 38%
×5stories
+79ft-138ft

Overall

10728

Males

8525

M45-49

8525

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11424

Males

8800

M45-49

8800

15K→20K

9.3 - 12.4 mi

Top 45%
×5stories
+106ft-86ft

Overall

12795

Males

9321

M45-49

9321

20K→Half

12.4 - 13.1 mi

Top 47%
×2stories
+19ft-37ft

Overall

13277

Males

9577

M45-49

9577

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13710

Males

9603

M45-49

9603

25K→30K

15.5 - 18.6 mi

Top 46%
×9stories
+181ft-148ft

Overall

13161

Males

9199

M45-49

9199

30K→20M

18.6 - 20.0 mi

Top 36%
×5stories
+64ft-50ft

Overall

10249

Males

7667

M45-49

7667

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

11555

Males

8148

M45-49

8148

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11264

Males

7991

M45-49

7991

35K→23M

21.8 - 23.0 mi

Top 41%
×5stories
+23ft-63ft

Overall

11619

Males

8047

M45-49

8047

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

11772

Males

8045

M45-49

8045

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11067

Males

7603

M45-49

7603

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12752

Males

8337

M45-49

8337

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2stories
+22ft-21ft

Overall

11193

Males

7611

M45-49

7611

Passing Analysis

Category:
Athletes Passed
1543
Passed By
2619
Net Change
-1076
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10572
5K → 10K236300-64#10572#10636
10K → 15K102331-229#10636#10865
15K → 20K64598-534#10865#11399
20K → Half17101-84#11399#11483
Half → 25K83442-359#11483#11842
25K → 30K179370-191#11842#12033
30K → 20M21237+175#12033#11858
20M → 21M11888+30#11858#11828
21M → 35K6734+33#11828#11795
35K → 23M13283+49#11795#11746
23M → 24M8476+8#11746#11738
24M → 40K11342+71#11738#11667
40K → 25.2M2746-19#11667#11686
25.2M → Finish10971+38#11686#11648
TOTALS15432619-1076
📊

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