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BOSTON MARATHON 2025

Winston Lo

Bib: 31490•M

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
30:23
Rank: #25039
Start → 5K
30:23 | 9:47/mi
10K· 6.21 mi
1:01:01
Rank: #25016 (+23)
5K → 10K
30:38 | 9:52/mi
15K· 9.32 mi
1:31:55
Rank: #24963 (+53)
10K → 15K
30:54 | 9:57/mi
20K· 12.43 mi
2:03:50
Rank: #24919 (+44)
15K → 20K
31:55 | 10:16/mi
Half· 13.11 mi
2:10:33
Rank: #24895 (+24)
20K → Half
6:43 | 9:51/mi
25K· 15.53 mi
2:34:51
Rank: #24642 (+253)
Half → 25K
24:18 | 10:01/mi
30K· 18.64 mi
3:09:24
Rank: #24574 (+68)
25K → 30K
34:33 | 11:07/mi
20M
3:24:19
Rank: #24523 (+51)
30K → 20M
14:55 | 10:59/mi
21M
3:36:16
Rank: #24458 (+65)
20M → 21M
11:57 | 11:57/mi
35K· 21.75 mi
3:44:12
Rank: #24426 (+32)
21M → 35K
7:56 | 10:36/mi
23M
3:57:44
Rank: #24332 (+94)
35K → 23M
13:32 | 10:49/mi
24M
4:08:56
Rank: #24335 (-3)
23M → 24M
11:12 | 11:12/mi
40K· 24.85 mi
4:18:01
Rank: #24272 (+63)
24M → 40K
9:05 | 10:37/mi
25.2M
4:21:59
Rank: #24252 (+20)
40K → 25.2M
3:58 | 11:30/mi
Finish· 26.22 mi
4:32:00
Rank: #24191 (+61)
25.2M → Finish
10:01 | 9:50/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:10:33
Pace9:57 /mi
2nd Half
Distance13.11 mi
Time2:21:27
Pace10:47 /mi
📊Positive Split: 8.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:3830:239:4730:23
9:47
-
10K
6.21 mi12:27:161:01:019:4930:38
9:52
+0:05
15K
9.32 mi12:58:101:31:559:5230:54
9:57
+0:05
20K
12.43 mi13:30:052:03:509:5831:55
10:16
+0:19
Half
13.11 mi13:36:482:10:339:576:43
9:51
-0:25
25K
15.53 mi14:01:062:34:519:5824:18
10:01
+0:10
30K
18.64 mi14:35:393:09:2410:1034:33
11:07
+1:06
20M
20.00 mi14:50:343:24:1910:1314:55
10:59
-0:08
21M
21.00 mi15:02:313:36:1610:1811:57
11:57
+0:58
35K
21.75 mi15:10:273:44:1210:197:56
10:36
-1:21
23M
23.00 mi15:23:593:57:4410:2013:32
10:49
+0:13
24M
24.00 mi15:35:114:08:5610:2211:12
11:12
+0:23
40K
24.85 mi15:44:164:18:0110:239:05
10:37
-0:35
25.2M
25.20 mi15:48:144:21:5910:243:58
11:30
+0:53
Finish
26.22 mi15:58:154:32:0010:2310:01
9:50
-1:40

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

9:47 /mi

Average Pace

10:23 /mi

Slowest Pace

11:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:44:52

61% of race

Time at Steady Pace

30:33

11% of race

Time at Slower Pace

1:16:35

28% of race

Average Pace: 10:22 /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 mi11:56:3830:239:4730:23
9:47
#25039
10K
6.21 mi12:27:161:01:019:4930:38
9:52
#25016
15K
9.32 mi12:58:101:31:559:5230:54
9:57
#24963
20K
12.43 mi13:30:052:03:509:5831:55
10:16
#24919
Half
13.11 mi13:36:482:10:339:576:43
9:51
#24895
25K
15.53 mi14:01:062:34:519:5824:18
10:01
#24642
30K
18.64 mi14:35:393:09:2410:1034:33
11:07
#24574
20M
20.00 mi14:50:343:24:1910:1314:55
10:59
#24523
21M
21.00 mi15:02:313:36:1610:1811:57
11:57
#24458
35K
21.75 mi15:10:273:44:1210:197:56
10:36
#24426
23M
23.00 mi15:23:593:57:4410:2013:32
10:49
#24332
24M
24.00 mi15:35:114:08:5610:2211:12
11:12
#24335
40K
24.85 mi15:44:164:18:0110:239:05
10:37
#24272
25.2M
25.20 mi15:48:144:21:5910:243:58
11:30
#24252
Finish
26.22 mi15:58:154:32:0010:2310:01
9:50
#24191
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25039147471474724891(Top 88%)14664(Top 91%)14664(Top 260%)
10K6.21 mi3.10 mi25016+2314716+3114716+3124998(Top 88%)14697(Top 91%)14697(Top 260%)
15K9.32 mi3.11 mi24963+5314699+1714699+1724891(Top 88%)14664(Top 91%)14664(Top 260%)
20K12.43 mi3.11 mi24919+4414664+3514664+3524780(Top 87%)14573(Top 90%)14573(Top 258%)
Half13.11 mi0.68 mi24895+2414649+1514649+1524473(Top 86%)14424(Top 90%)14424(Top 256%)
25K15.53 mi2.42 mi24642+25314525+12414525+12423314(Top 82%)13883(Top 86%)13883(Top 246%)
30K18.64 mi3.11 mi24574+6814465+6014465+6024240(Top 85%)14186(Top 88%)14186(Top 251%)
20M20.00 mi1.36 mi24523+5114434+3114434+3123534(Top 83%)13771(Top 86%)13771(Top 244%)
21M21.00 mi1.00 mi24458+6514387+4714387+4723505(Top 83%)13685(Top 85%)13685(Top 243%)
35K21.75 mi0.75 mi24426+3214356+3114356+3123387(Top 82%)13587(Top 84%)13587(Top 241%)
23M23.00 mi1.25 mi24332+9414304+5214304+5222764(Top 80%)13230(Top 82%)13230(Top 234%)
24M24.00 mi1.00 mi24335-314293+1114293+1124386(Top 86%)14010(Top 87%)14010(Top 248%)
40K24.85 mi0.85 mi24272+6314250+4314250+4322252(Top 78%)12862(Top 80%)12862(Top 228%)
25.2M25.20 mi0.35 mi24252+2014233+1714233+1722045(Top 78%)12820(Top 80%)12820(Top 227%)
Finish26.22 mi1.02 mi24191+6114194+3914194+3922384(Top 79%)12967(Top 81%)12967(Top 230%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21stories
+97ft-345ft

Overall

24891

Males

14664

M18-39

14664

5K→10K

3.1 - 6.2 mi

Top 88%
×5stories
+79ft-138ft

Overall

24998

Males

14697

M18-39

14697

10K→15K

6.2 - 9.3 mi

Top 88%
×3stories
+67ft-78ft

Overall

24891

Males

14664

M18-39

14664

15K→20K

9.3 - 12.4 mi

Top 87%
×5stories
+106ft-86ft

Overall

24780

Males

14573

M18-39

14573

20K→Half

12.4 - 13.1 mi

Top 86%
×2stories
+19ft-37ft

Overall

24473

Males

14424

M18-39

14424

Half→25K

13.1 - 15.5 mi

Top 82%
×4stories
+66ft-88ft

Overall

23314

Males

13883

M18-39

13883

25K→30K

15.5 - 18.6 mi

Top 85%
×9stories
+181ft-148ft

Overall

24240

Males

14186

M18-39

14186

30K→20M

18.6 - 20.0 mi

Top 83%
×5stories
+64ft-50ft

Overall

23534

Males

13771

M18-39

13771

20M→21M

20.0 - 21.0 mi

Top 83%
×8stories
+106ft-24ft

Overall

23505

Males

13685

M18-39

13685

21M→35K

21.0 - 21.8 mi

Top 82%
×7stories
+17ft-86ft

Overall

23387

Males

13587

M18-39

13587

35K→23M

21.8 - 23.0 mi

Top 80%
×5stories
+23ft-63ft

Overall

22764

Males

13230

M18-39

13230

23M→24M

23.0 - 24.0 mi

Top 86%
×6stories
+12ft-82ft

Overall

24386

Males

14010

M18-39

14010

24M→40K

24.0 - 24.9 mi

Top 78%
×1story
+6ft-20ft

Overall

22252

Males

12862

M18-39

12862

40K→25.2M

24.9 - 25.2 mi

Top 78%
×1story
+13ft-16ft

Overall

22045

Males

12820

M18-39

12820

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2stories
+22ft-21ft

Overall

22384

Males

12967

M18-39

12967

Passing Analysis

Category:
Athletes Passed
1527
Passed By
679
Net Change
+848
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25039
5K → 10K195172+23#25039#25016
10K → 15K154101+53#25016#24963
15K → 20K165121+44#24963#24919
20K → Half4117+24#24919#24895
Half → 25K26310+253#24895#24642
25K → 30K171103+68#24642#24574
30K → 20M7625+51#24574#24523
20M → 21M9025+65#24523#24458
21M → 35K4715+32#24458#24426
35K → 23M11016+94#24426#24332
23M → 24M4750-3#24332#24335
24M → 40K7512+63#24335#24272
40K → 25.2M244+20#24272#24252
25.2M → Finish698+61#24252#24191
TOTALS1527679+848
📊

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