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BOSTON MARATHON 2025

Alvin Ma

Bib: 3540•M

CA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 10%
Gender (Male)
#0 / 16105
Top 17%
Division (M18-39)
#0 / 5642
Top 38%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:06
Rank: #3598
Start → 5K
20:06 | 6:28/mi
10K· 6.21 mi
40:08
Rank: #3464 (+134)
5K → 10K
20:02 | 6:27/mi
15K· 9.32 mi
1:00:08
Rank: #3330 (+134)
10K → 15K
20:00 | 6:26/mi
20K· 12.43 mi
1:20:04
Rank: #3120 (+210)
15K → 20K
19:56 | 6:25/mi
Half· 13.11 mi
1:24:23
Rank: #3093 (+27)
20K → Half
4:19 | 6:20/mi
25K· 15.53 mi
1:40:12
Rank: #3046 (+47)
Half → 25K
15:49 | 6:31/mi
30K· 18.64 mi
2:01:26
Rank: #3123 (-77)
25K → 30K
21:14 | 6:50/mi
20M
2:10:42
Rank: #3070 (+53)
30K → 20M
9:16 | 6:49/mi
21M
2:17:53
Rank: #3027 (+43)
20M → 21M
7:11 | 7:11/mi
35K· 21.75 mi
2:22:36
Rank: #2940 (+87)
21M → 35K
4:43 | 6:18/mi
23M
2:31:05
Rank: #2880 (+60)
35K → 23M
8:29 | 6:47/mi
24M
2:37:47
Rank: #2847 (+33)
23M → 24M
6:42 | 6:42/mi
40K· 24.85 mi
2:43:23
Rank: #2768 (+79)
24M → 40K
5:36 | 6:33/mi
25.2M
2:46:01
Rank: #2775 (-7)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
2:53:25
Rank: #2890 (-115)
25.2M → Finish
7:24 | 7:16/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:23
Pace6:26 /mi
2nd Half
Distance13.11 mi
Time1:29:02
Pace6:48 /mi
📊Positive Split: 5.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:2920:066:2820:06
6:28
-
10K
6.21 mi10:42:3140:086:2820:02
6:27
-0:01
15K
9.32 mi11:02:311:00:086:2720:00
6:26
-0:01
20K
12.43 mi11:22:271:20:046:2719:56
6:25
-0:01
Half
13.11 mi11:26:461:24:236:264:19
6:20
-0:05
25K
15.53 mi11:42:351:40:126:2715:49
6:31
+0:11
30K
18.64 mi12:03:492:01:266:3121:14
6:50
+0:19
20M
20.00 mi12:13:052:10:426:329:16
6:49
-0:01
21M
21.00 mi12:20:162:17:536:347:11
7:11
+0:22
35K
21.75 mi12:24:592:22:366:334:43
6:18
-0:53
23M
23.00 mi12:33:282:31:056:348:29
6:47
+0:29
24M
24.00 mi12:40:102:37:476:346:42
6:42
-0:05
40K
24.85 mi12:45:462:43:236:345:36
6:33
-0:09
25.2M
25.20 mi12:48:242:46:016:352:38
7:38
+1:05
Finish
26.22 mi12:55:482:53:256:377:24
7:16
-0:22

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

6:18 /mi

Average Pace

6:37 /mi

Slowest Pace

7:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

9:02

5% of race

Time at Steady Pace

1:48:11

62% of race

Time at Slower Pace

56:12

32% of race

Average Pace: 6:37 /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 mi10:22:2920:066:2820:06
6:28
#3598
10K
6.21 mi10:42:3140:086:2820:02
6:27
#3464
15K
9.32 mi11:02:311:00:086:2720:00
6:26
#3330
20K
12.43 mi11:22:271:20:046:2719:56
6:25
#3120
Half
13.11 mi11:26:461:24:236:264:19
6:20
#3093
25K
15.53 mi11:42:351:40:126:2715:49
6:31
#3046
30K
18.64 mi12:03:492:01:266:3121:14
6:50
#3123
20M
20.00 mi12:13:052:10:426:329:16
6:49
#3070
21M
21.00 mi12:20:162:17:536:347:11
7:11
#3027
35K
21.75 mi12:24:592:22:366:334:43
6:18
#2940
23M
23.00 mi12:33:282:31:056:348:29
6:47
#2880
24M
24.00 mi12:40:102:37:476:346:42
6:42
#2847
40K
24.85 mi12:45:462:43:236:345:36
6:33
#2768
25.2M
25.20 mi12:48:242:46:016:352:38
7:38
#2775
Finish
26.22 mi12:55:482:53:256:377:24
7:16
#2890
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3598341334133159(Top 11%)3005(Top 19%)3005(Top 53%)
10K6.21 mi3.10 mi3464+1343288+1253288+1253351(Top 12%)3182(Top 20%)3182(Top 56%)
15K9.32 mi3.11 mi3330+1343161+1273161+1273159(Top 11%)3005(Top 19%)3005(Top 53%)
20K12.43 mi3.11 mi3120+2102973+1882973+1882608(Top 9%)2485(Top 15%)2485(Top 44%)
Half13.11 mi0.68 mi3093+272948+252948+252636(Top 9%)2519(Top 16%)2519(Top 45%)
25K15.53 mi2.42 mi3046+472903+452903+453004(Top 11%)2854(Top 18%)2854(Top 51%)
30K18.64 mi3.11 mi3123-772970-672970-673642(Top 13%)3372(Top 21%)3372(Top 60%)
20M20.00 mi1.36 mi3070+532914+562914+563019(Top 11%)2809(Top 17%)2809(Top 50%)
21M21.00 mi1.00 mi3027+432868+462868+463044(Top 11%)2809(Top 17%)2809(Top 50%)
35K21.75 mi0.75 mi2940+872784+842784+841634(Top 6%)1534(Top 10%)1534(Top 27%)
23M23.00 mi1.25 mi2880+602729+552729+552573(Top 9%)2376(Top 15%)2376(Top 42%)
24M24.00 mi1.00 mi2847+332696+332696+332959(Top 10%)2683(Top 17%)2683(Top 48%)
40K24.85 mi0.85 mi2768+792623+732623+731798(Top 6%)1661(Top 10%)1661(Top 29%)
25.2M25.20 mi0.35 mi2775-72628-52628-53963(Top 14%)3379(Top 21%)3379(Top 60%)
Finish26.22 mi1.02 mi2890-1152732-1042732-1047432(Top 26%)5565(Top 35%)5565(Top 99%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 11%
×21stories
+97ft-345ft

Overall

3159

Males

3005

M18-39

3005

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3351

Males

3182

M18-39

3182

10K→15K

6.2 - 9.3 mi

Top 11%
×3stories
+67ft-78ft

Overall

3159

Males

3005

M18-39

3005

15K→20K

9.3 - 12.4 mi

Top 9%
×5stories
+106ft-86ft

Overall

2608

Males

2485

M18-39

2485

20K→Half

12.4 - 13.1 mi

Top 9%
×2stories
+19ft-37ft

Overall

2636

Males

2519

M18-39

2519

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

3004

Males

2854

M18-39

2854

25K→30K

15.5 - 18.6 mi

Top 13%
×9stories
+181ft-148ft

Overall

3642

Males

3372

M18-39

3372

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

3019

Males

2809

M18-39

2809

20M→21M

20.0 - 21.0 mi

Top 11%
×8stories
+106ft-24ft

Overall

3044

Males

2809

M18-39

2809

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1634

Males

1534

M18-39

1534

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2573

Males

2376

M18-39

2376

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2959

Males

2683

M18-39

2683

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1798

Males

1661

M18-39

1661

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

3963

Males

3379

M18-39

3379

25.2M→Finish

25.2 - 26.2 mi

Top 26%
×2stories
+22ft-21ft

Overall

7432

Males

5565

M18-39

5565

Passing Analysis

Category:
Athletes Passed
1296
Passed By
588
Net Change
+708
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3598
5K → 10K21783+134#3598#3464
10K → 15K17238+134#3464#3330
15K → 20K2199+210#3330#3120
20K → Half325+27#3120#3093
Half → 25K8033+47#3093#3046
25K → 30K86163-77#3046#3123
30K → 20M8633+53#3123#3070
20M → 21M6522+43#3070#3027
21M → 35K903+87#3027#2940
35K → 23M8323+60#2940#2880
23M → 24M5623+33#2880#2847
24M → 40K867+79#2847#2768
40K → 25.2M1724-7#2768#2775
25.2M → Finish7122-115#2775#2890
TOTALS1296588+708
📊

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