Boston Marathon logo
BOSTON MARATHON 2025

J Brown

Bib: 12869•M

IN

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M45-49)
#0 / 2386
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:28
Rank: #18066
Start → 5K
25:28 | 8:12/mi
10K· 6.21 mi
51:54
Rank: #18936 (-870)
5K → 10K
26:26 | 8:30/mi
15K· 9.32 mi
1:18:27
Rank: #19126 (-190)
10K → 15K
26:33 | 8:33/mi
20K· 12.43 mi
1:45:19
Rank: #19108 (+18)
15K → 20K
26:52 | 8:39/mi
Half· 13.11 mi
1:51:03
Rank: #19062 (+46)
20K → Half
5:44 | 8:24/mi
25K· 15.53 mi
2:12:00
Rank: #18881 (+181)
Half → 25K
20:57 | 8:38/mi
30K· 18.64 mi
2:39:33
Rank: #18500 (+381)
25K → 30K
27:33 | 8:52/mi
20M
2:51:39
Rank: #18320 (+180)
30K → 20M
12:06 | 8:54/mi
21M
3:00:48
Rank: #18065 (+255)
20M → 21M
9:09 | 9:09/mi
35K· 21.75 mi
3:07:25
Rank: #18038 (+27)
21M → 35K
6:37 | 8:51/mi
23M
3:18:58
Rank: #17976 (+62)
35K → 23M
11:33 | 9:13/mi
24M
3:27:34
Rank: #17829 (+147)
23M → 24M
8:36 | 8:36/mi
40K· 24.85 mi
3:34:56
Rank: #17688 (+141)
24M → 40K
7:22 | 8:37/mi
25.2M
3:39:06
Rank: #17857 (-169)
40K → 25.2M
4:10 | 12:05/mi
Finish· 26.22 mi
3:47:22
Rank: #17699 (+158)
25.2M → Finish
8:16 | 8:07/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
Time1:51:03
Pace8:28 /mi
2nd Half
Distance13.11 mi
Time1:56:19
Pace8:52 /mi
📊Positive Split: 4.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:5925:288:1225:28
8:12
-
10K
6.21 mi11:20:2551:548:2126:26
8:30
+0:18
15K
9.32 mi11:46:581:18:278:2526:33
8:33
+0:03
20K
12.43 mi12:13:501:45:198:2826:52
8:39
+0:06
Half
13.11 mi12:19:341:51:038:285:44
8:24
-0:15
25K
15.53 mi12:40:312:12:008:3020:57
8:38
+0:14
30K
18.64 mi13:08:042:39:338:3427:33
8:52
+0:14
20M
20.00 mi13:20:102:51:398:3512:06
8:54
+0:02
21M
21.00 mi13:29:193:00:488:379:09
9:09
+0:15
35K
21.75 mi13:35:563:07:258:376:37
8:51
-0:18
23M
23.00 mi13:47:293:18:588:3911:33
9:13
+0:22
24M
24.00 mi13:56:053:27:348:398:36
8:36
-0:37
40K
24.85 mi14:03:273:34:568:397:22
8:37
+0:01
25.2M
25.20 mi14:07:373:39:068:424:10
12:05
+3:28
Finish
26.22 mi14:15:533:47:228:418:16
8:07
-3:58

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

8:07 /mi

Average Pace

8:41 /mi

Slowest Pace

12:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

8:16

4% of race

Time at Steady Pace

3:14:14

85% of race

Time at Slower Pace

24:52

11% of race

Average Pace: 8:40 /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 mi10:53:5925:288:1225:28
8:12
#18066
10K
6.21 mi11:20:2551:548:2126:26
8:30
#18936
15K
9.32 mi11:46:581:18:278:2526:33
8:33
#19126
20K
12.43 mi12:13:501:45:198:2826:52
8:39
#19108
Half
13.11 mi12:19:341:51:038:285:44
8:24
#19062
25K
15.53 mi12:40:312:12:008:3020:57
8:38
#18881
30K
18.64 mi13:08:042:39:338:3427:33
8:52
#18500
20M
20.00 mi13:20:102:51:398:3512:06
8:54
#18320
21M
21.00 mi13:29:193:00:488:379:09
9:09
#18065
35K
21.75 mi13:35:563:07:258:376:37
8:51
#18038
23M
23.00 mi13:47:293:18:588:3911:33
9:13
#17976
24M
24.00 mi13:56:053:27:348:398:36
8:36
#17829
40K
24.85 mi14:03:273:34:568:397:22
8:37
#17688
25.2M
25.20 mi14:07:373:39:068:424:10
12:05
#17857
Finish
26.22 mi14:15:533:47:228:418:16
8:07
#17699
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi18066116261162619595(Top 69%)12318(Top 76%)12318(Top 516%)
10K6.21 mi3.10 mi18936-87012013-38712013-38719834(Top 70%)12397(Top 77%)12397(Top 520%)
15K9.32 mi3.11 mi19126-19012096-8312096-8319595(Top 69%)12318(Top 76%)12318(Top 516%)
20K12.43 mi3.11 mi19108+1812088+812088+819115(Top 67%)12080(Top 75%)12080(Top 506%)
Half13.11 mi0.68 mi19062+4612063+2512063+2518574(Top 65%)11847(Top 74%)11847(Top 497%)
25K15.53 mi2.42 mi18881+18111978+8511978+8518035(Top 63%)11536(Top 72%)11536(Top 483%)
30K18.64 mi3.11 mi18500+38111787+19111787+19116984(Top 60%)10919(Top 68%)10919(Top 458%)
20M20.00 mi1.36 mi18320+18011672+11511672+11516250(Top 57%)10467(Top 65%)10467(Top 439%)
21M21.00 mi1.00 mi18065+25511544+12811544+12814347(Top 51%)9502(Top 59%)9502(Top 398%)
35K21.75 mi0.75 mi18038+2711518+2611518+2617455(Top 61%)10805(Top 67%)10805(Top 453%)
23M23.00 mi1.25 mi17976+6211442+7611442+7617435(Top 61%)10711(Top 67%)10711(Top 449%)
24M24.00 mi1.00 mi17829+14711340+10211340+10215158(Top 53%)9660(Top 60%)9660(Top 405%)
40K24.85 mi0.85 mi17688+14111256+8411256+8414150(Top 50%)9077(Top 56%)9077(Top 380%)
25.2M25.20 mi0.35 mi17857-16911330-7411330-7423369(Top 82%)13449(Top 84%)13449(Top 564%)
Finish26.22 mi1.02 mi17699+15811239+9111239+9113674(Top 48%)8863(Top 55%)8863(Top 371%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

19595

Males

12318

M45-49

12318

5K→10K

3.1 - 6.2 mi

Top 70%
×5stories
+79ft-138ft

Overall

19834

Males

12397

M45-49

12397

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

19595

Males

12318

M45-49

12318

15K→20K

9.3 - 12.4 mi

Top 67%
×5stories
+106ft-86ft

Overall

19115

Males

12080

M45-49

12080

20K→Half

12.4 - 13.1 mi

Top 65%
×2stories
+19ft-37ft

Overall

18574

Males

11847

M45-49

11847

Half→25K

13.1 - 15.5 mi

Top 63%
×4stories
+66ft-88ft

Overall

18035

Males

11536

M45-49

11536

25K→30K

15.5 - 18.6 mi

Top 60%
×9stories
+181ft-148ft

Overall

16984

Males

10919

M45-49

10919

30K→20M

18.6 - 20.0 mi

Top 57%
×5stories
+64ft-50ft

Overall

16250

Males

10467

M45-49

10467

20M→21M

20.0 - 21.0 mi

Top 51%
×8stories
+106ft-24ft

Overall

14347

Males

9502

M45-49

9502

21M→35K

21.0 - 21.8 mi

Top 61%
×7stories
+17ft-86ft

Overall

17455

Males

10805

M45-49

10805

35K→23M

21.8 - 23.0 mi

Top 61%
×5stories
+23ft-63ft

Overall

17435

Males

10711

M45-49

10711

23M→24M

23.0 - 24.0 mi

Top 53%
×6stories
+12ft-82ft

Overall

15158

Males

9660

M45-49

9660

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

14150

Males

9077

M45-49

9077

40K→25.2M

24.9 - 25.2 mi

Top 82%
×1story
+13ft-16ft

Overall

23369

Males

13449

M45-49

13449

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13674

Males

8863

M45-49

8863

Passing Analysis

Category:
Athletes Passed
2316
Passed By
1949
Net Change
+367
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18066
5K → 10K60930-870#18066#18936
10K → 15K139329-190#18936#19126
15K → 20K203185+18#19126#19108
20K → Half6317+46#19108#19062
Half → 25K24261+181#19062#18881
25K → 30K45271+381#18881#18500
30K → 20M21030+180#18500#18320
20M → 21M2616+255#18320#18065
21M → 35K6538+27#18065#18038
35K → 23M13977+62#18038#17976
23M → 24M16114+147#17976#17829
24M → 40K1465+141#17829#17688
40K → 25.2M6175-169#17688#17857
25.2M → Finish16911+158#17857#17699
TOTALS23161949+367
📊

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