Boston Marathon logo
BOSTON MARATHON 2025

Baldwin Choy

Bib: 6508•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 39%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:54
Rank: #8197
Start → 5K
21:54 | 7:03/mi
10K· 6.21 mi
43:58
Rank: #8462 (-265)
5K → 10K
22:04 | 7:06/mi
15K· 9.32 mi
1:06:10
Rank: #8463 (-1)
10K → 15K
22:12 | 7:09/mi
20K· 12.43 mi
1:28:34
Rank: #8352 (+111)
15K → 20K
22:24 | 7:13/mi
Half· 13.11 mi
1:33:21
Rank: #8306 (+46)
20K → Half
4:47 | 7:01/mi
25K· 15.53 mi
1:50:52
Rank: #8194 (+112)
Half → 25K
17:31 | 7:13/mi
30K· 18.64 mi
2:14:18
Rank: #8051 (+143)
25K → 30K
23:26 | 7:33/mi
20M
2:24:43
Rank: #8024 (+27)
30K → 20M
10:25 | 7:40/mi
21M
2:32:45
Rank: #7916 (+108)
20M → 21M
8:02 | 8:02/mi
35K· 21.75 mi
2:38:25
Rank: #7926 (-10)
21M → 35K
5:40 | 7:34/mi
23M
2:48:12
Rank: #7904 (+22)
35K → 23M
9:47 | 7:49/mi
24M
2:55:44
Rank: #7898 (+6)
23M → 24M
7:32 | 7:32/mi
40K· 24.85 mi
3:02:16
Rank: #7837 (+61)
24M → 40K
6:32 | 7:38/mi
25.2M
3:04:59
Rank: #7766 (+71)
40K → 25.2M
2:43 | 7:53/mi
Finish· 26.22 mi
3:11:53
Rank: #7575 (+191)
25.2M → Finish
6:54 | 6:46/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
Time1:33:21
Pace7:07 /mi
2nd Half
Distance13.11 mi
Time1:38:32
Pace7:31 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:26:1721:547:0321:54
7:03
-
10K
6.21 mi10:48:2143:587:0522:04
7:06
+0:03
15K
9.32 mi11:10:331:06:107:0622:12
7:09
+0:03
20K
12.43 mi11:32:571:28:347:0822:24
7:13
+0:04
Half
13.11 mi11:37:441:33:217:074:47
7:01
-0:12
25K
15.53 mi11:55:151:50:527:0817:31
7:13
+0:12
30K
18.64 mi12:18:412:14:187:1223:26
7:33
+0:20
20M
20.00 mi12:29:062:24:437:1410:25
7:40
+0:07
21M
21.00 mi12:37:082:32:457:168:02
8:02
+0:22
35K
21.75 mi12:42:482:38:257:175:40
7:34
-0:28
23M
23.00 mi12:52:352:48:127:199:47
7:49
+0:15
24M
24.00 mi13:00:072:55:447:197:32
7:32
-0:17
40K
24.85 mi13:06:393:02:167:206:32
7:38
+0:06
25.2M
25.20 mi13:09:223:04:597:202:43
7:53
+0:15
Finish
26.22 mi13:16:163:11:537:196:54
6:46
-1:07

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

6:46 /mi

Average Pace

7:19 /mi

Slowest Pace

8:02 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:46

61% of race

Time at Steady Pace

1:06:05

34% of race

Time at Slower Pace

8:02

4% of race

Average Pace: 7:19 /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 mi10:26:1721:547:0321:54
7:03
#8197
10K
6.21 mi10:48:2143:587:0522:04
7:06
#8462
15K
9.32 mi11:10:331:06:107:0622:12
7:09
#8463
20K
12.43 mi11:32:571:28:347:0822:24
7:13
#8352
Half
13.11 mi11:37:441:33:217:074:47
7:01
#8306
25K
15.53 mi11:55:151:50:527:0817:31
7:13
#8194
30K
18.64 mi12:18:412:14:187:1223:26
7:33
#8051
20M
20.00 mi12:29:062:24:437:1410:25
7:40
#8024
21M
21.00 mi12:37:082:32:457:168:02
8:02
#7916
35K
21.75 mi12:42:482:38:257:175:40
7:34
#7926
23M
23.00 mi12:52:352:48:127:199:47
7:49
#7904
24M
24.00 mi13:00:072:55:447:197:32
7:32
#7898
40K
24.85 mi13:06:393:02:167:206:32
7:38
#7837
25.2M
25.20 mi13:09:223:04:597:202:43
7:53
#7766
Finish
26.22 mi13:16:163:11:537:196:54
6:46
#7575
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi8197711971198659(Top 30%)7345(Top 46%)7345(Top 130%)
10K6.21 mi3.10 mi8462-2657273-1547273-1548683(Top 31%)7405(Top 46%)7405(Top 131%)
15K9.32 mi3.11 mi8463-17257+167257+168659(Top 30%)7345(Top 46%)7345(Top 130%)
20K12.43 mi3.11 mi8352+1117164+937164+938273(Top 29%)7027(Top 44%)7027(Top 125%)
Half13.11 mi0.68 mi8306+467136+287136+287634(Top 27%)6655(Top 41%)6655(Top 118%)
25K15.53 mi2.42 mi8194+1127045+917045+917770(Top 27%)6617(Top 41%)6617(Top 117%)
30K18.64 mi3.11 mi8051+1436896+1496896+1498026(Top 28%)6603(Top 41%)6603(Top 117%)
20M20.00 mi1.36 mi8024+276848+486848+488099(Top 29%)6497(Top 40%)6497(Top 115%)
21M21.00 mi1.00 mi7916+1086752+966752+967502(Top 26%)5967(Top 37%)5967(Top 106%)
35K21.75 mi0.75 mi7926-106734+186734+189105(Top 32%)6895(Top 43%)6895(Top 122%)
23M23.00 mi1.25 mi7904+226676+586676+588651(Top 30%)6517(Top 40%)6517(Top 116%)
24M24.00 mi1.00 mi7898+66636+406636+407900(Top 28%)6044(Top 38%)6044(Top 107%)
40K24.85 mi0.85 mi7837+616573+636573+637669(Top 27%)5807(Top 36%)5807(Top 103%)
25.2M25.20 mi0.35 mi7766+716508+656508+655260(Top 19%)4281(Top 27%)4281(Top 76%)
Finish26.22 mi1.02 mi7575+1916359+1496359+1494316(Top 15%)3660(Top 23%)3660(Top 65%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21stories
+97ft-345ft

Overall

8659

Males

7345

M18-39

7345

5K→10K

3.1 - 6.2 mi

Top 31%
×5stories
+79ft-138ft

Overall

8683

Males

7405

M18-39

7405

10K→15K

6.2 - 9.3 mi

Top 30%
×3stories
+67ft-78ft

Overall

8659

Males

7345

M18-39

7345

15K→20K

9.3 - 12.4 mi

Top 29%
×5stories
+106ft-86ft

Overall

8273

Males

7027

M18-39

7027

20K→Half

12.4 - 13.1 mi

Top 27%
×2stories
+19ft-37ft

Overall

7634

Males

6655

M18-39

6655

Half→25K

13.1 - 15.5 mi

Top 27%
×4stories
+66ft-88ft

Overall

7770

Males

6617

M18-39

6617

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

8026

Males

6603

M18-39

6603

30K→20M

18.6 - 20.0 mi

Top 29%
×5stories
+64ft-50ft

Overall

8099

Males

6497

M18-39

6497

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

7502

Males

5967

M18-39

5967

21M→35K

21.0 - 21.8 mi

Top 32%
×7stories
+17ft-86ft

Overall

9105

Males

6895

M18-39

6895

35K→23M

21.8 - 23.0 mi

Top 30%
×5stories
+23ft-63ft

Overall

8651

Males

6517

M18-39

6517

23M→24M

23.0 - 24.0 mi

Top 28%
×6stories
+12ft-82ft

Overall

7900

Males

6044

M18-39

6044

24M→40K

24.0 - 24.9 mi

Top 27%
×1story
+6ft-20ft

Overall

7669

Males

5807

M18-39

5807

40K→25.2M

24.9 - 25.2 mi

Top 19%
×1story
+13ft-16ft

Overall

5260

Males

4281

M18-39

4281

25.2M→Finish

25.2 - 26.2 mi

Top 15%
×2stories
+22ft-21ft

Overall

4316

Males

3660

M18-39

3660

Passing Analysis

Category:
Athletes Passed
1846
Passed By
1224
Net Change
+622
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8197
5K → 10K104369-265#8197#8462
10K → 15K163164-1#8462#8463
15K → 20K215104+111#8463#8352
20K → Half5711+46#8352#8306
Half → 25K18169+112#8306#8194
25K → 30K247104+143#8194#8051
30K → 20M11790+27#8051#8024
20M → 21M15547+108#8024#7916
21M → 35K5161-10#7916#7926
35K → 23M11593+22#7926#7904
23M → 24M7569+6#7904#7898
24M → 40K9534+61#7898#7837
40K → 25.2M754+71#7837#7766
25.2M → Finish1965+191#7766#7575
TOTALS18461224+622
📊

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