Boston Marathon logo
BOSTON MARATHON 2025

Zachary Brun

Bib: 4063•M

ON

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 23%
Gender (Male)
#0 / 16105
Top 36%
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
20:31
Rank: #4642
Start → 5K
20:31 | 6:36/mi
10K· 6.21 mi
40:43
Rank: #4158 (+484)
5K → 10K
20:12 | 6:30/mi
15K· 9.32 mi
1:01:12
Rank: #4147 (+11)
10K → 15K
20:29 | 6:36/mi
20K· 12.43 mi
1:22:02
Rank: #4175 (-28)
15K → 20K
20:50 | 6:42/mi
Half· 13.11 mi
1:26:34
Rank: #4201 (-26)
20K → Half
4:32 | 6:39/mi
25K· 15.53 mi
1:43:04
Rank: #4257 (-56)
Half → 25K
16:30 | 6:48/mi
30K· 18.64 mi
2:04:50
Rank: #4297 (-40)
25K → 30K
21:46 | 7:00/mi
20M
2:14:40
Rank: #4369 (-72)
30K → 20M
9:50 | 7:14/mi
21M
2:22:17
Rank: #4416 (-47)
20M → 21M
7:37 | 7:37/mi
35K· 21.75 mi
2:27:38
Rank: #4469 (-53)
21M → 35K
5:21 | 7:09/mi
23M
2:38:05
Rank: #4988 (-519)
35K → 23M
10:27 | 8:21/mi
24M
2:46:24
Rank: #5320 (-332)
23M → 24M
8:19 | 8:19/mi
40K· 24.85 mi
2:54:45
Rank: #5768 (-448)
24M → 40K
8:21 | 9:46/mi
25.2M
2:58:42
Rank: #6019 (-251)
40K → 25.2M
3:57 | 11:27/mi
Finish· 26.22 mi
3:08:26
Rank: #6607 (-588)
25.2M → Finish
9:44 | 9:33/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
Time1:26:34
Pace6:36 /mi
2nd Half
Distance13.11 mi
Time1:41:52
Pace7:46 /mi
📊Positive Split: 17.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:4620:316:3620:31
6:36
-
10K
6.21 mi10:43:5840:436:3320:12
6:30
-0:06
15K
9.32 mi11:04:271:01:126:3420:29
6:36
+0:06
20K
12.43 mi11:25:171:22:026:3620:50
6:42
+0:06
Half
13.11 mi11:29:491:26:346:364:32
6:39
-0:03
25K
15.53 mi11:46:191:43:046:3816:30
6:48
+0:09
30K
18.64 mi12:08:052:04:506:4221:46
7:00
+0:12
20M
20.00 mi12:17:552:14:406:449:50
7:14
+0:14
21M
21.00 mi12:25:322:22:176:477:37
7:37
+0:23
35K
21.75 mi12:30:532:27:386:475:21
7:09
-0:28
23M
23.00 mi12:41:202:38:056:5210:27
8:21
+1:12
24M
24.00 mi12:49:392:46:246:568:19
8:19
-0:02
40K
24.85 mi12:58:002:54:457:028:21
9:46
+1:27
25.2M
25.20 mi13:01:572:58:427:053:57
11:27
+1:41
Finish
26.22 mi13:11:413:08:267:129:44
9:33
-1:54

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

6:30 /mi

Average Pace

7:12 /mi

Slowest Pace

11:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

0:00

0% of race

Time at Steady Pace

2:27:38

78% of race

Time at Slower Pace

40:48

22% of race

Average Pace: 7:11 /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 mi10:23:4620:316:3620:31
6:36
#4642
10K
6.21 mi10:43:5840:436:3320:12
6:30
#4158
15K
9.32 mi11:04:271:01:126:3420:29
6:36
#4147
20K
12.43 mi11:25:171:22:026:3620:50
6:42
#4175
Half
13.11 mi11:29:491:26:346:364:32
6:39
#4201
25K
15.53 mi11:46:191:43:046:3816:30
6:48
#4257
30K
18.64 mi12:08:052:04:506:4221:46
7:00
#4297
20M
20.00 mi12:17:552:14:406:449:50
7:14
#4369
21M
21.00 mi12:25:322:22:176:477:37
7:37
#4416
35K
21.75 mi12:30:532:27:386:475:21
7:09
#4469
23M
23.00 mi12:41:202:38:056:5210:27
8:21
#4988
24M
24.00 mi12:49:392:46:246:568:19
8:19
#5320
40K
24.85 mi12:58:002:54:457:028:21
9:46
#5768
25.2M
25.20 mi13:01:572:58:427:053:57
11:27
#6019
Finish
26.22 mi13:11:413:08:267:129:44
9:33
#6607
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4642435443544186(Top 15%)3938(Top 24%)3938(Top 70%)
10K6.21 mi3.10 mi4158+4843919+4353919+4353749(Top 13%)3538(Top 22%)3538(Top 63%)
15K9.32 mi3.11 mi4147+113908+113908+114186(Top 15%)3938(Top 24%)3938(Top 70%)
20K12.43 mi3.11 mi4175-283929-213929-214494(Top 16%)4189(Top 26%)4189(Top 74%)
Half13.11 mi0.68 mi4201-263950-213950-214867(Top 17%)4527(Top 28%)4527(Top 80%)
25K15.53 mi2.42 mi4257-563993-433993-434924(Top 17%)4525(Top 28%)4525(Top 80%)
30K18.64 mi3.11 mi4297-404020-274020-274731(Top 17%)4312(Top 27%)4312(Top 76%)
20M20.00 mi1.36 mi4369-724077-574077-575420(Top 19%)4795(Top 30%)4795(Top 85%)
21M21.00 mi1.00 mi4416-474101-244101-245228(Top 18%)4549(Top 28%)4549(Top 81%)
35K21.75 mi0.75 mi4469-534143-424143-426283(Top 22%)5256(Top 33%)5256(Top 93%)
23M23.00 mi1.25 mi4988-5194572-4294572-42912282(Top 43%)8352(Top 52%)8352(Top 148%)
24M24.00 mi1.00 mi5320-3324844-2724844-27213322(Top 47%)8799(Top 55%)8799(Top 156%)
40K24.85 mi0.85 mi5768-4485171-3275171-32719668(Top 69%)11633(Top 72%)11633(Top 206%)
25.2M25.20 mi0.35 mi6019-2515353-1825353-18221882(Top 77%)12713(Top 79%)12713(Top 225%)
Finish26.22 mi1.02 mi6607-5885729-3765729-37621336(Top 75%)12442(Top 77%)12442(Top 221%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

4186

Males

3938

M18-39

3938

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3749

Males

3538

M18-39

3538

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

4186

Males

3938

M18-39

3938

15K→20K

9.3 - 12.4 mi

Top 16%
×5stories
+106ft-86ft

Overall

4494

Males

4189

M18-39

4189

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4867

Males

4527

M18-39

4527

Half→25K

13.1 - 15.5 mi

Top 17%
×4stories
+66ft-88ft

Overall

4924

Males

4525

M18-39

4525

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4731

Males

4312

M18-39

4312

30K→20M

18.6 - 20.0 mi

Top 19%
×5stories
+64ft-50ft

Overall

5420

Males

4795

M18-39

4795

20M→21M

20.0 - 21.0 mi

Top 18%
×8stories
+106ft-24ft

Overall

5228

Males

4549

M18-39

4549

21M→35K

21.0 - 21.8 mi

Top 22%
×7stories
+17ft-86ft

Overall

6283

Males

5256

M18-39

5256

35K→23M

21.8 - 23.0 mi

Top 43%
×5stories
+23ft-63ft

Overall

12282

Males

8352

M18-39

8352

23M→24M

23.0 - 24.0 mi

Top 47%
×6stories
+12ft-82ft

Overall

13322

Males

8799

M18-39

8799

24M→40K

24.0 - 24.9 mi

Top 69%
×1story
+6ft-20ft

Overall

19668

Males

11633

M18-39

11633

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

21882

Males

12713

M18-39

12713

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

21336

Males

12442

M18-39

12442

Passing Analysis

Category:
Athletes Passed
1091
Passed By
3056
Net Change
-1965
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4642
5K → 10K50925+484#4642#4158
10K → 15K9584+11#4158#4147
15K → 20K95123-28#4147#4175
20K → Half1137-26#4175#4201
Half → 25K74130-56#4201#4257
25K → 30K130170-40#4257#4297
30K → 20M48120-72#4297#4369
20M → 21M53100-47#4369#4416
21M → 35K3588-53#4416#4469
35K → 23M18537-519#4469#4988
23M → 24M8340-332#4988#5320
24M → 40K4452-448#5320#5768
40K → 25.2M3254-251#5768#6019
25.2M → Finish8596-588#6019#6607
TOTALS10913056-1965
📊

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