Boston Marathon logo
BOSTON MARATHON 2025

Jason Ng

Bib: 8113•M

BC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 22%
Masters (Masters Men)
#0 / 10463
Top 9%
Division (M40-44)
#0 / 2247
Top 24%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:41
Rank: #5061
Start → 5K
20:41 | 6:39/mi
10K· 6.21 mi
41:32
Rank: #5220 (-159)
5K → 10K
20:51 | 6:43/mi
15K· 9.32 mi
1:02:19
Rank: #5107 (+113)
10K → 15K
20:47 | 6:41/mi
20K· 12.43 mi
1:23:18
Rank: #5015 (+92)
15K → 20K
20:59 | 6:45/mi
Half· 13.11 mi
1:27:53
Rank: #5026 (-11)
20K → Half
4:35 | 6:43/mi
25K· 15.53 mi
1:44:15
Rank: #4894 (+132)
Half → 25K
16:22 | 6:45/mi
30K· 18.64 mi
2:05:24
Rank: #4543 (+351)
25K → 30K
21:09 | 6:48/mi
20M
2:14:40
Rank: #4362 (+181)
30K → 20M
9:16 | 6:49/mi
21M
2:21:47
Rank: #4208 (+154)
20M → 21M
7:07 | 7:07/mi
35K· 21.75 mi
2:26:44
Rank: #4151 (+57)
21M → 35K
4:57 | 6:37/mi
23M
2:35:14
Rank: #4017 (+134)
35K → 23M
8:30 | 6:47/mi
24M
2:41:54
Rank: #3931 (+86)
23M → 24M
6:40 | 6:40/mi
40K· 24.85 mi
2:47:47
Rank: #3872 (+59)
24M → 40K
5:53 | 6:53/mi
25.2M
2:50:24
Rank: #3849 (+23)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
2:57:16
Rank: #3813 (+36)
25.2M → Finish
6:52 | 6:44/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
Time1:27:53
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:29:23
Pace6:49 /mi
📊Positive Split: 1.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:28:5220:416:3920:41
6:39
-
10K
6.21 mi10:49:4341:326:4120:51
6:43
+0:04
15K
9.32 mi11:10:301:02:196:4120:47
6:41
-0:02
20K
12.43 mi11:31:291:23:186:4220:59
6:45
+0:04
Half
13.11 mi11:36:041:27:536:424:35
6:43
-0:02
25K
15.53 mi11:52:261:44:156:4316:22
6:45
+0:02
30K
18.64 mi12:13:352:05:246:4421:09
6:48
+0:03
20M
20.00 mi12:22:512:14:406:449:16
6:49
+0:01
21M
21.00 mi12:29:582:21:476:457:07
7:07
+0:18
35K
21.75 mi12:34:552:26:446:454:57
6:37
-0:30
23M
23.00 mi12:43:252:35:146:458:30
6:47
+0:10
24M
24.00 mi12:50:052:41:546:456:40
6:40
-0:07
40K
24.85 mi12:55:582:47:476:455:53
6:53
+0:13
25.2M
25.20 mi12:58:352:50:246:462:37
7:35
+0:42
Finish
26.22 mi13:05:272:57:166:466:52
6:44
-0:51

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

6:37 /mi

Average Pace

6:46 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:54:39

99% of race

Time at Steady Pace

2:37

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:46 /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 mi10:28:5220:416:3920:41
6:39
#5061
10K
6.21 mi10:49:4341:326:4120:51
6:43
#5220
15K
9.32 mi11:10:301:02:196:4120:47
6:41
#5107
20K
12.43 mi11:31:291:23:186:4220:59
6:45
#5015
Half
13.11 mi11:36:041:27:536:424:35
6:43
#5026
25K
15.53 mi11:52:261:44:156:4316:22
6:45
#4894
30K
18.64 mi12:13:352:05:246:4421:09
6:48
#4543
20M
20.00 mi12:22:512:14:406:449:16
6:49
#4362
21M
21.00 mi12:29:582:21:476:457:07
7:07
#4208
35K
21.75 mi12:34:552:26:446:454:57
6:37
#4151
23M
23.00 mi12:43:252:35:146:458:30
6:47
#4017
24M
24.00 mi12:50:052:41:546:456:40
6:40
#3931
40K
24.85 mi12:55:582:47:476:455:53
6:53
#3872
25.2M
25.20 mi12:58:352:50:246:462:37
7:35
#3849
Finish
26.22 mi13:05:272:57:166:466:52
6:44
#3813
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5061472347234974(Top 18%)4626(Top 29%)4626(Top 206%)
10K6.21 mi3.10 mi5220-1594853-1304853-1305421(Top 19%)5005(Top 31%)5005(Top 223%)
15K9.32 mi3.11 mi5107+1134754+994754+994974(Top 18%)4626(Top 29%)4626(Top 206%)
20K12.43 mi3.11 mi5015+924668+864668+864858(Top 17%)4495(Top 28%)4495(Top 200%)
Half13.11 mi0.68 mi5026-114672-44672-45339(Top 19%)4894(Top 30%)4894(Top 218%)
25K15.53 mi2.42 mi4894+1324547+1254547+1254467(Top 16%)4127(Top 26%)4127(Top 184%)
30K18.64 mi3.11 mi4543+3514232+3154232+3153481(Top 12%)3236(Top 20%)3236(Top 144%)
20M20.00 mi1.36 mi4362+1814070+1624070+1623037(Top 11%)2827(Top 18%)2827(Top 126%)
21M21.00 mi1.00 mi4208+1543924+1463924+1462751(Top 10%)2554(Top 16%)2554(Top 114%)
35K21.75 mi0.75 mi4151+573868+563868+563040(Top 11%)2795(Top 17%)2795(Top 124%)
23M23.00 mi1.25 mi4017+1343740+1283740+1282637(Top 9%)2429(Top 15%)2429(Top 108%)
24M24.00 mi1.00 mi3931+863655+853655+852785(Top 10%)2552(Top 16%)2552(Top 114%)
40K24.85 mi0.85 mi3872+593597+583597+583241(Top 11%)2893(Top 18%)2893(Top 129%)
25.2M25.20 mi0.35 mi3849+233574+233574+233761(Top 13%)3243(Top 20%)3243(Top 144%)
Finish26.22 mi1.02 mi3813+363536+383536+384100(Top 14%)3503(Top 22%)3503(Top 156%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 18%
×21stories
+97ft-345ft

Overall

4974

Males

4626

M40-44

4626

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5421

Males

5005

M40-44

5005

10K→15K

6.2 - 9.3 mi

Top 18%
×3stories
+67ft-78ft

Overall

4974

Males

4626

M40-44

4626

15K→20K

9.3 - 12.4 mi

Top 17%
×5stories
+106ft-86ft

Overall

4858

Males

4495

M40-44

4495

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

5339

Males

4894

M40-44

4894

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4467

Males

4127

M40-44

4127

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3481

Males

3236

M40-44

3236

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

3037

Males

2827

M40-44

2827

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2751

Males

2554

M40-44

2554

21M→35K

21.0 - 21.8 mi

Top 11%
×7stories
+17ft-86ft

Overall

3040

Males

2795

M40-44

2795

35K→23M

21.8 - 23.0 mi

Top 9%
×5stories
+23ft-63ft

Overall

2637

Males

2429

M40-44

2429

23M→24M

23.0 - 24.0 mi

Top 10%
×6stories
+12ft-82ft

Overall

2785

Males

2552

M40-44

2552

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3241

Males

2893

M40-44

2893

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3761

Males

3243

M40-44

3243

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

4100

Males

3503

M40-44

3503

Passing Analysis

Category:
Athletes Passed
1866
Passed By
618
Net Change
+1248
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5061
5K → 10K112271-159#5061#5220
10K → 15K20390+113#5220#5107
15K → 20K16472+92#5107#5015
20K → Half2334-11#5015#5026
Half → 25K16634+132#5026#4894
25K → 30K37120+351#4894#4543
30K → 20M1854+181#4543#4362
20M → 21M1606+154#4362#4208
21M → 35K669+57#4208#4151
35K → 23M1428+134#4151#4017
23M → 24M9913+86#4017#3931
24M → 40K7112+59#3931#3872
40K → 25.2M318+23#3872#3849
25.2M → Finish7337+36#3849#3813
TOTALS1866618+1248
📊

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