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BOSTON MARATHON 2025

Ernest Au

Bib: 5433•M

NY

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 36%
Gender (Male)
#0 / 16105
Top 48%
Masters (Masters Men)
#0 / 10463
Top 37%
Division (M40-44)
#0 / 2247
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:02
Rank: #6096
Start → 5K
21:02 | 6:46/mi
10K· 6.21 mi
42:01
Rank: #5957 (+139)
5K → 10K
20:59 | 6:45/mi
15K· 9.32 mi
1:03:24
Rank: #6235 (-278)
10K → 15K
21:23 | 6:53/mi
20K· 12.43 mi
1:25:22
Rank: #6579 (-344)
15K → 20K
21:58 | 7:04/mi
Half· 13.11 mi
1:30:11
Rank: #6670 (-91)
20K → Half
4:49 | 7:04/mi
25K· 15.53 mi
1:48:21
Rank: #7105 (-435)
Half → 25K
18:10 | 7:30/mi
30K· 18.64 mi
2:13:26
Rank: #7737 (-632)
25K → 30K
25:05 | 8:04/mi
20M
2:25:02
Rank: #8140 (-403)
30K → 20M
11:36 | 8:32/mi
21M
2:34:27
Rank: #8588 (-448)
20M → 21M
9:25 | 9:25/mi
35K· 21.75 mi
2:40:43
Rank: #8817 (-229)
21M → 35K
6:16 | 8:23/mi
23M
2:51:39
Rank: #9170 (-353)
35K → 23M
10:56 | 8:44/mi
24M
3:00:18
Rank: #9473 (-303)
23M → 24M
8:39 | 8:39/mi
40K· 24.85 mi
3:08:00
Rank: #9780 (-307)
24M → 40K
7:42 | 9:00/mi
25.2M
3:11:24
Rank: #9901 (-121)
40K → 25.2M
3:24 | 9:52/mi
Finish· 26.22 mi
3:19:52
Rank: #10098 (-197)
25.2M → Finish
8:28 | 8:19/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:30:11
Pace6:53 /mi
2nd Half
Distance13.11 mi
Time1:49:41
Pace8:22 /mi
📊Positive Split: 21.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:0921:026:4621:02
6:46
-
10K
6.21 mi10:47:0842:016:4620:59
6:45
-0:01
15K
9.32 mi11:08:311:03:246:4821:23
6:53
+0:08
20K
12.43 mi11:30:291:25:226:5221:58
7:04
+0:11
Half
13.11 mi11:35:181:30:116:534:49
7:04
0:00
25K
15.53 mi11:53:281:48:216:5818:10
7:30
+0:26
30K
18.64 mi12:18:332:13:267:0925:05
8:04
+0:34
20M
20.00 mi12:30:092:25:027:1511:36
8:32
+0:28
21M
21.00 mi12:39:342:34:277:219:25
9:25
+0:53
35K
21.75 mi12:45:502:40:437:236:16
8:23
-1:02
23M
23.00 mi12:56:462:51:397:2810:56
8:44
+0:21
24M
24.00 mi13:05:253:00:187:318:39
8:39
-0:05
40K
24.85 mi13:13:073:08:007:347:42
9:00
+0:21
25.2M
25.20 mi13:16:313:11:247:363:24
9:52
+0:52
Finish
26.22 mi13:24:593:19:527:388:28
8:19
-1:33

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

6:45 /mi

Average Pace

7:38 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:21

54% of race

Time at Steady Pace

1:11:00

36% of race

Time at Slower Pace

20:31

10% of race

Average Pace: 7:37 /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 mi10:26:0921:026:4621:02
6:46
#6096
10K
6.21 mi10:47:0842:016:4620:59
6:45
#5957
15K
9.32 mi11:08:311:03:246:4821:23
6:53
#6235
20K
12.43 mi11:30:291:25:226:5221:58
7:04
#6579
Half
13.11 mi11:35:181:30:116:534:49
7:04
#6670
25K
15.53 mi11:53:281:48:216:5818:10
7:30
#7105
30K
18.64 mi12:18:332:13:267:0925:05
8:04
#7737
20M
20.00 mi12:30:092:25:027:1511:36
8:32
#8140
21M
21.00 mi12:39:342:34:277:219:25
9:25
#8588
35K
21.75 mi12:45:502:40:437:236:16
8:23
#8817
23M
23.00 mi12:56:462:51:397:2810:56
8:44
#9170
24M
24.00 mi13:05:253:00:187:318:39
8:39
#9473
40K
24.85 mi13:13:073:08:007:347:42
9:00
#9780
25.2M
25.20 mi13:16:313:11:247:363:24
9:52
#9901
Finish
26.22 mi13:24:593:19:527:388:28
8:19
#10098
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6096559555956831(Top 24%)6126(Top 38%)6126(Top 273%)
10K6.21 mi3.10 mi5957+1395475+1205475+1205899(Top 21%)5400(Top 34%)5400(Top 240%)
15K9.32 mi3.11 mi6235-2785702-2275702-2276831(Top 24%)6126(Top 38%)6126(Top 273%)
20K12.43 mi3.11 mi6579-3445945-2435945-2437337(Top 26%)6453(Top 40%)6453(Top 287%)
Half13.11 mi0.68 mi6670-916023-786023-788017(Top 28%)6918(Top 43%)6918(Top 308%)
25K15.53 mi2.42 mi7105-4356334-3116334-3119887(Top 35%)7804(Top 48%)7804(Top 347%)
30K18.64 mi3.11 mi7737-6326714-3806714-38011894(Top 42%)8617(Top 54%)8617(Top 383%)
20M20.00 mi1.36 mi8140-4036923-2096923-20913979(Top 49%)9430(Top 59%)9430(Top 420%)
21M21.00 mi1.00 mi8588-4487163-2407163-24015667(Top 55%)10076(Top 63%)10076(Top 448%)
35K21.75 mi0.75 mi8817-2297276-1137276-11314684(Top 52%)9566(Top 59%)9566(Top 426%)
23M23.00 mi1.25 mi9170-3537433-1577433-15714706(Top 52%)9484(Top 59%)9484(Top 422%)
24M24.00 mi1.00 mi9473-3037562-1297562-12915410(Top 54%)9761(Top 61%)9761(Top 434%)
40K24.85 mi0.85 mi9780-3077685-1237685-12316283(Top 57%)10032(Top 62%)10032(Top 446%)
25.2M25.20 mi0.35 mi9901-1217733-487733-4816283(Top 57%)9993(Top 62%)9993(Top 445%)
Finish26.22 mi1.02 mi10098-1977801-687801-6814929(Top 53%)9439(Top 59%)9439(Top 420%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21stories
+97ft-345ft

Overall

6831

Males

6126

M40-44

6126

5K→10K

3.1 - 6.2 mi

Top 21%
×5stories
+79ft-138ft

Overall

5899

Males

5400

M40-44

5400

10K→15K

6.2 - 9.3 mi

Top 24%
×3stories
+67ft-78ft

Overall

6831

Males

6126

M40-44

6126

15K→20K

9.3 - 12.4 mi

Top 26%
×5stories
+106ft-86ft

Overall

7337

Males

6453

M40-44

6453

20K→Half

12.4 - 13.1 mi

Top 28%
×2stories
+19ft-37ft

Overall

8017

Males

6918

M40-44

6918

Half→25K

13.1 - 15.5 mi

Top 35%
×4stories
+66ft-88ft

Overall

9887

Males

7804

M40-44

7804

25K→30K

15.5 - 18.6 mi

Top 42%
×9stories
+181ft-148ft

Overall

11894

Males

8617

M40-44

8617

30K→20M

18.6 - 20.0 mi

Top 49%
×5stories
+64ft-50ft

Overall

13979

Males

9430

M40-44

9430

20M→21M

20.0 - 21.0 mi

Top 55%
×8stories
+106ft-24ft

Overall

15667

Males

10076

M40-44

10076

21M→35K

21.0 - 21.8 mi

Top 52%
×7stories
+17ft-86ft

Overall

14684

Males

9566

M40-44

9566

35K→23M

21.8 - 23.0 mi

Top 52%
×5stories
+23ft-63ft

Overall

14706

Males

9484

M40-44

9484

23M→24M

23.0 - 24.0 mi

Top 54%
×6stories
+12ft-82ft

Overall

15410

Males

9761

M40-44

9761

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16283

Males

10032

M40-44

10032

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

16283

Males

9993

M40-44

9993

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

14929

Males

9439

M40-44

9439

Passing Analysis

Category:
Athletes Passed
685
Passed By
4685
Net Change
-4002
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6096
5K → 10K249110+139#6096#5957
10K → 15K76354-278#5957#6235
15K → 20K66410-344#6235#6579
20K → Half495-91#6579#6670
Half → 25K38473-435#6670#7105
25K → 30K62694-632#7105#7737
30K → 20M29432-403#7737#8140
20M → 21M16464-448#8140#8588
21M → 35K16245-229#8588#8817
35K → 23M46399-353#8817#9170
23M → 24M27330-303#9170#9473
24M → 40K16323-307#9473#9780
40K → 25.2M10131-121#9780#9901
25.2M → Finish30225-197#9901#10098
TOTALS6854685-4002
📊

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