Boston Marathon logo
BOSTON MARATHON 2025

Wojciech Szymczak

Bib: 3104•M

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 9%
Gender (Male)
#0 / 16105
Top 15%
Division (M18-39)
#0 / 5642
Top 35%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
6:27/mi
20:02
↑ 97↓ 3451.5%
10K· 6.21 mi
6:24/mi
39:56
↑ 79↓ 1380.4%
15K· 9.32 mi
6:23/mi
59:46
↑ 67↓ 78
20K· 12.43 mi
6:26/mi
1:19:46
↑ 106↓ 860.1%
Half· 13.11 mi
6:20/mi
1:24:05
↑ 19↓ 370.5%
25K· 15.53 mi
6:27/mi
1:39:44
↑ 66↓ 880.2%
30K· 18.64 mi
6:31/mi
1:59:59
↑ 181↓ 1480.2%
20M
6:38/mi
2:09:00
↑ 64↓ 500.2%
21M
6:56/mi
2:15:56
↑ 106↓ 241.6%
35K· 21.75 mi
6:40/mi
2:20:55
↑ 17↓ 861.7%
23M
6:55/mi
2:29:34
↑ 23↓ 630.6%
24M
6:45/mi
2:36:19
↓ 821.3%
40K· 24.85 mi
7:00/mi
2:42:18
↓ 200.3%
25.2M
7:35/mi
2:44:55
↑ 13↓ 160.2%
Finish· 26.22 mi
6:39/mi
2:51:42
↑ 22↓ 21

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
Time1:24:05
Pace6:25 /mi
2nd Half
Distance13.11 mi
Time1:27:37
Pace6:41 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:20:5720:026:2720:02
6:27
-
10K
6.21 mi10:40:5139:566:2619:54
6:24
-0:03
15K
9.32 mi11:00:4159:466:2519:50
6:23
-0:01
20K
12.43 mi11:20:411:19:466:2520:00
6:26
+0:03
Half
13.11 mi11:25:001:24:056:254:19
6:20
-0:06
25K
15.53 mi11:40:391:39:446:2515:39
6:27
+0:07
30K
18.64 mi12:00:541:59:596:2620:15
6:31
+0:04
20M
20.00 mi12:09:552:09:006:279:01
6:38
+0:07
21M
21.00 mi12:16:512:15:566:286:56
6:56
+0:18
35K
21.75 mi12:21:502:20:556:294:59
6:40
-0:16
23M
23.00 mi12:30:292:29:346:308:39
6:55
+0:15
24M
24.00 mi12:37:142:36:196:316:45
6:45
-0:10
40K
24.85 mi12:43:132:42:186:325:59
7:00
+0:15
25.2M
25.20 mi12:45:502:44:556:332:37
7:35
+0:35
Finish
26.22 mi12:52:372:51:426:336:47
6:39
-0:56

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

6:20 /mi

Average Pace

6:33 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:43:06

95% of race

Time at Steady Pace

5:59

3% of race

Time at Slower Pace

2:37

2% of race

Average Pace: 6:33 /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 mi10:20:5720:026:2720:02
6:27
#3454
10K
6.21 mi10:40:5139:566:2619:54
6:24
#3249
15K
9.32 mi11:00:4159:466:2519:50
6:23
#3096
20K
12.43 mi11:20:411:19:466:2520:00
6:26
#2979
Half
13.11 mi11:25:001:24:056:254:19
6:20
#2955
25K
15.53 mi11:40:391:39:446:2515:39
6:27
#2867
30K
18.64 mi12:00:541:59:596:2620:15
6:31
#2643
20M
20.00 mi12:09:552:09:006:279:01
6:38
#2576
21M
21.00 mi12:16:512:15:566:286:56
6:56
#2509
35K
21.75 mi12:21:502:20:556:294:59
6:40
#2528
23M
23.00 mi12:30:292:29:346:308:39
6:55
#2534
24M
24.00 mi12:37:142:36:196:316:45
6:45
#2538
40K
24.85 mi12:43:132:42:186:325:59
7:00
#2553
25.2M
25.20 mi12:45:502:44:556:332:37
7:35
#2563
Finish
26.22 mi12:52:372:51:426:336:47
6:39
#2574
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3454328132812844(Top 10%)2709(Top 17%)2709(Top 48%)
10K6.21 mi3.10 mi3249+2053088+1933088+1933078(Top 11%)2931(Top 18%)2931(Top 52%)
15K9.32 mi3.11 mi3096+1532949+1392949+1392844(Top 10%)2709(Top 17%)2709(Top 48%)
20K12.43 mi3.11 mi2979+1172839+1102839+1102747(Top 10%)2617(Top 16%)2617(Top 46%)
Half13.11 mi0.68 mi2955+242816+232816+232699(Top 10%)2582(Top 16%)2582(Top 46%)
25K15.53 mi2.42 mi2867+882734+822734+822650(Top 9%)2523(Top 16%)2523(Top 45%)
30K18.64 mi3.11 mi2643+2242522+2122522+2122070(Top 7%)1969(Top 12%)1969(Top 35%)
20M20.00 mi1.36 mi2576+672460+622460+622188(Top 8%)2069(Top 13%)2069(Top 37%)
21M21.00 mi1.00 mi2509+672393+672393+672015(Top 7%)1898(Top 12%)1898(Top 34%)
35K21.75 mi0.75 mi2528-192407-142407-143301(Top 12%)3017(Top 19%)3017(Top 53%)
23M23.00 mi1.25 mi2534-62411-42411-43255(Top 11%)2966(Top 18%)2966(Top 53%)
24M24.00 mi1.00 mi2538-42412-12412-13240(Top 11%)2920(Top 18%)2920(Top 52%)
40K24.85 mi0.85 mi2553-152421-92421-93887(Top 14%)3406(Top 21%)3406(Top 60%)
25.2M25.20 mi0.35 mi2563-102429-82429-83822(Top 13%)3304(Top 21%)3304(Top 59%)
Finish26.22 mi1.02 mi2574-112439-102439-103650(Top 13%)3176(Top 20%)3176(Top 56%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21story building
+97ft-345ft

Overall

2844

Males

2709

M18-39

2709

5K→10K

3.1 - 6.2 mi

Top 11%
×5story building
+79ft-138ft

Overall

3078

Males

2931

M18-39

2931

10K→15K

6.2 - 9.3 mi

Top 10%
×3story building
+67ft-78ft

Overall

2844

Males

2709

M18-39

2709

15K→20K

9.3 - 12.4 mi

Top 10%
×5story building
+106ft-86ft

Overall

2747

Males

2617

M18-39

2617

20K→Half

12.4 - 13.1 mi

Top 10%
×2story building
+19ft-37ft

Overall

2699

Males

2582

M18-39

2582

Half→25K

13.1 - 15.5 mi

Top 9%
×4story building
+66ft-88ft

Overall

2650

Males

2523

M18-39

2523

25K→30K

15.5 - 18.6 mi

Top 7%
×9story building
+181ft-148ft

Overall

2070

Males

1969

M18-39

1969

30K→20M

18.6 - 20.0 mi

Top 8%
×5story building
+64ft-50ft

Overall

2188

Males

2069

M18-39

2069

20M→21M

20.0 - 21.0 mi

Top 7%
×8story building
+106ft-24ft

Overall

2015

Males

1898

M18-39

1898

21M→35K

21.0 - 21.8 mi

Top 12%
×7story building
+17ft-86ft

Overall

3301

Males

3017

M18-39

3017

35K→23M

21.8 - 23.0 mi

Top 11%
×5story building
+23ft-63ft

Overall

3255

Males

2966

M18-39

2966

23M→24M

23.0 - 24.0 mi

Top 11%
×6story building
+12ft-82ft

Overall

3240

Males

2920

M18-39

2920

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

3887

Males

3406

M18-39

3406

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3822

Males

3304

M18-39

3304

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2story building
+22ft-21ft

Overall

3650

Males

3176

M18-39

3176

Passing Analysis

Category:
Athletes Passed
1315
Passed By
435
Net Change
+880
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3454
5K → 10K25651+205#3454#3249
10K → 15K17724+153#3249#3096
15K → 20K14831+117#3096#2979
20K → Half317+24#2979#2955
Half → 25K11123+88#2955#2867
25K → 30K2339+224#2867#2643
30K → 20M8720+67#2643#2576
20M → 21M8114+67#2576#2509
21M → 35K2948-19#2509#2528
35K → 23M5056-6#2528#2534
23M → 24M4448-4#2534#2538
24M → 40K2742-15#2538#2553
40K → 25.2M1424-10#2553#2563
25.2M → Finish2738-11#2563#2574
TOTALS1315435+880
📊

Passing Visuals

Category:
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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing