Boston Marathon logo
BOSTON MARATHON 2025

Nate Szymanowski

Bib: 3310•M

WA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 13%
Gender (Male)
#0 / 16105
Top 21%
Division (M18-39)
#0 / 5642
Top 45%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:05
Rank: #3579
Start → 5K
20:05 | 6:28/mi
10K· 6.21 mi
40:18
Rank: #3676 (-97)
5K → 10K
20:13 | 6:30/mi
15K· 9.32 mi
1:00:30
Rank: #3631 (+45)
10K → 15K
20:12 | 6:30/mi
20K· 12.43 mi
1:20:51
Rank: #3560 (+71)
15K → 20K
20:21 | 6:33/mi
Half· 13.11 mi
1:25:14
Rank: #3524 (+36)
20K → Half
4:23 | 6:25/mi
25K· 15.53 mi
1:41:09
Rank: #3458 (+66)
Half → 25K
15:55 | 6:34/mi
30K· 18.64 mi
2:02:00
Rank: #3296 (+162)
25K → 30K
20:51 | 6:43/mi
20M
2:11:15
Rank: #3224 (+72)
30K → 20M
9:15 | 6:48/mi
21M
2:18:30
Rank: #3209 (+15)
20M → 21M
7:15 | 7:15/mi
35K· 21.75 mi
2:23:38
Rank: #3220 (-11)
21M → 35K
5:08 | 6:52/mi
23M
2:33:33
Rank: #3523 (-303)
35K → 23M
9:55 | 7:55/mi
24M
2:40:26
Rank: #3500 (+23)
23M → 24M
6:53 | 6:53/mi
40K· 24.85 mi
2:46:31
Rank: #3508 (-8)
24M → 40K
6:05 | 7:07/mi
25.2M
2:49:12
Rank: #3509 (-1)
40K → 25.2M
2:41 | 7:47/mi
Finish· 26.22 mi
2:56:22
Rank: #3587 (-78)
25.2M → Finish
7:10 | 7:02/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
Time1:25:14
Pace6:30 /mi
2nd Half
Distance13.11 mi
Time1:31:08
Pace6:57 /mi
📊Positive Split: 6.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:1120:056:2820:05
6:28
-
10K
6.21 mi10:41:2440:186:2920:13
6:30
+0:02
15K
9.32 mi11:01:361:00:306:2920:12
6:30
0:00
20K
12.43 mi11:21:571:20:516:3020:21
6:33
+0:03
Half
13.11 mi11:26:201:25:146:304:23
6:25
-0:08
25K
15.53 mi11:42:151:41:096:3115:55
6:34
+0:09
30K
18.64 mi12:03:062:02:006:3320:51
6:43
+0:09
20M
20.00 mi12:12:212:11:156:349:15
6:48
+0:05
21M
21.00 mi12:19:362:18:306:367:15
7:15
+0:27
35K
21.75 mi12:24:442:23:386:365:08
6:52
-0:23
23M
23.00 mi12:34:392:33:336:419:55
7:55
+1:03
24M
24.00 mi12:41:322:40:266:416:53
6:53
-1:02
40K
24.85 mi12:47:372:46:316:426:05
7:07
+0:14
25.2M
25.20 mi12:50:182:49:126:432:41
7:47
+0:40
Finish
26.22 mi12:57:282:56:226:447:10
7:02
-0:45

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

6:25 /mi

Average Pace

6:44 /mi

Slowest Pace

7:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:41:09

57% of race

Time at Steady Pace

42:07

24% of race

Time at Slower Pace

33:06

19% of race

Average Pace: 6:44 /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 mi10:21:1120:056:2820:05
6:28
#3579
10K
6.21 mi10:41:2440:186:2920:13
6:30
#3676
15K
9.32 mi11:01:361:00:306:2920:12
6:30
#3631
20K
12.43 mi11:21:571:20:516:3020:21
6:33
#3560
Half
13.11 mi11:26:201:25:146:304:23
6:25
#3524
25K
15.53 mi11:42:151:41:096:3115:55
6:34
#3458
30K
18.64 mi12:03:062:02:006:3320:51
6:43
#3296
20M
20.00 mi12:12:212:11:156:349:15
6:48
#3224
21M
21.00 mi12:19:362:18:306:367:15
7:15
#3209
35K
21.75 mi12:24:442:23:386:365:08
6:52
#3220
23M
23.00 mi12:34:392:33:336:419:55
7:55
#3523
24M
24.00 mi12:41:322:40:266:416:53
6:53
#3500
40K
24.85 mi12:47:372:46:316:426:05
7:07
#3508
25.2M
25.20 mi12:50:182:49:126:432:41
7:47
#3509
Finish
26.22 mi12:57:282:56:226:447:10
7:02
#3587
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3579340034003586(Top 13%)3390(Top 21%)3390(Top 60%)
10K6.21 mi3.10 mi3676-973484-843484-843786(Top 13%)3571(Top 22%)3571(Top 63%)
15K9.32 mi3.11 mi3631+453438+463438+463586(Top 13%)3390(Top 21%)3390(Top 60%)
20K12.43 mi3.11 mi3560+713372+663372+663423(Top 12%)3242(Top 20%)3242(Top 57%)
Half13.11 mi0.68 mi3524+363339+333339+333268(Top 12%)3109(Top 19%)3109(Top 55%)
25K15.53 mi2.42 mi3458+663279+603279+603248(Top 11%)3076(Top 19%)3076(Top 55%)
30K18.64 mi3.11 mi3296+1623122+1573122+1572950(Top 10%)2778(Top 17%)2778(Top 49%)
20M20.00 mi1.36 mi3224+723054+683054+682993(Top 11%)2792(Top 17%)2792(Top 49%)
21M21.00 mi1.00 mi3209+153038+163038+163396(Top 12%)3118(Top 19%)3118(Top 55%)
35K21.75 mi0.75 mi3220-113042-43042-44505(Top 16%)4007(Top 25%)4007(Top 71%)
23M23.00 mi1.25 mi3523-3033312-2703312-2709411(Top 33%)6921(Top 43%)6921(Top 123%)
24M24.00 mi1.00 mi3500+233284+283284+283995(Top 14%)3534(Top 22%)3534(Top 63%)
40K24.85 mi0.85 mi3508-83287-33287-34570(Top 16%)3902(Top 24%)3902(Top 69%)
25.2M25.20 mi0.35 mi3509-13284+33284+34771(Top 17%)3969(Top 25%)3969(Top 70%)
Finish26.22 mi1.02 mi3587-783344-603344-605936(Top 21%)4694(Top 29%)4694(Top 83%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21stories
+97ft-345ft

Overall

3586

Males

3390

M18-39

3390

5K→10K

3.1 - 6.2 mi

Top 13%
×5stories
+79ft-138ft

Overall

3786

Males

3571

M18-39

3571

10K→15K

6.2 - 9.3 mi

Top 13%
×3stories
+67ft-78ft

Overall

3586

Males

3390

M18-39

3390

15K→20K

9.3 - 12.4 mi

Top 12%
×5stories
+106ft-86ft

Overall

3423

Males

3242

M18-39

3242

20K→Half

12.4 - 13.1 mi

Top 12%
×2stories
+19ft-37ft

Overall

3268

Males

3109

M18-39

3109

Half→25K

13.1 - 15.5 mi

Top 11%
×4stories
+66ft-88ft

Overall

3248

Males

3076

M18-39

3076

25K→30K

15.5 - 18.6 mi

Top 10%
×9stories
+181ft-148ft

Overall

2950

Males

2778

M18-39

2778

30K→20M

18.6 - 20.0 mi

Top 11%
×5stories
+64ft-50ft

Overall

2993

Males

2792

M18-39

2792

20M→21M

20.0 - 21.0 mi

Top 12%
×8stories
+106ft-24ft

Overall

3396

Males

3118

M18-39

3118

21M→35K

21.0 - 21.8 mi

Top 16%
×7stories
+17ft-86ft

Overall

4505

Males

4007

M18-39

4007

35K→23M

21.8 - 23.0 mi

Top 33%
×5stories
+23ft-63ft

Overall

9411

Males

6921

M18-39

6921

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3995

Males

3534

M18-39

3534

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4570

Males

3902

M18-39

3902

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4771

Males

3969

M18-39

3969

25.2M→Finish

25.2 - 26.2 mi

Top 21%
×2stories
+22ft-21ft

Overall

5936

Males

4694

M18-39

4694

Passing Analysis

Category:
Athletes Passed
1034
Passed By
1042
Net Change
-8
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3579
5K → 10K88185-97#3579#3676
10K → 15K12782+45#3676#3631
15K → 20K13160+71#3631#3560
20K → Half404+36#3560#3524
Half → 25K10034+66#3524#3458
25K → 30K19634+162#3458#3296
30K → 20M8816+72#3296#3224
20M → 21M6146+15#3224#3209
21M → 35K3041-11#3209#3220
35K → 23M19322-303#3220#3523
23M → 24M5734+23#3523#3500
24M → 40K4553-8#3500#3508
40K → 25.2M2728-1#3508#3509
25.2M → Finish25103-78#3509#3587
TOTALS10341042-8
📊

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