Boston Marathon logo
BOSTON MARATHON 2025

Andrew Chew

Bib: 1091•M

ON

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 2%
Gender (Male)
#0 / 16105
Top 3%
Division (M18-39)
#0 / 5642
Top 7%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:13
Rank: #723
Start → 5K
18:13 | 5:52/mi
10K· 6.21 mi
36:17
Rank: #666 (+57)
5K → 10K
18:04 | 5:49/mi
15K· 9.32 mi
54:27
Rank: #640 (+26)
10K → 15K
18:10 | 5:51/mi
20K· 12.43 mi
1:12:41
Rank: #611 (+29)
15K → 20K
18:14 | 5:52/mi
Half· 13.11 mi
1:16:37
Rank: #605 (+6)
20K → Half
3:56 | 5:46/mi
25K· 15.53 mi
1:31:01
Rank: #600 (+5)
Half → 25K
14:24 | 5:56/mi
30K· 18.64 mi
1:49:53
Rank: #579 (+21)
25K → 30K
18:52 | 6:04/mi
20M
1:58:10
Rank: #571 (+8)
30K → 20M
8:17 | 6:06/mi
21M
2:04:29
Rank: #557 (+14)
20M → 21M
6:19 | 6:19/mi
35K· 21.75 mi
2:08:58
Rank: #551 (+6)
21M → 35K
4:29 | 6:00/mi
23M
2:16:35
Rank: #536 (+15)
35K → 23M
7:37 | 6:05/mi
24M
2:22:29
Rank: #521 (+15)
23M → 24M
5:54 | 5:54/mi
40K· 24.85 mi
2:27:35
Rank: #504 (+17)
24M → 40K
5:06 | 5:58/mi
25.2M
2:29:52
Rank: #498 (+6)
40K → 25.2M
2:17 | 6:37/mi
Finish· 26.22 mi
2:36:01
Rank: #497 (+1)
25.2M → Finish
6:09 | 6:02/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:16:37
Pace5:51 /mi
2nd Half
Distance13.11 mi
Time1:19:24
Pace6:03 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:2518:135:5218:13
5:52
-
10K
6.21 mi10:36:2936:175:5018:04
5:49
-0:03
15K
9.32 mi10:54:3954:275:5118:10
5:51
+0:02
20K
12.43 mi11:12:531:12:415:5118:14
5:52
+0:01
Half
13.11 mi11:16:491:16:375:513:56
5:46
-0:06
25K
15.53 mi11:31:131:31:015:5214:24
5:56
+0:10
30K
18.64 mi11:50:051:49:535:5418:52
6:04
+0:08
20M
20.00 mi11:58:221:58:105:548:17
6:06
+0:02
21M
21.00 mi12:04:412:04:295:566:19
6:19
+0:13
35K
21.75 mi12:09:102:08:585:564:29
6:00
-0:19
23M
23.00 mi12:16:472:16:355:567:37
6:05
+0:05
24M
24.00 mi12:22:412:22:295:565:54
5:54
-0:11
40K
24.85 mi12:27:472:27:355:565:06
5:58
+0:04
25.2M
25.20 mi12:30:042:29:525:572:17
6:37
+0:39
Finish
26.22 mi12:36:132:36:015:576:09
6:02
-0:35

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

5:46 /mi

Average Pace

5:57 /mi

Slowest Pace

6:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:33:44

99% of race

Time at Steady Pace

2:17

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:57 /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 mi10:18:2518:135:5218:13
5:52
#723
10K
6.21 mi10:36:2936:175:5018:04
5:49
#666
15K
9.32 mi10:54:3954:275:5118:10
5:51
#640
20K
12.43 mi11:12:531:12:415:5118:14
5:52
#611
Half
13.11 mi11:16:491:16:375:513:56
5:46
#605
25K
15.53 mi11:31:131:31:015:5214:24
5:56
#600
30K
18.64 mi11:50:051:49:535:5418:52
6:04
#579
20M
20.00 mi11:58:221:58:105:548:17
6:06
#571
21M
21.00 mi12:04:412:04:295:566:19
6:19
#557
35K
21.75 mi12:09:102:08:585:564:29
6:00
#551
23M
23.00 mi12:16:472:16:355:567:37
6:05
#536
24M
24.00 mi12:22:412:22:295:565:54
5:54
#521
40K
24.85 mi12:27:472:27:355:565:06
5:58
#504
25.2M
25.20 mi12:30:042:29:525:572:17
6:37
#498
Finish
26.22 mi12:36:132:36:015:576:09
6:02
#497
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi723672672626(Top 2%)580(Top 4%)580(Top 10%)
10K6.21 mi3.10 mi666+57620+52620+52636(Top 2%)592(Top 4%)592(Top 10%)
15K9.32 mi3.11 mi640+26595+25595+25626(Top 2%)580(Top 4%)580(Top 10%)
20K12.43 mi3.11 mi611+29565+30565+30550(Top 2%)507(Top 3%)507(Top 9%)
Half13.11 mi0.68 mi605+6559+6559+6513(Top 2%)481(Top 3%)481(Top 9%)
25K15.53 mi2.42 mi600+5555+4555+4653(Top 2%)606(Top 4%)606(Top 11%)
30K18.64 mi3.11 mi579+21534+21534+21619(Top 2%)578(Top 4%)578(Top 10%)
20M20.00 mi1.36 mi571+8526+8526+8525(Top 2%)492(Top 3%)492(Top 9%)
21M21.00 mi1.00 mi557+14512+14512+14385(Top 1%)362(Top 2%)362(Top 6%)
35K21.75 mi0.75 mi551+6506+6506+6701(Top 2%)654(Top 4%)654(Top 12%)
23M23.00 mi1.25 mi536+15493+13493+13453(Top 2%)426(Top 3%)426(Top 8%)
24M24.00 mi1.00 mi521+15478+15478+15399(Top 1%)370(Top 2%)370(Top 7%)
40K24.85 mi0.85 mi504+17463+15463+15344(Top 1%)318(Top 2%)318(Top 6%)
25.2M25.20 mi0.35 mi498+6459+4459+4611(Top 2%)566(Top 4%)566(Top 10%)
Finish26.22 mi1.02 mi497+1458+1458+1986(Top 3%)924(Top 6%)924(Top 16%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

626

Males

580

M18-39

580

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

636

Males

592

M18-39

592

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

626

Males

580

M18-39

580

15K→20K

9.3 - 12.4 mi

Top 2%
×5stories
+106ft-86ft

Overall

550

Males

507

M18-39

507

20K→Half

12.4 - 13.1 mi

Top 2%
×2stories
+19ft-37ft

Overall

513

Males

481

M18-39

481

Half→25K

13.1 - 15.5 mi

Top 2%
×4stories
+66ft-88ft

Overall

653

Males

606

M18-39

606

25K→30K

15.5 - 18.6 mi

Top 2%
×9stories
+181ft-148ft

Overall

619

Males

578

M18-39

578

30K→20M

18.6 - 20.0 mi

Top 2%
×5stories
+64ft-50ft

Overall

525

Males

492

M18-39

492

20M→21M

20.0 - 21.0 mi

Top 1%
×8stories
+106ft-24ft

Overall

385

Males

362

M18-39

362

21M→35K

21.0 - 21.8 mi

Top 2%
×7stories
+17ft-86ft

Overall

701

Males

654

M18-39

654

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

453

Males

426

M18-39

426

23M→24M

23.0 - 24.0 mi

Top 1%
×6stories
+12ft-82ft

Overall

399

Males

370

M18-39

370

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

344

Males

318

M18-39

318

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

611

Males

566

M18-39

566

25.2M→Finish

25.2 - 26.2 mi

Top 3%
×2stories
+22ft-21ft

Overall

986

Males

924

M18-39

924

Passing Analysis

Category:
Athletes Passed
337
Passed By
111
Net Change
+226
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#723
5K → 10K6912+57#723#666
10K → 15K337+26#666#640
15K → 20K4112+29#640#611
20K → Half82+6#611#605
Half → 25K2217+5#605#600
25K → 30K4120+21#600#579
30K → 20M146+8#579#571
20M → 21M206+14#571#557
21M → 35K104+6#557#551
35K → 23M216+15#551#536
23M → 24M172+15#536#521
24M → 40K203+17#521#504
40K → 25.2M82+6#504#498
25.2M → Finish1312+1#498#497
TOTALS337111+226
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing