Boston Marathon logo
BOSTON MARATHON 2025

Jack Marzulli

Bib: 7128•M

NY

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 16%
Gender (Male)
#0 / 16105
Top 26%
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
19:28
Rank: #2237
Start → 5K
19:28 | 6:16/mi
10K· 6.21 mi
39:46
Rank: #3070 (-833)
5K → 10K
20:18 | 6:32/mi
15K· 9.32 mi
1:00:13
Rank: #3397 (-327)
10K → 15K
20:27 | 6:35/mi
20K· 12.43 mi
1:20:59
Rank: #3638 (-241)
15K → 20K
20:46 | 6:41/mi
Half· 13.11 mi
1:25:30
Rank: #3678 (-40)
20K → Half
4:31 | 6:37/mi
25K· 15.53 mi
1:42:01
Rank: #3800 (-122)
Half → 25K
16:31 | 6:49/mi
30K· 18.64 mi
2:04:24
Rank: #4109 (-309)
25K → 30K
22:23 | 7:12/mi
20M
2:14:24
Rank: #4264 (-155)
30K → 20M
10:00 | 7:22/mi
21M
2:22:05
Rank: #4326 (-62)
20M → 21M
7:41 | 7:41/mi
35K· 21.75 mi
2:27:19
Rank: #4353 (-27)
21M → 35K
5:14 | 7:00/mi
23M
2:36:22
Rank: #4377 (-24)
35K → 23M
9:03 | 7:14/mi
24M
2:43:31
Rank: #4417 (-40)
23M → 24M
7:09 | 7:09/mi
40K· 24.85 mi
2:49:38
Rank: #4421 (-4)
24M → 40K
6:07 | 7:09/mi
25.2M
2:52:16
Rank: #4405 (+16)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
2:59:27
Rank: #4514 (-109)
25.2M → Finish
7:11 | 7:03/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
Time1:25:30
Pace6:31 /mi
2nd Half
Distance13.11 mi
Time1:33:57
Pace7:10 /mi
📊Positive Split: 9.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:0019:286:1619:28
6:16
-
10K
6.21 mi10:45:1839:466:2420:18
6:32
+0:16
15K
9.32 mi11:05:451:00:136:2820:27
6:35
+0:03
20K
12.43 mi11:26:311:20:596:3120:46
6:41
+0:06
Half
13.11 mi11:31:021:25:306:314:31
6:37
-0:04
25K
15.53 mi11:47:331:42:016:3416:31
6:49
+0:12
30K
18.64 mi12:09:562:04:246:4022:23
7:12
+0:23
20M
20.00 mi12:19:562:14:246:4310:00
7:22
+0:10
21M
21.00 mi12:27:372:22:056:467:41
7:41
+0:19
35K
21.75 mi12:32:512:27:196:465:14
7:00
-0:41
23M
23.00 mi12:41:542:36:226:489:03
7:14
+0:14
24M
24.00 mi12:49:032:43:316:497:09
7:09
-0:05
40K
24.85 mi12:55:102:49:386:496:07
7:09
0:00
25.2M
25.20 mi12:57:482:52:166:502:38
7:38
+0:29
Finish
26.22 mi13:04:592:59:276:517:11
7:03
-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

6:16 /mi

Average Pace

6:51 /mi

Slowest Pace

7:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:42:01

57% of race

Time at Steady Pace

57:07

32% of race

Time at Slower Pace

20:19

11% of race

Average Pace: 6:51 /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 mi10:25:0019:286:1619:28
6:16
#2237
10K
6.21 mi10:45:1839:466:2420:18
6:32
#3070
15K
9.32 mi11:05:451:00:136:2820:27
6:35
#3397
20K
12.43 mi11:26:311:20:596:3120:46
6:41
#3638
Half
13.11 mi11:31:021:25:306:314:31
6:37
#3678
25K
15.53 mi11:47:331:42:016:3416:31
6:49
#3800
30K
18.64 mi12:09:562:04:246:4022:23
7:12
#4109
20M
20.00 mi12:19:562:14:246:4310:00
7:22
#4264
21M
21.00 mi12:27:372:22:056:467:41
7:41
#4326
35K
21.75 mi12:32:512:27:196:465:14
7:00
#4353
23M
23.00 mi12:41:542:36:226:489:03
7:14
#4377
24M
24.00 mi12:49:032:43:316:497:09
7:09
#4417
40K
24.85 mi12:55:102:49:386:496:07
7:09
#4421
25.2M
25.20 mi12:57:482:52:166:502:38
7:38
#4405
Finish
26.22 mi13:04:592:59:276:517:11
7:03
#4514
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2237213721374096(Top 14%)3855(Top 24%)3855(Top 68%)
10K6.21 mi3.10 mi3070-8332920-7832920-7833987(Top 14%)3754(Top 23%)3754(Top 67%)
15K9.32 mi3.11 mi3397-3273226-3063226-3064096(Top 14%)3855(Top 24%)3855(Top 68%)
20K12.43 mi3.11 mi3638-2413444-2183444-2184306(Top 15%)4029(Top 25%)4029(Top 71%)
Half13.11 mi0.68 mi3678-403477-333477-334626(Top 16%)4319(Top 27%)4319(Top 77%)
25K15.53 mi2.42 mi3800-1223582-1053582-1054973(Top 18%)4567(Top 28%)4567(Top 81%)
30K18.64 mi3.11 mi4109-3093853-2713853-2715924(Top 21%)5259(Top 33%)5259(Top 93%)
20M20.00 mi1.36 mi4264-1553987-1343987-1346126(Top 22%)5282(Top 33%)5282(Top 94%)
21M21.00 mi1.00 mi4326-624026-394026-395558(Top 20%)4768(Top 30%)4768(Top 85%)
35K21.75 mi0.75 mi4353-274042-164042-165328(Top 19%)4610(Top 29%)4610(Top 82%)
23M23.00 mi1.25 mi4377-244052-104052-105045(Top 18%)4352(Top 27%)4352(Top 77%)
24M24.00 mi1.00 mi4417-404077-254077-255508(Top 19%)4605(Top 29%)4605(Top 82%)
40K24.85 mi0.85 mi4421-44072+54072+54790(Top 17%)4068(Top 25%)4068(Top 72%)
25.2M25.20 mi0.35 mi4405+164055+174055+174068(Top 14%)3484(Top 22%)3484(Top 62%)
Finish26.22 mi1.02 mi4514-1094141-864141-866052(Top 21%)4760(Top 30%)4760(Top 84%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21stories
+97ft-345ft

Overall

4096

Males

3855

M18-39

3855

5K→10K

3.1 - 6.2 mi

Top 14%
×5stories
+79ft-138ft

Overall

3987

Males

3754

M18-39

3754

10K→15K

6.2 - 9.3 mi

Top 14%
×3stories
+67ft-78ft

Overall

4096

Males

3855

M18-39

3855

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

4306

Males

4029

M18-39

4029

20K→Half

12.4 - 13.1 mi

Top 16%
×2stories
+19ft-37ft

Overall

4626

Males

4319

M18-39

4319

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

4973

Males

4567

M18-39

4567

25K→30K

15.5 - 18.6 mi

Top 21%
×9stories
+181ft-148ft

Overall

5924

Males

5259

M18-39

5259

30K→20M

18.6 - 20.0 mi

Top 22%
×5stories
+64ft-50ft

Overall

6126

Males

5282

M18-39

5282

20M→21M

20.0 - 21.0 mi

Top 20%
×8stories
+106ft-24ft

Overall

5558

Males

4768

M18-39

4768

21M→35K

21.0 - 21.8 mi

Top 19%
×7stories
+17ft-86ft

Overall

5328

Males

4610

M18-39

4610

35K→23M

21.8 - 23.0 mi

Top 18%
×5stories
+23ft-63ft

Overall

5045

Males

4352

M18-39

4352

23M→24M

23.0 - 24.0 mi

Top 19%
×6stories
+12ft-82ft

Overall

5508

Males

4605

M18-39

4605

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4790

Males

4068

M18-39

4068

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

4068

Males

3484

M18-39

3484

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

6052

Males

4760

M18-39

4760

Passing Analysis

Category:
Athletes Passed
489
Passed By
2766
Net Change
-2277
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2237
5K → 10K5838-833#2237#3070
10K → 15K22349-327#3070#3397
15K → 20K40281-241#3397#3638
20K → Half646-40#3638#3678
Half → 25K45167-122#3678#3800
25K → 30K52361-309#3800#4109
30K → 20M36191-155#4109#4264
20M → 21M50112-62#4264#4326
21M → 35K3259-27#4326#4353
35K → 23M6387-24#4353#4377
23M → 24M3979-40#4377#4417
24M → 40K4751-4#4417#4421
40K → 25.2M3014+16#4421#4405
25.2M → Finish22131-109#4405#4514
TOTALS4892766-2277
📊

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