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BOSTON MARATHON 2025

Laurence Chau

Bib: 21299•M

ON

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M60-64)
#0 / 1259
Top 30%
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
7:59/mi
24:47
↑ 97↓ 3451.5%
10K· 6.21 mi
8:04/mi
49:52
↑ 79↓ 1380.4%
15K· 9.32 mi
8:02/mi
1:14:49
↑ 67↓ 78
20K· 12.43 mi
8:09/mi
1:40:08
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:45:37
↑ 19↓ 370.5%
25K· 15.53 mi
8:05/mi
2:05:13
↑ 66↓ 880.2%
30K· 18.64 mi
8:23/mi
2:31:17
↑ 181↓ 1480.2%
20M
9:05/mi
2:43:37
↑ 64↓ 500.2%
21M
9:14/mi
2:52:51
↑ 106↓ 241.6%
35K· 21.75 mi
8:15/mi
2:59:01
↑ 17↓ 861.7%
23M
8:44/mi
3:09:57
↑ 23↓ 630.6%
24M
9:09/mi
3:19:06
↓ 821.3%
40K· 24.85 mi
8:58/mi
3:26:46
↓ 200.3%
25.2M
10:26/mi
3:30:22
↑ 13↓ 160.2%
Finish· 26.22 mi
9:02/mi
3:39:34
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:37
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time1:53:57
Pace8:42 /mi
📊Positive Split: 7.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3924:477:5924:47
7:59
-
10K
6.21 mi11:42:4449:528:0225:05
8:04
+0:05
15K
9.32 mi12:07:411:14:498:0224:57
8:02
-0:02
20K
12.43 mi12:33:001:40:088:0325:19
8:09
+0:07
Half
13.11 mi12:38:291:45:378:035:29
8:02
-0:07
25K
15.53 mi12:58:052:05:138:0419:36
8:05
+0:03
30K
18.64 mi13:24:092:31:178:0726:04
8:23
+0:18
20M
20.00 mi13:36:292:43:378:1112:20
9:05
+0:42
21M
21.00 mi13:45:432:52:518:149:14
9:14
+0:09
35K
21.75 mi13:51:532:59:018:146:10
8:15
-0:59
23M
23.00 mi14:02:493:09:578:1610:56
8:44
+0:29
24M
24.00 mi14:11:583:19:068:189:09
9:09
+0:25
40K
24.85 mi14:19:383:26:468:197:40
8:58
-0:11
25.2M
25.20 mi14:23:143:30:228:213:36
10:26
+1:28
Finish
26.22 mi14:32:263:39:348:239:12
9:02
-1:24

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

7:59 /mi

Average Pace

8:23 /mi

Slowest Pace

10:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

55:13

25% of race

Time at Steady Pace

1:42:14

47% of race

Time at Slower Pace

1:02:07

28% of race

Average Pace: 8:22 /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 mi11:17:3924:477:5924:47
7:59
#16393
10K
6.21 mi11:42:4449:528:0225:05
8:04
#16712
15K
9.32 mi12:07:411:14:498:0224:57
8:02
#16527
20K
12.43 mi12:33:001:40:088:0325:19
8:09
#16358
Half
13.11 mi12:38:291:45:378:035:29
8:02
#16351
25K
15.53 mi12:58:052:05:138:0419:36
8:05
#16026
30K
18.64 mi13:24:092:31:178:0726:04
8:23
#15626
20M
20.00 mi13:36:292:43:378:1112:20
9:05
#15707
21M
21.00 mi13:45:432:52:518:149:14
9:14
#15619
35K
21.75 mi13:51:532:59:018:146:10
8:15
#15542
23M
23.00 mi14:02:493:09:578:1610:56
8:44
#15449
24M
24.00 mi14:11:583:19:068:189:09
9:09
#15560
40K
24.85 mi14:19:383:26:468:197:40
8:58
#15547
25.2M
25.20 mi14:23:143:30:228:213:36
10:26
#15604
Finish
26.22 mi14:32:263:39:348:239:12
9:02
#15761
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi16393109591095916270(Top 57%)10927(Top 68%)10927(Top 868%)
10K6.21 mi3.10 mi16712-31911101-14211101-14216999(Top 60%)11243(Top 70%)11243(Top 893%)
15K9.32 mi3.11 mi16527+18511034+6711034+6716270(Top 57%)10927(Top 68%)10927(Top 868%)
20K12.43 mi3.11 mi16358+16910953+8110953+8115967(Top 56%)10729(Top 67%)10729(Top 852%)
Half13.11 mi0.68 mi16351+710948+510948+516144(Top 57%)10817(Top 67%)10817(Top 859%)
25K15.53 mi2.42 mi16026+32510800+14810800+14814519(Top 51%)9987(Top 62%)9987(Top 793%)
30K18.64 mi3.11 mi15626+40010572+22810572+22814071(Top 50%)9622(Top 60%)9622(Top 764%)
20M20.00 mi1.36 mi15707-8110563+910563+917184(Top 60%)10892(Top 68%)10892(Top 865%)
21M21.00 mi1.00 mi15619+8810489+7410489+7414785(Top 52%)9699(Top 60%)9699(Top 770%)
35K21.75 mi0.75 mi15542+7710441+4810441+4813888(Top 49%)9239(Top 57%)9239(Top 734%)
23M23.00 mi1.25 mi15449+9310361+8010361+8014719(Top 52%)9497(Top 59%)9497(Top 754%)
24M24.00 mi1.00 mi15560-11110394-3310394-3318090(Top 64%)10958(Top 68%)10958(Top 870%)
40K24.85 mi0.85 mi15547+1310353+4110353+4116087(Top 57%)9960(Top 62%)9960(Top 791%)
25.2M25.20 mi0.35 mi15604-5710370-1710370-1718733(Top 66%)11177(Top 69%)11177(Top 888%)
Finish26.22 mi1.02 mi15761-15710412-4210412-4219174(Top 68%)11413(Top 71%)11413(Top 907%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

16270

Males

10927

M60-64

10927

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

16999

Males

11243

M60-64

11243

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

16270

Males

10927

M60-64

10927

15K→20K

9.3 - 12.4 mi

Top 56%
×5story building
+106ft-86ft

Overall

15967

Males

10729

M60-64

10729

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

16144

Males

10817

M60-64

10817

Half→25K

13.1 - 15.5 mi

Top 51%
×4story building
+66ft-88ft

Overall

14519

Males

9987

M60-64

9987

25K→30K

15.5 - 18.6 mi

Top 50%
×9story building
+181ft-148ft

Overall

14071

Males

9622

M60-64

9622

30K→20M

18.6 - 20.0 mi

Top 60%
×5story building
+64ft-50ft

Overall

17184

Males

10892

M60-64

10892

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

14785

Males

9699

M60-64

9699

21M→35K

21.0 - 21.8 mi

Top 49%
×7story building
+17ft-86ft

Overall

13888

Males

9239

M60-64

9239

35K→23M

21.8 - 23.0 mi

Top 52%
×5story building
+23ft-63ft

Overall

14719

Males

9497

M60-64

9497

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

18090

Males

10958

M60-64

10958

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16087

Males

9960

M60-64

9960

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

18733

Males

11177

M60-64

11177

25.2M→Finish

25.2 - 26.2 mi

Top 68%
×2story building
+22ft-21ft

Overall

19174

Males

11413

M60-64

11413

Passing Analysis

Category:
Athletes Passed
2276
Passed By
1644
Net Change
+632
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16393
5K → 10K179498-319#16393#16712
10K → 15K300115+185#16712#16527
15K → 20K294125+169#16527#16358
20K → Half4639+7#16358#16351
Half → 25K34217+325#16351#16026
25K → 30K46262+400#16026#15626
30K → 20M99180-81#15626#15707
20M → 21M15769+88#15707#15619
21M → 35K9821+77#15619#15542
35K → 23M15259+93#15542#15449
23M → 24M32143-111#15449#15560
24M → 40K7461+13#15560#15547
40K → 25.2M1370-57#15547#15604
25.2M → Finish28185-157#15604#15761
TOTALS22761644+632
📊

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