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BOSTON MARATHON 2025

John Lok

Bib: 12616•M

BC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 48%
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M50-54)
#0 / 1996
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:16/mi
22:36
↑ 97↓ 3451.5%
10K· 6.21 mi
7:27/mi
45:45
↑ 79↓ 1380.4%
15K· 9.32 mi
7:33/mi
1:09:13
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:33:29
↑ 106↓ 860.1%
Half· 13.11 mi
7:48/mi
1:38:48
↑ 19↓ 370.5%
25K· 15.53 mi
8:02/mi
1:58:16
↑ 66↓ 880.2%
30K· 18.64 mi
8:31/mi
2:24:45
↑ 181↓ 1480.2%
20M
8:51/mi
2:36:46
↑ 64↓ 500.2%
21M
9:26/mi
2:46:12
↑ 106↓ 241.6%
35K· 21.75 mi
8:07/mi
2:52:16
↑ 17↓ 861.7%
23M
8:39/mi
3:03:06
↑ 23↓ 630.6%
24M
8:32/mi
3:11:38
↓ 821.3%
40K· 24.85 mi
8:51/mi
3:19:12
↓ 200.3%
25.2M
9:57/mi
3:22:38
↑ 13↓ 160.2%
Finish· 26.22 mi
8:35/mi
3:31:23
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:48
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:52:35
Pace8:35 /mi
📊Positive Split: 14.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:4922:367:1622:36
7:16
-
10K
6.21 mi11:13:5845:457:2223:09
7:27
+0:11
15K
9.32 mi11:37:261:09:137:2623:28
7:33
+0:06
20K
12.43 mi12:01:421:33:297:3124:16
7:49
+0:16
Half
13.11 mi12:07:011:38:487:325:19
7:48
-0:01
25K
15.53 mi12:26:291:58:167:3719:28
8:02
+0:14
30K
18.64 mi12:52:582:24:457:4626:29
8:31
+0:29
20M
20.00 mi13:04:592:36:467:5012:01
8:51
+0:20
21M
21.00 mi13:14:252:46:127:559:26
9:26
+0:35
35K
21.75 mi13:20:292:52:167:556:04
8:07
-1:19
23M
23.00 mi13:31:193:03:067:5810:50
8:39
+0:32
24M
24.00 mi13:39:513:11:387:598:32
8:32
-0:07
40K
24.85 mi13:47:253:19:128:017:34
8:51
+0:19
25.2M
25.20 mi13:50:513:22:388:023:26
9:57
+1:06
Finish
26.22 mi13:59:363:31:238:048:45
8:35
-1:22

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

7:16 /mi

Average Pace

8:04 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:04:20

59% of race

Time at Steady Pace

1:14:11

35% of race

Time at Slower Pace

12:52

6% of race

Average Pace: 8:04 /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 mi10:50:4922:367:1622:36
7:16
#10091
10K
6.21 mi11:13:5845:457:2223:09
7:27
#10892
15K
9.32 mi11:37:261:09:137:2623:28
7:33
#11308
20K
12.43 mi12:01:421:33:297:3124:16
7:49
#11829
Half
13.11 mi12:07:011:38:487:325:19
7:48
#11954
25K
15.53 mi12:26:291:58:167:3719:28
8:02
#12304
30K
18.64 mi12:52:582:24:457:4626:29
8:31
#12781
20M
20.00 mi13:04:592:36:467:5012:01
8:51
#13039
21M
21.00 mi13:14:252:46:127:559:26
9:26
#13197
35K
21.75 mi13:20:292:52:167:556:04
8:07
#13177
23M
23.00 mi13:31:193:03:067:5810:50
8:39
#13224
24M
24.00 mi13:39:513:11:387:598:32
8:32
#13281
40K
24.85 mi13:47:253:19:128:017:34
8:51
#13363
25.2M
25.20 mi13:50:513:22:388:023:26
9:57
#13426
Finish
26.22 mi13:59:363:31:238:048:45
8:35
#13591
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi100918225822512208(Top 43%)9153(Top 57%)9153(Top 459%)
10K6.21 mi3.10 mi10892-8018610-3858610-38511637(Top 41%)8974(Top 56%)8974(Top 450%)
15K9.32 mi3.11 mi11308-4168800-1908800-19012208(Top 43%)9153(Top 57%)9153(Top 459%)
20K12.43 mi3.11 mi11829-5219021-2219021-22113344(Top 47%)9574(Top 59%)9574(Top 480%)
Half13.11 mi0.68 mi11954-1259070-499070-4914152(Top 50%)9964(Top 62%)9964(Top 499%)
25K15.53 mi2.42 mi12304-3509194-1249194-12414105(Top 50%)9810(Top 61%)9810(Top 491%)
30K18.64 mi3.11 mi12781-4779341-1479341-14714896(Top 52%)10007(Top 62%)10007(Top 501%)
20M20.00 mi1.36 mi13039-2589399-589399-5815883(Top 56%)10317(Top 64%)10317(Top 517%)
21M21.00 mi1.00 mi13197-1589440-419440-4115759(Top 55%)10132(Top 63%)10132(Top 508%)
35K21.75 mi0.75 mi13177+209419+219419+2112965(Top 46%)8789(Top 55%)8789(Top 440%)
23M23.00 mi1.25 mi13224-479392+279392+2714237(Top 50%)9272(Top 58%)9272(Top 465%)
24M24.00 mi1.00 mi13281-579392939214705(Top 52%)9448(Top 59%)9448(Top 473%)
40K24.85 mi0.85 mi13363-829400-89400-815432(Top 54%)9619(Top 60%)9619(Top 482%)
25.2M25.20 mi0.35 mi13426-639417-179417-1716745(Top 59%)10228(Top 64%)10228(Top 512%)
Finish26.22 mi1.02 mi13591-1659461-449461-4416744(Top 59%)10271(Top 64%)10271(Top 515%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21story building
+97ft-345ft

Overall

12208

Males

9153

M50-54

9153

5K→10K

3.1 - 6.2 mi

Top 41%
×5story building
+79ft-138ft

Overall

11637

Males

8974

M50-54

8974

10K→15K

6.2 - 9.3 mi

Top 43%
×3story building
+67ft-78ft

Overall

12208

Males

9153

M50-54

9153

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13344

Males

9574

M50-54

9574

20K→Half

12.4 - 13.1 mi

Top 50%
×2story building
+19ft-37ft

Overall

14152

Males

9964

M50-54

9964

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14105

Males

9810

M50-54

9810

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

14896

Males

10007

M50-54

10007

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

15883

Males

10317

M50-54

10317

20M→21M

20.0 - 21.0 mi

Top 55%
×8story building
+106ft-24ft

Overall

15759

Males

10132

M50-54

10132

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

12965

Males

8789

M50-54

8789

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

14237

Males

9272

M50-54

9272

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

14705

Males

9448

M50-54

9448

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

15432

Males

9619

M50-54

9619

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

16745

Males

10228

M50-54

10228

25.2M→Finish

25.2 - 26.2 mi

Top 59%
×2story building
+22ft-21ft

Overall

16744

Males

10271

M50-54

10271

Passing Analysis

Category:
Athletes Passed
855
Passed By
4354
Net Change
-3500
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10091
5K → 10K53853-801#10091#10892
10K → 15K89505-416#10892#11308
15K → 20K64585-521#11308#11829
20K → Half12137-125#11829#11954
Half → 25K76426-350#11954#12304
25K → 30K118595-477#12304#12781
30K → 20M68326-258#12781#13039
20M → 21M53211-158#13039#13197
21M → 35K6343+20#13197#13177
35K → 23M93140-47#13177#13224
23M → 24M58115-57#13224#13281
24M → 40K52134-82#13281#13363
40K → 25.2M2588-63#13363#13426
25.2M → Finish31196-165#13426#13591
TOTALS8554354-3500
📊

Passing Visuals

Category:
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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